CN106936320A - A kind of crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter - Google Patents

Abstract

The invention provides an interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, which relates to the technical field of power electronics applications. It includes two bidirectional full-bridge LLC resonant converters interleaved in parallel; the first bidirectional full-bridge LLC resonant converter includes the first primary circuit, the first secondary circuit, a resonant transformer and its excitation inductance; the second bidirectional full bridge The LLC resonant converter includes a second primary circuit, a second secondary circuit, a resonant transformer and its excitation inductance; the primary circuit and secondary circuit of each bidirectional full-bridge LLC resonant converter adopt a full-bridge LLC resonant circuit, It is used to realize the bidirectional flow of energy; the two resonant transformers and their excitation inductance and four resonant inductances in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter adopt integrated magnetic parts to realize magnetic integration. The invention can realize high power, high transformation ratio, small volume and two-way high-efficiency operation of electric energy.

Description

An Interleaved Parallel Magnetic Integrated Bidirectional Full-Bridge LLC Resonant Converter

technical field

The invention relates to the technical field of power electronics applications, in particular to an interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter.

Background technique

In recent years, switching power supplies that provide electrical energy for various electrical equipment are developing in the direction of low voltage, high current, small size, light weight, high efficiency, thinness and integration, including for the central processing unit (Central Processing Unit) of computers. , CPU) and digital signal processors (Digital Signal Processing, DSP) and other high-precision, high-speed microprocessors to provide precision power supply voltage adjustment modules, as well as widely used in electric vehicles, hybrid vehicles, uninterruptible power supplies that have emerged in recent years , power quality regulation power supply, aviation power supply, new energy power generation and superconducting energy storage and other bidirectional switching power supplies that require bidirectional energy flow. ZVS, because there is no filter inductor on the secondary side of the converter, if full-bridge rectification is used, the voltage stress of the rectifier diode is only the output voltage, and ZCS can be realized, thereby reducing switching losses. In addition, in order to reduce the size of the LLC resonant converter, it is necessary to integrate its resonant transformer and resonant inductor.

Most of the LLC converters in the prior art adopt a half-bridge structure, which can only operate in one direction. Magnetic integration only realizes the integration of a single transformer and a single inductor, and it is difficult to realize the high power, high transformation ratio, and small size of the LLC resonant converter. And two-way high-efficiency operation.

Contents of the invention

Aiming at the defects of the prior art, the present invention provides an interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, which realizes the interleaved parallel connection of the full-bridge LLC resonant converter, and the bidirectional operation and magnetic integration after the interleaved parallel connection, and realizes the LLC resonant conversion High power, high transformation ratio, small size and bi-directional high-efficiency operation of the converter.

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, including two interleaved parallel bidirectional full bridge LLC resonant converters, the resonant transformer and resonant inductor in the two interleaved parallel bidirectional full bridge LLC resonant converters adopt integrated magnetic components to achieve magnetic integration; the first bidirectional full-bridge LLC resonant converter includes the first primary circuit, the first secondary circuit, and the resonant transformer T _R1 and its excitation inductance L _m1 ; the first primary circuit includes the power switch tube S ₁₁ ～S ₁₄ , resonant inductance L ₁₁ and resonant capacitor C ₁₁ ; the first secondary side circuit includes power switch tubes S ₁₅ ～S ₁₈ , resonant inductance L ₁₂ and resonant capacitor C ₁₂ ; the second bidirectional full-bridge LLC resonant converter includes The second primary circuit, the second secondary circuit, and the resonant transformer T _R2 and its excitation inductance L _m2 ; the second primary circuit includes power switch tubes S ₂₁ -S ₂₄ , resonant inductance L ₂₁ and resonant capacitor C ₂₁ ; the second The secondary side circuit includes power switch tubes S ₂₅ ~ S ₂₈ , resonant inductor L ₂₂ and resonant capacitor C ₂₂ ; the primary side circuit and secondary side circuit of each bidirectional full-bridge LLC resonant converter adopt a full-bridge LLC resonant circuit. To realize the two-way flow of energy.

Further, one solution is that the interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter also includes two input capacitors C ₁ and C ₂ , the input capacitors C ₁ and C ₂ are connected in series, and the input capacitor C ₁ connected in series is connected to The two input terminals of the one-way bidirectional full-bridge LLC resonant converter, and the input capacitor C2 are connected to the _two input terminals of the second bidirectional full-bridge LLC resonant converter.

Another solution is that the interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter also includes an intermediate capacitor C and two interleaved parallel magnetically integrated bidirectional Buck/Boost converters; the first bidirectional Buck/Boost converter includes power switch tubes S ₁ , S ₂ and inductance L ₁ , the second bidirectional Buck/Boost converter includes power switches S ₃ , S ₄ and inductance L ₂ ; the inductance L ₁ of the first bidirectional Buck/Boost converter and the second The inductance L ₂ of the bidirectional Buck/Boost converter performs reverse magnetic coupling to form a magnetically integrated coupled inductance; the output ends of the two-way bidirectional Buck/Boost converters after the interleaved parallel connection are connected in parallel with the intermediate capacitor C, and the two interleaved parallel connected The input terminals of the bidirectional full-bridge LLC resonant converter are both connected to both ends of the intermediate capacitor C.

Alternatively, the interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter also includes an intermediate capacitor C and two interleaved parallel magnetically integrated bidirectional Buck/Boost converters, and the first bidirectional Buck/Boost converter includes power switch tubes S ₁ , S ₂ and inductance L ₁ , the second bidirectional Buck/Boost converter includes power switch tubes S ₃ , S ₄ and inductance L ₁ ; the inductance L ₁ of the first bidirectional Buck/Boost converter and the second bidirectional Buck/Boost The inductance L ₂ of the converter performs reverse magnetic coupling to form a magnetically integrated coupled inductance; the input terminals of the two-way bidirectional Buck/Boost converter after interleaving and parallel connection are connected in parallel with the intermediate capacitor C, and the two-way interleaving and parallel bidirectional full-bridge LLC The output terminals of the resonant converter are both connected to both ends of the intermediate capacitor C.

Further, the integrated magnetic part that realizes the magnetic integration of the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is a resonant transformer integrated magnetic part, which is used in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter The magnetic integration of the resonant transformer T _R1 and its excitation inductance L _m1 and the resonant transformer T _R2 and its excitation inductance L _m2 ; realize the integrated magnetic integration of the resonant inductance in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter The component is a resonant inductor integrated magnetic component, which is used for the magnetic integration of the resonant inductors L ₁₁ and L ₂₁ and the magnetic integration of the resonant inductors L ₁₂ and L ₂₂ in the two-way interleaved and parallel bidirectional full-bridge LLC resonant converter;

The iron core of the resonant transformer integrated magnetic parts is an "EE"-shaped iron core structure, including two "E"-shaped iron cores with opposite magnetic columns. There is no air gap between the middle columns of the two "E"-shaped iron cores, and the upper magnetic column There are air gaps between the two and the lower magnetic columns; N ₁₁ and N ₁₂ windings are respectively wound on the upper magnetic columns of the two "E" shaped iron cores of the "EE" shaped core structure to form a resonant transformer T _R1 and its excitation inductance L _m1 , N ₂₁ and N ₂₂ windings are respectively wound on the lower magnetic column to form a resonant transformer T _R2 and its excitation inductance L _m2 ;

The core of the resonant inductor integrated magnetic parts is an "EI"-shaped core structure, including an "E"-shaped core and an "I"-shaped core. The "I"-shaped core is placed on the opening side of the "E"-shaped core, and the "E" There is an air gap between the three magnetic columns of the "shaped iron core and the "I" shaped iron core; windings are wound on the upper magnetic column of the "E" shaped iron core of the integrated magnetic part of the resonant inductor to form a resonant inductance L ₁₁ or L ₁₂ , a winding is wound on the lower magnetic column to form a resonant inductance L ₂₁ or L ₂₂ .

Further, the integrated magnetic part that realizes the magnetic integration of the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is a resonant transformer integrated magnetic part, which is used in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter The magnetic integration of the resonant transformer T _R1 and its excitation inductance L _m1 and the resonant transformer T _R2 and its excitation inductance L _m2 ; realize the integrated magnetic integration of the resonant inductance in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter The component is a resonant inductor integrated magnetic component, which is used for the magnetic integration of the resonant inductors L ₁₁ and L ₂₁ and the magnetic integration of the resonant inductors L ₁₂ and L ₂₂ in the two-way interleaved and parallel bidirectional full-bridge LLC resonant converter;

The iron core of the integrated magnetic parts of the resonant transformer and the iron core of the integrated magnetic parts of the resonant inductor both have a core structure including a "ten" shaped iron core and two "E" shaped iron cores, and the "ten" shaped iron core is placed on the opposite side of the two magnetic columns. In the middle of the "E" shaped iron core;

There is no air gap between the center columns of the two "E" shaped cores of the integrated magnetic parts of the resonant transformer and the left and right yokes of the "ten" shaped iron core, and the two "E" shaped iron cores of the resonant transformer integrated magnetic parts There is an air gap between the upper or lower magnetic column of the iron core and the upper or lower magnetic column of the "ten"-shaped iron core; N ₁₁ and N ₁₂ windings form a resonant transformer T _R1 and its exciting inductance L _m1 , and N ₂₁ and N ₂₂ windings are respectively wound on the lower magnetic column to form a resonant transformer T _R2 and its exciting inductance L _m2 ;

There is an air gap between the central pillars of the two "E" shaped cores of the resonant inductor integrated magnetic parts and the left and right yokes of the "ten" shaped iron core, and the two "E" shaped iron cores of the resonant inductor integrated magnetic parts There is an air gap between the upper or lower magnetic column of the "cross" shaped iron core and the upper or lower magnetic column of the "cross" shaped iron core; the upper magnetic column of the "cross" shaped iron core of the resonant inductor integrated A winding is wound to form a resonant inductance L ₁₁ or L ₁₂ , and a winding is wound on the lower magnetic column to form a resonant inductance L ₂₁ or L ₂₂ .

Further, the integrated magnetic part that realizes the magnetic integration of the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is a resonant transformer integrated magnetic part, which is used in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter The magnetic integration of the resonant transformer T _R1 and its excitation inductance L _m1 and the resonant transformer T _R2 and its excitation inductance L _m2 ; realize the integrated magnetic integration of the resonant inductance in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter The component is a resonant inductor integrated magnetic component, which is used for the magnetic integration of the resonant inductors L ₁₁ and L ₂₁ and the magnetic integration of the resonant inductors L ₁₂ and L ₂₂ in the two-way interleaved and parallel bidirectional full-bridge LLC resonant converter;

The iron core of the integrated magnetic parts of the resonant transformer and the iron core of the integrated magnetic parts of the resonant inductor both have a core structure including a "ten" shaped iron core and two "[" shaped iron cores, and the "ten" shaped iron core is placed on the opposite side of the two openings. "[" shaped iron core in the middle;

There is no air gap between the middle of the two "["-shaped iron cores of the resonant transformer integrated magnetic parts and the left and right yokes of the "ten"-shaped iron core, and the two "["-shaped iron cores of the resonant transformer integrated magnetic parts There is an air gap between the upper or lower magnetic column of the resonant transformer and the upper or lower magnetic column of the "ten"-shaped iron core; N ₁₁ is wound on the upper magnetic column of the "ten"-shaped iron core of the integrated magnetic part of the resonant transformer , N ₁₂ windings to form a resonant transformer T _R1 and its exciting inductance L _m1 , winding N ₂₁ and N ₂₂ windings on the lower magnetic column to form a resonant transformer T _R2 and its exciting inductance L _m2 ;

There is an air gap between the middle of the two "[" shaped iron cores of the resonant inductor integrated magnetic parts and the left and right yokes of the "ten" shaped iron core, and the two "[" shaped iron cores of the resonant inductor integrated magnetic parts There is an air gap between the upper or lower magnetic column of the iron core and the upper or lower magnetic column of the "ten"-shaped iron core; the winding is wound on the upper magnetic column of the "cross"-shaped iron core of the resonant inductor integrated magnetic part To form the resonant inductance L ₁₁ or L ₁₂ , a winding is wound on the lower magnetic column to form the resonant inductance L ₂₁ or L ₂₂ .

Further, the integrated magnetic parts that realize the magnetic integration of the resonant transformer and the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are interleaved parallel fully integrated magnetic parts, which are used for the two-way interleaved parallel bidirectional full-bridge LLC Magnetic integration of resonant transformer T _R1 and its exciting inductance L _m1 , resonant transformer T _R2 and its exciting inductance L _m2 and four resonant inductances L ₁₁ , L ₁₂ , L ₂₁ , and L ₂₂ in the resonant converter;

The iron core of the staggered parallel fully integrated magnetic parts includes two "E"-shaped iron cores and two "I"-shaped iron cores, and the magnetic columns of the two "E"-shaped iron cores are placed opposite to form an "EE"-shaped iron core structure. There is no air gap between the middle columns of the "E"-shaped iron core, and there are air gaps between the upper magnetic columns and the lower magnetic columns; two "I"-shaped iron cores are placed vertically on the "EE" In the middle of the upper and lower windows of the "EE"-shaped iron core structure; N ₁₁ and N ₁₂ windings are respectively wound on the upper magnetic columns of the two "E"-shaped iron cores of the "EE"-shaped iron core structure to form a resonant transformer T _R1 and its excitation Inductance L _m1 , N ₂₁ and N ₂₂ windings are respectively wound on the lower magnetic column to form a resonant transformer T _R2 and its excitation inductance L _m2 . The magnetic fields generated by N ₁₁ and N ₁₂ windings or N ₂₁ and N ₂₂ windings cannot all pass through each other, and a part of each magnetic field returns through the "I" shaped iron core placed in the upper or lower window of the "EE" shaped iron core structure, Leakage flux with or leakage flux with Leakage inductances are formed respectively as resonant inductances, and resonant inductances L ₁₁ and L ₁₂ or resonant inductances L ₂₁ and L ₂₂ are formed, respectively.

Further, the integrated magnetic parts that realize the magnetic integration of the resonant transformer and the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are interleaved parallel fully integrated magnetic parts, which are used for the two-way interleaved parallel bidirectional full-bridge LLC Magnetic integration of resonant transformer T _R1 and its exciting inductance L _m1 , resonant transformer T _R2 and its exciting inductance L _m2 and four resonant inductances L ₁₁ , L ₁₂ , L ₂₁ , and L ₂₂ in the resonant converter;

The iron core of the staggered parallel fully integrated magnetic parts includes four "E"-shaped iron cores, and the magnetic columns of two "E"-shaped iron cores are placed opposite to each other to form an "EE"-shaped iron core structure. The two "E"-shaped iron cores There is no air gap between the middle pillars, and there are air gaps between the upper magnetic pillars and the lower magnetic pillars; the upper magnetic pillars of the two "E" shaped iron cores of the "EE" shaped core structure are respectively N ₁₁ and N ₁₂ windings are wound to form a resonant transformer T _R1 and its exciting inductance L _m1 , and N ₂₁ and N ₂₂ windings are respectively wound on the lower magnetic column to form a resonant transformer T _R2 and its exciting inductance L _m2 ; the third The opening direction of the "E"-shaped iron core is placed towards the side of the "EE"-shaped iron core winding N ₁₁ and N ₁₂ windings. The three magnetic columns of the "E"-shaped iron core are connected with the two pieces of the "EE"-shaped iron core. There is an air gap between the upper magnetic columns of the "E"-shaped iron core; the magnetic fields generated by the N ₁₁ winding and the N ₁₂ winding cannot all pass through each other, and each part of the magnetic field passes through the magnetic column of the third "E"-shaped iron core return, forming the leakage flux with Leakage inductances are formed respectively as resonant inductances, and resonant inductances L ₁₁ and L ₁₂ are formed respectively; the opening direction of the fourth "E"-shaped iron core is placed toward the side where the "EE"-shaped iron core is wound with N ₂₁ and N ₂₂ windings, and the " There is an air gap between the three magnetic columns of the E"-shaped iron core and the lower magnetic columns of the two "E"-shaped iron cores of the "EE"-shaped iron core; the magnetic fields generated by the N ₂₁ winding and the N ₂₂ winding cannot interact with each other All pass through each other, and each part of the magnetic field returns through the magnetic column of the fourth "E"-shaped iron core to form a leakage flux with Leakage inductances are formed respectively as resonant inductances, and resonant inductances L ₂₁ and L ₂₂ are respectively formed.

Further, the integrated magnetic parts that realize the magnetic integration of the resonant transformer and the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are interleaved parallel fully integrated magnetic parts, which are used for the two-way interleaved parallel bidirectional full-bridge LLC Magnetic integration of resonant transformer T _R1 and its exciting inductance L _m1 , resonant transformer T _R2 and its exciting inductance L _m2 and four resonant inductances L ₁₁ , L ₁₂ , L ₂₁ , and L ₂₂ in the resonant converter;

The iron core of the staggered parallel fully integrated magnetic parts includes three sets of "EE" shaped iron cores arranged in sequence, each set of "EE" shaped iron cores has two "E" shaped iron cores placed up and down, and two "E" shaped iron cores placed up and down There are air gaps between the three magnetic columns of the shaped core; the three sets of "EE" shaped cores are the first set of "EE" shaped iron cores, the second set of "EE" shaped iron cores and the third set of "EE" shaped iron cores from front to back. shaped core; N ₁₁ windings are wound on the same side of the upper core of the first set of "EE" shaped cores and the upper core of the second set of "EE" shaped cores, and the second set of "EE" shaped cores N ₁₂ windings are wound on the same side of the lower core of the iron core and the lower core of the third group of "EE"-shaped cores, N ₁₁ windings and N ₁₂ windings are located on the same side, and the second group of "EE"-shaped cores The N ₁₁ winding on the upper core and the N ₁₂ winding on the lower core form a resonant transformer T _R1 and its exciting inductance L _m1 , and the N ₁₁ winding on the upper core of the first group of "EE" shaped cores forms a resonant inductance L ₁₁ , the N ₁₂ winding on the lower core of the third group of "EE" shaped cores forms a resonant inductance L ₁₂ ; the upper core of the first group of "EE" shaped cores and the upper core of the second group of "EE" shaped cores N ₂₁ windings are commonly wound on the magnetic column on the other side, and N ₂₂ windings are commonly wound on the other side of the magnetic column of the lower core of the second set of "EE" shaped core and the lower core of the third set of "EE" shaped core , the N ₂₁ winding and the N ₂₂ winding are located on the same side, the N ₂₁ winding on the upper core and the N ₂₂ winding on the lower core of the second group of "EE" shaped cores form a resonant transformer T _R2 and its exciting inductance L _m2 , The N ₂₁ winding on the upper core of the first group of "EE" shaped cores forms a resonant inductance L ₂₁ , and the N ₂₂ winding on the lower core of the third group of "EE" shaped cores forms a resonant inductance L ₂₂ .

It can be known from the above technical solution that the beneficial effect of the present invention lies in that the interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter provided by the present invention can be achieved through the interleaved parallel connection of two full-bridge LLC resonant converters, and the bidirectional The operation and magnetic integration realize the high power, high transformation ratio, small size and bidirectional high efficiency operation of the LLC resonant converter.

Two or more full-bridge LLC resonant converters operate in parallel in both directions, and the power and capacity of the converters are doubled to realize high-voltage forward and reverse transmission of electric energy; through interleaved control and channel shielding control of multi-channel parallel converters , when the load requires high power, multiple converters are put into operation at the same time, when the load requires low power, reduce the number of converters to work, improve the efficiency of the converter, especially the light load efficiency; interleaved parallel magnetic integrated bidirectional full-bridge LLC resonant conversion The input terminal of the converter is connected in parallel with two series input capacitors. When the input voltage of the high-voltage side of the converter is high, the withstand voltage of the power switch tube is reduced, and LLC resonant conversion is realized in the full load range, thereby reducing switching losses and improving efficiency. ; When the voltage on the high-voltage input side of the converter is relatively high and has a wide range of variation, the input terminal of the interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter is connected in parallel with an interleaved parallel magnetically integrated bidirectional Buck/Boost converter, or the converter When the voltage on the low-voltage output side of the low-voltage output side is low and the variation range is wide, the output terminal of the interleaved parallel magnetic integrated bidirectional full-bridge LLC resonant converter is connected in parallel with an interleaved parallel magnetic integrated bidirectional Buck/Boost converter, which can reduce the power switch. Withstand voltage, realize LLC resonant conversion in the full load range, and realize zero-voltage switching (ZVS) of the power switch tube. Magnetic integration technology realizes magnetic integration of the resonant transformer and resonant inductor in the interleaved parallel bidirectional full-bridge LLC resonant converter, reducing the volume and loss of the converter.

Description of drawings

FIG. 1 is a circuit topology diagram of an interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter provided by Embodiment 1 of the present invention;

FIG. 2 is a circuit topology diagram of an interleaved series-parallel magnetically integrated bidirectional full-bridge LLC resonant converter provided by Embodiment 2 of the present invention;

FIG. 3 is a circuit topology diagram of a composite interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter provided by Embodiment 3 of the present invention;

Fig. 4 is a circuit topology diagram of a composite interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter provided by Embodiment 4 of the present invention;

Fig. 5 is a schematic structural diagram of the integrated magnetic parts of the resonant transformer provided by Embodiment 1 of the present invention;

Fig. 6 is a schematic structural diagram of a resonant inductor integrated magnetic part provided by Embodiment 1 of the present invention;

Fig. 7 is a schematic structural diagram of the integrated magnetic parts of the resonant transformer provided by Embodiment 2 of the present invention;

Fig. 8 is a schematic structural diagram of a resonant inductor integrated magnetic part provided by Embodiment 2 of the present invention;

Fig. 9 is a schematic structural view of the integrated magnetic parts of the resonant transformer provided by Embodiment 3 of the present invention;

Fig. 10 is a schematic structural view of the resonant inductor integrated magnetic part provided by the third embodiment of the present invention;

Fig. 11 is a schematic structural diagram of a fully integrated magnetic part of a resonant transformer and a resonant inductor provided in Embodiment 4 of the present invention;

Fig. 12 is a schematic structural view of the fully integrated magnetic parts of the resonant transformer and resonant inductor provided by Embodiment 5 of the present invention;

Fig. 13 is a schematic structural diagram of a fully integrated magnetic part of a resonant transformer and a resonant inductor provided in Embodiment 6 of the present invention.

In the figure: 1. The iron core of the integrated magnetic parts constituting the resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 ; 2. The iron core of the integrated magnetic parts forming the resonant inductance L ₁₁ and L ₂₁ ; 3. The iron core of the integrated magnetic parts constituting the resonant inductance L ₁₂ and L ₂₂ ; 4. "E" shaped iron core; 5. "I" shaped iron core; 6. "Ten" shaped iron core; 7. "[" shaped iron core; 8. The window of "EE" shaped iron core.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Embodiment one:

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, as shown in Figure 1, includes two interleaved and parallel LLC resonant converters, resonant transformers and resonant inductors in the two interleaved parallel bidirectional full-bridge LLC resonant converters Magnetic integration is achieved by using integrated magnetic parts; the first bidirectional full-bridge LLC resonant converter includes the first primary circuit, the first secondary circuit, and the resonant transformer T _R1 and its excitation inductance L _m1 ; the first primary circuit includes the power Switch tubes S ₁₁ ～S ₁₄ , resonant inductor L ₁₁ and resonant capacitor C ₁₁ ; the first secondary side circuit includes power switch tubes S ₁₅ ～S ₁₈ , resonant inductor L ₁₂ and resonant capacitor C ₁₂ ; the second bidirectional full-bridge LLC The resonant converter includes the second primary circuit, the second secondary circuit, the resonant transformer T _R2 and its excitation inductance L _m2 ; the second primary circuit includes the power switch tubes S ₂₁ ~ S ₂₄ , the resonant inductance L ₂₁ and the resonant capacitor C ₂₁ ; the second secondary side circuit includes power switch tubes S ₂₅ ~ S ₂₈ , resonant inductor L ₂₂ and resonant capacitor C ₂₂ ; the primary side circuit and secondary side circuit of each bidirectional full-bridge LLC resonant converter adopt a full-bridge type The LLC resonant circuit realizes the bidirectional flow of energy; the two bidirectional full-bridge LLC resonant converters are interleaved and paralleled, and the input end of the interleaved and paralleled bidirectional full-bridge LLC resonant converter is connected to the high voltage DC power supply V _H , and the output end is connected to the low voltage DC power source V _L . The resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 are integrated on the core 1, the resonant inductors L ₁₁ and L ₂₁ are integrated on the core 2, and the resonant inductors L ₁₂ and L ₂₂ are integrated on the core 3 on. Thus, an interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter is formed, and the interleaved control is performed on two parallel bidirectional full-bridge LLC resonant converters. The interleaved control refers to the interleaved control of the two full-bridge LLC resonant converters, that is, the phase difference of the control signals of the power switch tubes of the two LLC resonant converters is 90 degrees, or 1/4 cycle. The two-way interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter of this embodiment can be extended to three or more ways.

The integrated magnetic parts that realize the magnetic integration of the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are resonant transformer integrated magnetic parts, which are used for the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter. Magnetic integration of T _R1 and its exciting inductance L _m1 and resonant transformer T _R2 and its exciting inductance L _m2 . The core of the integrated magnetic parts of the resonant transformer, that is, the iron core 1 of the integrated magnetic parts of the resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 shown in Figure 1, is an "EE" shaped core structure , as shown in Figure 5, including two "E" shaped iron cores 4 opposite to each other, there is no air gap between the middle legs of the two "E" shaped iron cores 4, the upper magnetic legs and the lower magnetic legs There is an air gap between them. N ₁₁ and N ₁₂ windings are respectively wound on the upper magnetic legs of the two "E" shaped iron cores 4 in the "EE" shaped core structure to form a resonant transformer T _R1 and its exciting inductance L _m1 , and the lower magnetic legs are N ₂₁ and N ₂₂ windings are respectively wound to form a resonant transformer T _R2 and its excitation inductance L _m2 .

The integrated magnetic part that realizes the magnetic integration of the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is a resonant inductor integrated magnetic part, which is used for the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter Magnetic integration of L ₁₁ and L ₂₁ and magnetic integration of resonant inductors L ₁₂ and L ₂₂ . The iron core of the integrated magnetic parts of the resonant inductance, that is, the iron core 2 of the integrated magnetic parts of the resonant inductance L ₁₁ and L ₂₁ or the iron core 3 of the integrated magnetic parts of the resonant inductance L ₁₂ and L ₂₂ shown in Figure 1, is an "EI" shaped iron core The structure, as shown in Figure 6, includes an "E"-shaped iron core 4 and an "I"-shaped iron core 5, the "I"-shaped iron core 5 is placed on the opening side of the "E"-shaped iron core 4, and the "E"-shaped iron core 4 Air gaps are provided between the three magnetic columns and the "I" shaped iron core 5 . The upper magnetic column of the "E"-shaped iron core 4 of the resonant inductor integrated magnetic parts is wound to form a resonant inductance L ₁₁ or L ₁₂ , and the lower magnetic column is wound to form a resonant inductance L ₂₁ or L ₂₂ .

In specific implementation, the iron core 1 of the integrated magnetic parts of the resonant transformer can also adopt the "EI" shaped iron core structure shown in Figure 6, and the iron core 2 or 3 of the integrated magnetic parts of the resonant inductor can also adopt the "EE" shape shown in Figure 5. "Shaped core structure.

Embodiment two:

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, as shown in Figure 2, on the basis of Figure 1, it also includes two input capacitors C ₁ and C ₂ , the input capacitors C ₁ and C ₂ are connected in series, and the series connected The input capacitor C ₁ is connected to the two input terminals of the first bidirectional full-bridge LLC resonant converter, and the input capacitor C ₂ is connected to the two input terminals of the second bidirectional full-bridge LLC resonant converter; The two series input capacitors C ₁ and C ₂ of the bidirectional full-bridge LLC resonant converter are connected to both ends of the high-voltage DC power supply V _H , and the output terminals of the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are connected to the low-voltage DC power supply Both ends of V _L. The resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 are integrated on the core 1, the resonant inductors L ₁₁ and L ₂₁ are integrated on the core 2, and the resonant inductors L ₁₂ and L ₂₂ are integrated on the core 3 on. Thus, an interleaved series-parallel magnetically integrated bidirectional full-bridge LLC resonant converter is formed.

The integrated magnetic parts that realize the magnetic integration of the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are resonant transformer integrated magnetic parts, which are used for the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter. Magnetic integration of T _R1 and its exciting inductance L _m1 and resonant transformer T _R2 and its exciting inductance L _m2 . The iron core of the integrated magnetic parts of the resonant transformer, that is, the iron core 1 of the integrated magnetic parts of the resonant transformer T _R1 and its exciting inductance L _m1 shown in Figure 2 and the integrated magnetic parts of the resonant transformer T _R2 and its exciting inductance L _m2 , as shown in Figure 7, includes A "ten" shaped iron core 6 and two "E" shaped iron cores 4, the "ten" shaped iron core 6 is placed in the middle of the two "E" shaped iron cores 4 opposite to each other, and the center of the two "E" shaped iron cores 4 There is no air gap between the column and the left and right transverse yokes of the "ten" shaped iron core. N ₁₁ and N ₁₂ windings are wound on the upper magnetic column of the "ten"-shaped iron core 6 of the resonant transformer integrated magnetic parts to form a resonant transformer T _R1 and its exciting inductance L _m1 , and N ₂₁ and N are wound on the lower magnetic column. ₂₂ windings to form a resonant transformer T _R2 and its magnetizing inductance L _m2 .

The integrated magnetic part that realizes the magnetic integration of the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is a resonant inductor integrated magnetic part, which is used for the resonant inductance L in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter. _11. Magnetic integration of L ₂₁ and magnetic integration of resonant inductors L ₁₂ and L ₂₂ . The iron core of the resonant inductance integrated magnetic parts, that is, the iron core 2 of the integrated magnetic parts of the resonant inductance L ₁₁ and L ₂₁ or the iron core 3 of the integrated magnetic parts of the resonant inductance L ₁₂ and L ₂₂ shown in Fig. 2 also includes a piece of "ten" T-shaped iron core 6 and two pieces of "E"-shaped iron core 4, as shown in Fig. There is an air gap between the center column and the left and right yokes of the "ten"-shaped iron core, and there is an air gap between the upper or lower magnetic columns of the two "E"-shaped iron cores and the upper or lower magnetic columns of the "ten"-shaped iron core. There is an air gap. The upper magnetic column of the resonant inductor integrated magnetic component "cross" shaped core 6 is wound with a winding to form a resonant inductance L ₁₁ or L ₁₂ , and the lower magnetic column is wound with a winding to form a resonant inductance L ₂₁ or L ₂₂ .

Embodiment three:

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, as shown in Figure 3, on the basis of Figure 1, it also includes an intermediate capacitor C and two interleaved parallel magnetically integrated bidirectional Buck/Boost converters; the first bidirectional The Buck/Boost converter includes power switch tubes S ₁ , S ₂ and inductor L ₁ , the second bidirectional Buck/Boost converter includes power switch tubes S ₃ , S ₄ and inductor L ₁ ; the first bidirectional Buck/Boost converter The inductance of the converter and the inductance of the second bidirectional Buck/Boost converter are reversely magnetically coupled to form a magnetically integrated coupled inductance; the input terminals of the two bidirectional Buck/Boost converters after interleaved parallel magnetic integration are connected to the high-voltage DC power supply V Both ends of _H , the output end is connected to the intermediate capacitor C, the input end of the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is connected to both ends of the intermediate capacitor C, and the output end is connected to both ends of the low-voltage DC power supply V _L . The resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 are integrated on the iron core 1, the resonant inductance L ₁₁ and L ₂₁ are integrated on the iron core 2, and the resonant inductance L ₁₂ and L ₂₂ are integrated on the iron core 3 on. Thus, a composite interleaved series-parallel magnetic integrated bidirectional full-bridge LLC resonant converter is formed.

The integrated magnetic parts that realize the magnetic integration of the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are resonant transformer integrated magnetic parts, which are used for the resonant transformer in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter. Magnetic integration of T _R1 and its exciting inductance L _m1 and resonant transformer T _R2 and its exciting inductance L _m2 . The iron core of the integrated magnetic parts of the resonant transformer, that is, the iron core 1 of the integrated magnetic parts of the resonant transformer T _R1 and its exciting inductance L _m1 shown in Figure 3 and the integrated magnetic parts of the resonant transformer T _R2 and its exciting inductance L _m2 , as shown in Figure 9, includes A "ten"-shaped iron core 6 and two "["-shaped iron cores 7, the "ten"-shaped iron core 6 is placed in the middle of the two oppositely placed "["-shaped iron cores 7, the middle of the two "["-shaped iron cores 7 and the " There is no air gap between the left and right cross yokes of the "ten"-shaped iron core 6, and there is an air gap between the upper or lower magnetic columns of the two "["-shaped iron cores 7 and the upper or lower magnetic columns of the "ten"-shaped iron core 6. air gap. N ₁₁ and N ₁₂ windings are wound on the upper magnetic column of the "cross" shaped iron core 6 of the integrated magnetic part of the resonant transformer to form a resonant transformer T _R1 and its excitation inductance L _m1 , and N ₂₁ is wound on the lower magnetic column , N ₂₂ windings to form a resonant transformer T _R2 and its excitation inductance L _m2 ;

The integrated magnetic part that realizes the magnetic integration of the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter is a resonant inductor integrated magnetic part, which is used for the resonant inductance L in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter. _11. Magnetic integration of L ₂₁ and magnetic integration of resonant inductors L ₁₂ and L ₂₂ . The iron core of the integrated magnetic parts of the resonant inductor, that is, the iron core 2 of the integrated magnetic parts of the resonant inductors L ₁₁ and L ₂₁ shown in Figure 3 or the iron core 3 of the integrated magnetic parts of the resonant inductors L ₁₂ and L ₂₂ , as shown in Figure 10, It also includes a "ten"-shaped iron core 6 and two "["-shaped iron cores 7, the "ten"-shaped iron core 6 is placed in the middle of the two oppositely placed "["-shaped iron cores 7, and the middle part of the two "["-shaped iron cores is connected to the There is an air gap between the left and right yokes of the "ten"-shaped iron core, and there is an air gap between the upper or lower magnetic columns of the two "["-shaped iron cores 7 and the upper or lower magnetic columns of the "ten"-shaped iron core 6. air gap. The upper magnetic column of the "cross" shaped iron core 6 of the resonant inductor integrated magnetic part is wound to form a resonant inductance L ₁₁ or L ₁₂ , and the lower magnetic column is wound to form a resonant inductance L ₂₁ or L ₂₂ .

Embodiment four:

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, as shown in Figure 4, on the basis of Figure 1, it also includes an intermediate capacitor C and two interleaved parallel magnetically integrated bidirectional Buck/Boost converters; the first bidirectional The Buck/Boost converter includes power switch tubes S ₁ , S ₂ and inductor L ₁ , the second bidirectional Buck/Boost converter includes power switch tubes S ₃ , S ₄ and inductor L ₁ ; the first bidirectional Buck/Boost converter The inductance of the two-way bidirectional Buck/Boost converter and the inductance of the second bidirectional Buck/Boost converter are reversely magnetically coupled to form a magnetically integrated coupled inductance; the input terminals of the two-way bidirectional Buck/Boost converters after interleaving and parallel connection are connected in parallel with the intermediate capacitor C, and the output terminals Connected to both ends of the low-voltage DC power supply _VL , the output terminals of the two interleaved parallel bidirectional full-bridge LLC resonant converters are connected to both ends of the intermediate capacitor C, and the input terminals are connected to both ends of the high-voltage DC power supply _VH . The resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 are integrated on the core 1, the resonant inductors L ₁₁ and L ₂₁ are integrated on the core 2, and the resonant inductors L ₁₂ and L ₂₂ are integrated on the core 3 on. In this way, another composite interleaved series-parallel magnetic integrated bidirectional full-bridge LLC resonant converter is formed.

The integrated magnetic parts that realize the magnetic integration of the resonant transformer and the resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are interleaved parallel fully integrated magnetic parts, which are used for the two-way interleaved parallel bidirectional full-bridge LLC resonant converter Magnetic integration of the resonant transformer T _R1 and its exciting inductance L _m1 , the resonant transformer T _R2 and its exciting inductance L _m2 , and the four resonant inductors L ₁₁ , L ₁₂ , L ₂₁ , and L ₂₂ . The iron core of the staggered parallel fully integrated magnetic parts, as shown in Figure 11, includes two "E"-shaped iron cores 4 and two "I"-shaped iron cores 5, and the magnetic columns of the two "E"-shaped iron cores 4 are placed opposite each other to form a "EE"-shaped iron core structure, there is no air gap between the middle columns of the two "E"-shaped iron cores 4, and there are air gaps between the upper and lower magnetic columns; the two "I"-shaped iron cores 5 They are respectively vertically placed in the middle of the upper and lower windows 8 of the "EE"-shaped iron core structure. Two "E" shaped cores 4 form the core 1 of the integrated magnetic parts of the resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 shown in Figure 4, and the two "I" shaped iron cores 5 respectively constitute the core ₂ of the integrated magnetic parts of the resonant inductors L11 and L21 and the iron core ₃ of the integrated magnetic parts of the resonant inductors L12 and _L22 shown in _FIG . 4 . N ₁₁ and N ₁₂ windings are respectively wound on the upper magnetic columns of the two "E" shaped iron cores 4 of the "EE" shaped core structure to form a resonant transformer T _R1 and its exciting inductance L _m1 , and the lower magnetic columns are respectively wound Make N ₂₁ and N ₂₂ windings to form a resonant transformer T _R2 and its exciting inductance L _m2 . The magnetic fields generated by N ₁₁ and N ₁₂ windings or N ₂₁ and N ₂₂ cannot all pass through each other, and a part of each magnetic field returns through the "I" shaped iron core 5 placed in the upper or lower window 8 of the "EE" shaped iron core structure, Leakage flux with or leakage flux with Leakage inductances are formed respectively, and as resonant inductances, resonant inductances L ₁₁ and L ₁₂ or resonant inductances L ₁₂ and L ₂₂ are respectively formed.

Embodiment five:

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, as shown in Figure 1, includes two interleaved and parallel LLC resonant converters, resonant transformers and resonant inductors in the two interleaved parallel bidirectional full-bridge LLC resonant converters Integrated magnetic parts are used to realize magnetic integration; the integrated magnetic parts that realize the magnetic integration of the resonant transformer and resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are interleaved parallel fully integrated magnetic parts, which are used for two-way interleaved parallel connection The magnetic integration of resonant transformer T _R1 and its exciting inductance L _m1 , resonant transformer T _R2 and its exciting inductance L _m2 and four resonant inductors L ₁₁ , L ₁₂ , L ₂₁ , and L ₂₂ in the bidirectional full-bridge LLC resonant converter; Other structures are the same as in Embodiment 1.

The iron core of the staggered parallel fully integrated magnetic parts, as shown in FIG. 12 , includes two "E" shaped iron cores 4-1 and two "E" shaped iron cores 4-2. Two "E" shaped iron cores 4-1 form the core 1 of the integrated magnetic parts of the resonant transformer T _R1 and its exciting inductance L _m1 and the resonant transformer T _R2 and its exciting inductance L _m2 shown in Figure 1, two "E" The shaped iron core 4-2 respectively constitutes the core 2 of the integrated magnetic parts of the resonant inductors L ₁₁ and L ₂₁ and the iron core 3 of the integrated magnetic parts of the resonant inductors L ₁₂ and L ₂₂ shown in FIG. 1 . The magnetic columns of two "E" shaped iron cores 4-1 are placed opposite to each other to form an "EE" shaped iron core structure. There is no air gap between the middle columns of the two "E" shaped iron cores 4-1, and the upper magnetic columns There is an air gap between the two "E" shaped iron cores 4-1 of the "EE" shaped core structure, and N ₁₁ and N ₁₂ windings are respectively wound on the upper magnetic legs of the "EE" shaped iron core to form a resonant transformer T _R1 and its excitation inductance L _m1 , N ₂₁ and N ₂₂ windings are respectively wound on the lower magnetic column to form a resonant transformer T _R2 and its excitation inductance L _m2 . The opening direction of an "E"-shaped iron core 4-2 is placed towards the side where the "EE"-shaped iron core is wound with N ₁₁ and N ₁₂ windings. The three magnetic columns of the "E"-shaped iron core 4-2 are aligned with the There is an air gap between the upper magnetic columns of the two "E"-shaped iron cores 4-1 of the core structure; the magnetic fields generated by the N ₁₁ and N ₁₂ windings cannot pass through each other, and each has a part of the magnetic field passing through the upper "E" Shaped core 4-2 returns to form leakage flux with Therefore, the respective leakage inductances are formed as resonant inductances to form resonant inductances L ₁₁ and L ₁₂ respectively; the opening direction of the other "E"-shaped iron core 4-2 is placed towards the side where the "EE"-shaped iron core is wound with N ₂₁ and N ₂₂ windings , there is an air gap between the three magnetic columns of the "E" shaped iron core 4-2 and the lower magnetic columns of the two "E" shaped iron cores 4-1 of the "EE" shaped iron core structure; N ₂₁ and N The magnetic fields generated by the ₂₂ windings cannot all pass through each other, and each part of the magnetic field returns through the lower "E"-shaped iron core 4-2 to form a leakage flux with Therefore, leakage inductances are formed as resonant inductances respectively, and resonant inductances L ₂₁ and L ₂₂ are formed respectively.

Embodiment six:

An interleaved parallel magnetically integrated bidirectional full-bridge LLC resonant converter, as shown in Figure 2, also includes two series-connected input capacitors C ₁ , C ₂ and two interleaved parallel LLC resonant converters, two interleaved parallel bidirectional The resonant transformer and resonant inductor in the full-bridge LLC resonant converter adopt integrated magnetic parts to realize magnetic integration; the integrated magnetic parts to realize the magnetic integration of the resonant transformer and resonant inductor in the two-way interleaved parallel bidirectional full-bridge LLC resonant converter are as follows: Interleaved parallel fully integrated magnetic parts, used for resonant transformer T _R1 and its excitation inductance L _m1 , resonant transformer T _R2 and its excitation inductance L _m2 and four resonant inductors L ₁₁ in two-way interleaved parallel bidirectional full-bridge LLC resonant converter , L ₁₂ , L ₂₁ , and L ₂₂ are magnetically integrated; other structures are the same as in Embodiment 2.

The iron core of the staggered parallel fully integrated magnetic parts, as shown in Figure 13, includes three sets of "EE" shaped iron cores arranged in sequence, and two "E" shaped iron cores in each set of "EE" shaped iron cores are placed up and down, and the There are air gaps between the three magnetic columns of the two "E" shaped iron cores; the three sets of "EE" shaped iron cores are the first set of "EE" shaped iron cores, the second set of "EE" shaped iron cores and the third set of "EE" shaped iron cores from front to back. Three sets of "EE" shaped cores. The second group of iron cores constitutes the iron core 1 of the integrated magnetic parts of the resonant transformers T _R1 and T _R2 shown in Figure 1, and the first group of iron cores constitutes the iron core ₂ of the integrated magnetic parts of the resonant inductors L11 and L21 shown in Figure ₁ , The third group of iron cores constitutes the iron core 3 of the integrated magnetic parts of the resonant inductors L ₁₂ , L ₂₂ shown in FIG. 1 . N ₁₁ windings are wound on the same side magnetic column of the upper iron core 4-3 of the first group of iron core and the upper iron core 4-4 of the second group of iron core, and the lower iron core 4-4 of the second group of iron core and the third N ₁₂ windings are commonly wound on the same side of the lower core 4-5 of the group core, N ₁₁ windings and N ₁₂ windings are located on the same side, and the upper core 4-4 of the second group of "EE" shaped cores The N ₁₁ winding and the N ₁₂ winding on the lower core 4-4 form a resonant transformer T _R1 and its exciting inductance L _m1 , and the N ₁₁ winding on the upper core 4-3 of the first group of "EE" shaped cores forms a resonant inductance L ₁₁ , the N ₁₂ winding on the lower core 4-5 of the third group of "EE"-shaped cores forms a resonant inductance L ₁₂ ; the upper core 4-3 of the first group of cores and the upper core 4 of the second group of cores N 21 windings are commonly wound on the other side of the magnetic column of -4, and N ₂₁ windings are commonly wound on the other side of the magnetic column on the other side of the lower iron core 4-4 of the second group of iron cores and the lower iron core 4-5 of the third group of iron cores. ₂₂ windings, N ₂₁ windings and N ₂₂ windings are located on the same side, the N ₂₁ windings on the upper core 4-4 of the second set of "EE" shaped cores and the N ₂₂ windings on the lower core 4-4 form a resonant transformer T _R2 and its excitation inductance L _m2 , the N ₂₁ winding on the upper core 4-3 of the first group of "EE"-shaped cores forms a resonant inductance L ₂₁ , and the lower core 4-5 of the third group of "EE"-shaped cores The N ₂₂ winding forms a resonant inductor L ₂₂ .

In specific implementation, the integrated magnetic parts in the above embodiments are not limited to the applied embodiments, and can be applied to the resonant transformer and resonant inductor in the interleaved parallel magnetic integrated bidirectional full-bridge LLC resonant converter in other embodiments magnetic integration. The "E"-shaped iron core, "I"-shaped iron core, "ten"-shaped iron core and "["-shaped iron core in each integrated magnetic part are usually made of ferrite, silicon steel sheet, iron-silicon, metal magnetic powder core, amorphous, super Microcrystalline and other magnetic materials, the N ₁₁ , N ₁₂ , N ₂₁ , N ₂₂ windings forming the resonant transformer and the windings forming the resonant inductors L ₁₁ , L ₁₂ , L ₂₁ , L ₂₂ usually use copper wires with an outer insulation layer, Copper foil, aluminum wire or aluminum foil.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope defined by the claims of the present invention .

Claims (10)

1. a kind of crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter, it is characterised in that：It is double including two-way crisscross parallel To full-bridge LLC resonant converter, resonance transformer and the resonance electricity in the two-way full-bridge LLC resonant converter of two-way crisscross parallel Sense realizes that magnetic is integrated using integrated magneticses；The two-way full-bridge LLC resonant converter of the first via includes the first primary circuit, the first secondary Circuit and resonance transformer T_R1And its magnetizing inductance L_m1；First primary circuit includes power switch tube S₁₁~S₁₄, resonant inductance L₁₁With resonant capacitance C₁₁；First secondary circuit includes power switch tube S₁₅~S₁₈, resonant inductance L₁₂With resonant capacitance C₁₂；Second The two-way full-bridge LLC resonant converter in road includes the second primary circuit, the second secondary circuit and resonance transformer T_R2And its excitation electricity Sense L_m2；Second primary circuit includes power switch tube S₂₁~S₂₄, resonant inductance L₂₁With resonant capacitance C₂₁；Second secondary circuit bag Include power switch tube S₂₅~S₂₈, resonant inductance L₂₂With resonant capacitance C₂₂；Primary side electricity per the two-way full-bridge LLC resonant converter in road Road and secondary circuit use full-bridge type LLC resonance circuits, realize two-way circulating for energy.

2. crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter according to claim 1, it is characterised in that：It is described Crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter also includes two input capacitance C₁And C₂, input capacitance C₁And C₂String Connection, the input capacitance C after series connection₁It is connected to two inputs of the two-way full-bridge LLC resonant converter of the first via, input capacitance C₂ It is connected to two inputs of the two-way full-bridge LLC resonant converter in the second tunnel.

3. crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter according to claim 1, it is characterised in that：It is described Crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter also includes intermediate capacitance C and integrated two-way of two-way crisscross parallel magnetic Buck/Boost converters；The inductance L of the two-way Buck/Boost converters of the first via₁Buck/Boost conversion two-way with the second tunnel The inductance L of device₂Reverse magnetic coupling is carried out, the integrated coupling inductance of magnetic is formed；Two-way Buck/Boost converters after crisscross parallel Output end it is in parallel with intermediate capacitance C, the input of the two-way full-bridge LLC resonant converter of the two-way crisscross parallel is all connected with At the two ends of intermediate capacitance C.

4. crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter according to claim 1, it is characterised in that：It is described Crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter also includes intermediate capacitance C and integrated two-way of two-way crisscross parallel magnetic Buck/Boost converters；The inductance L of the two-way Buck/Boost converters of the first via₁Buck/Boost conversion two-way with the second tunnel The inductance L of device₂Reverse magnetic coupling is carried out, the integrated coupling inductance of magnetic is formed；Two-way Buck/Boost converters after crisscross parallel Input it is in parallel with intermediate capacitance C, the output end of the two-way full-bridge LLC resonant converter of the two-way crisscross parallel is all connected with At the two ends of intermediate capacitance C.

5., according to the crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter that any one of claim 1-4 is described, it is special Levy and be：Realize integrated integrated of resonance transformer magnetic in the two-way full-bridge LLC resonant converter of the two-way crisscross parallel Magnetic part is resonance transformer integrated magneticses, for the resonance transformation in the two-way full-bridge LLC resonant converter of two-way crisscross parallel Device T_R1And its magnetizing inductance L_m1With resonance transformer T_R2And its magnetizing inductance L_m2Magnetic it is integrated；Realize the two-way crisscross parallel Two-way full-bridge LLC resonant converter in the integrated integrated magneticses of resonant inductance magnetic be resonant inductance integrated magneticses, for two Resonant inductance L in the two-way full-bridge LLC resonant converter of road crisscross parallel₁₁、L₂₁Magnetic it is integrated, and resonant inductance L₁₂、L₂₂'s Magnetic is integrated；

The iron core of the resonance transformer integrated magneticses is " EE " shape core construction, including relative " E " shape of two panels magnetic pole is unshakable in one's determination, There is no air gap between two panels " E " shape center pillar unshakable in one's determination, air gap is equipped with and the magnetic pole of downside between the magnetic pole of upside；" EE " Distinguish coiling N in two panels " E " shape upside magnetic pole unshakable in one's determination in shape core construction₁₁、N₁₂Winding is forming resonance transformer T_R1And its Magnetizing inductance L_m1, coiling N is distinguished in the magnetic pole of downside₂₁、N₂₂Winding is forming resonance transformer T_R2And its magnetizing inductance L_m2；

The iron core of the resonant inductance integrated magneticses is " EI " shape core construction, including a piece of " E " shape " I " shape iron unshakable in one's determination and a piece of The heart, " I " shape iron core is positioned over " E " shape open side unshakable in one's determination, is equipped between " E " shape three magnetic poles unshakable in one's determination and " I " shape iron core Air gap；Coiling winding is forming resonant inductance L in " E " shapes of resonant inductance integrated magneticses upside magnetic pole unshakable in one's determination₁₁Or L₁₂, coiling winding is forming resonant inductance L in the magnetic pole of downside₂₁Or L₂₂。

6., according to the crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter that any one of claim 1-4 is described, it is special Levy and be：Realize integrated integrated of resonance transformer magnetic in the two-way full-bridge LLC resonant converter of the two-way crisscross parallel Magnetic part is resonance transformer integrated magneticses, for the resonance transformation in the two-way full-bridge LLC resonant converter of two-way crisscross parallel Device T_R1And its magnetizing inductance L_m1With resonance transformer T_R2And its magnetizing inductance L_m2Magnetic it is integrated；Realize the two-way crisscross parallel Two-way full-bridge LLC resonant converter in the integrated integrated magneticses of resonant inductance magnetic be resonant inductance integrated magneticses, for two Resonant inductance L in the two-way full-bridge LLC resonant converter of road crisscross parallel₁₁、L₂₁Magnetic it is integrated, and resonant inductance L₁₂、L₂₂'s Magnetic is integrated；

The iron core of the unshakable in one's determination and resonant inductance integrated magneticses of the resonance transformer integrated magneticses is including a piece of " ten " font Unshakable in one's determination and two panels " E " shape core construction unshakable in one's determination, it is unshakable in one's determination middle that " ten " shaped iron core is placed on relative " E " shape of two panels magnetic pole；

The horizontal yoke in left and right two of two panels " E " shape of resonance transformer integrated magneticses center pillar unshakable in one's determination and its " ten " shaped iron core Between there is no an air gap, two panels " E " shapes of resonance transformer integrated magneticses up or down side magnetic pole unshakable in one's determination and its " ten " font Air gap is provided between up or down side magnetic pole unshakable in one's determination；The upside magnetic pole of " ten " shaped iron core of the resonance transformer integrated magneticses Upper coiling N respectively₁₁、N₁₂Winding is forming resonance transformer T_R1And its magnetizing inductance L_m1, coiling N is distinguished in the magnetic pole of downside₂₁、N₂₂ Winding is forming resonance transformer T_R2And its magnetizing inductance L_m2；

The horizontal yoke in left and right two of two panels " E " shapes of resonant inductance integrated magneticses center pillar unshakable in one's determination and its " ten " shaped iron core it Between be provided with air gap, two panels " E " shapes of resonant inductance integrated magneticses up or down side magnetic pole unshakable in one's determination and its " ten " shaped iron core Up or down side magnetic pole between be provided with air gap；Coiling in the upside magnetic pole of " ten " shaped iron core of the resonant inductance integrated magneticses Winding is forming resonant inductance L₁₁Or L₁₂, coiling winding is forming resonant inductance L in the magnetic pole of downside₂₁Or L₂₂。

7., according to the crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter that any one of claim 1-4 is described, it is special Levy and be：Realize integrated integrated of resonance transformer magnetic in the two-way full-bridge LLC resonant converter of the two-way crisscross parallel Magnetic part is resonance transformer integrated magneticses, for the resonance transformation in the two-way full-bridge LLC resonant converter of two-way crisscross parallel Device T_R1And its magnetizing inductance L_m1With resonance transformer T_R2And its magnetizing inductance L_m2Magnetic it is integrated；Realize the two-way crisscross parallel Two-way full-bridge LLC resonant converter in the integrated integrated magneticses of resonant inductance magnetic be resonant inductance integrated magneticses, for two Resonant inductance L in the two-way full-bridge LLC resonant converter of road crisscross parallel₁₁、L₂₁Magnetic it is integrated, and resonant inductance L₁₂、L₂₂'s Magnetic is integrated；

The iron core of the unshakable in one's determination and resonant inductance integrated magneticses of the resonance transformer integrated magneticses is including a piece of " ten " font Unshakable in one's determination and two panels " [" shape core construction unshakable in one's determination, " ten " shaped iron core be placed on two panels opening it is relative " [" shape it is unshakable in one's determination in the middle of；

Two panels " the horizontal yoke in left and right two of [" shape middle part unshakable in one's determination and its " ten " shaped iron core of the resonance transformer integrated magneticses Between there is no an air gap, two panels " [" shape up or down side magnetic pole unshakable in one's determination and its " ten " font of the resonance transformer integrated magneticses Air gap is provided between up or down side magnetic pole unshakable in one's determination；The upside magnetic pole of " ten " shaped iron core of the resonance transformer integrated magneticses Upper coiling N₁₁、N₁₂Winding is forming resonance transformer T_R1And its magnetizing inductance L_m1, coiling N in the magnetic pole of downside₂₁、N₂₂Winding is with shape Into resonance transformer T_R2And its magnetizing inductance L_m2；

The resonant inductance integrated magneticses two panels " the horizontal yoke in left and right two of [" shape middle part unshakable in one's determination and its " ten " shaped iron core it Between be provided with air gap, two panels " [" shape up or down side magnetic pole unshakable in one's determination and its " ten " shaped iron core of the resonant inductance integrated magneticses Up or down side magnetic pole between be provided with air gap；Coiling in the upside magnetic pole of " ten " shaped iron core of the resonant inductance integrated magneticses Winding is forming resonant inductance L₁₁Or L₁₂, coiling winding is forming resonant inductance L in the magnetic pole of downside₂₁Or L₂₂。

8., according to the crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter that any one of claim 1-4 is described, it is special Levy and be：Realize the resonance transformer and resonant inductance magnetic in the two-way full-bridge LLC resonant converter of the two-way crisscross parallel Integrated integrated magneticses are the fully integrated magnetic part of crisscross parallel, in the two-way full-bridge LLC resonant converter of two-way crisscross parallel Resonance transformer T_R1And its magnetizing inductance L_m1, resonance transformer T_R2And its magnetizing inductance L_m2With four resonant inductance L₁₁、L₁₂、 L₂₁、L₂₂Magnetic it is integrated；

The iron core of the fully integrated magnetic part of crisscross parallel includes that two panels " E " shape is unshakable in one's determination and two panels " I " shape is unshakable in one's determination, two panels " E " shape iron The magnetic pole of the heart is staggered relatively, forms " EE " shape core construction, does not have air gap, upside magnetic between two panels " E " shape center pillar unshakable in one's determination Air gap is equipped between the magnetic pole of between post and downside；Two panels " I " shape iron core is vertically arranged in the upper of " EE " the shape core construction respectively In the middle of lower two windows；Distinguish coiling N in two panels " E " shape of " EE " shape core construction upside magnetic pole unshakable in one's determination₁₁、N₁₂Around Group is forming resonance transformer T_R1And its magnetizing inductance L_m1, coiling N is distinguished in the magnetic pole of downside₂₁、N₂₂Winding is forming resonance transformation Device T_R2And its magnetizing inductance L_m2；N₁₁And N₁₂Winding or N₂₁And N₂₂The magnetic field that winding is produced can not mutually all by other side, respectively Returned by the way that " I " shape being placed in described " EE " shape core construction top or lower window is unshakable in one's determination from some magnetic field, shape Into leakage magnetic fluxWithOr leakage magnetic fluxWithEach self-forming leakage inductance forms resonant inductance L respectively as resonant inductance₁₁With L₁₂Or resonant inductance L₂₁And L₂₂。

9., according to the crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter that any one of claim 1-4 is described, it is special Levy and be：Realize the resonance transformer and resonant inductance magnetic in the two-way full-bridge LLC resonant converter of the two-way crisscross parallel Integrated integrated magneticses are the fully integrated magnetic part of crisscross parallel, in the two-way full-bridge LLC resonant converter of two-way crisscross parallel Resonance transformer T_R1And its magnetizing inductance L_m1, resonance transformer T_R2And its magnetizing inductance L_m2With four resonant inductance L₁₁、L₁₂、 L₂₁、L₂₂Magnetic it is integrated；

The iron core of the fully integrated magnetic part of crisscross parallel includes that four " E " shapes are unshakable in one's determination, and wherein two panels " E " shape magnetic pole unshakable in one's determination is relative Place, form " EE " shape core construction, there is no air gap between two panels " E " shape center pillar unshakable in one's determination, between the magnetic pole of upside and downside Air gap is equipped between magnetic pole；Distinguish coiling N in two panels " E " shape of " EE " shape core construction upside magnetic pole unshakable in one's determination₁₁、 N₁₂Winding is forming resonance transformer T_R1And its magnetizing inductance L_m1, coiling N is distinguished in the magnetic pole of downside₂₁、N₂₂Winding is humorous to be formed Shake transformer T_R2And its magnetizing inductance L_m2；3rd " E " shape opening direction direction " EE " shape iron core coiling N unshakable in one's determination₁₁、N₁₂Around The side of group is placed, should three unshakable in one's determination magnetic poles of " E " shape and " EE " shape two panels " E " shape unshakable in one's determination upside magnetic pole unshakable in one's determination it Between be equipped with air gap；N₁₁Winding and N₁₂The magnetic field that winding is produced can not mutually all by other side, and respective some magnetic field leads to Cross the 3rd " E " shape magnetic pole unshakable in one's determination to return, form leakage magnetic fluxWithEach self-forming leakage inductance is used as resonant inductance, difference shape Into resonant inductance L₁₁And L₁₂；4th opening direction direction " EE " shape iron core coiling N of " E " shaped iron core₂₁、N₂₂The one of winding Side is placed, and should be all provided between " E " shape three magnetic poles unshakable in one's determination downside magnetic pole unshakable in one's determination with " EE " shape two panels " E " shape unshakable in one's determination There is air gap；N₂₁Winding and N₂₂The magnetic field that winding is produced can not mutually all by other side, and respective some magnetic field passes through the 4th Piece " E " shape magnetic pole unshakable in one's determination is returned, and forms leakage magnetic fluxWithEach self-forming leakage inductance forms resonance respectively as resonant inductance Inductance L₂₁And L₂₂。

10. according to the crisscross parallel magnetic integrated bi-directional full-bridge LLC resonant converter that any one of claim 1-4 is described, its It is characterised by：Realize the resonance transformer and resonant inductance in the two-way full-bridge LLC resonant converter of the two-way crisscross parallel The integrated integrated magneticses of magnetic are the fully integrated magnetic part of crisscross parallel, for the two-way full-bridge LLC resonant converter of two-way crisscross parallel In resonance transformer T_R1And its magnetizing inductance L_m1, resonance transformer T_R2And its magnetizing inductance L_m2With four resonant inductance L₁₁、 L₁₂、L₂₁、L₂₂Magnetic it is integrated；

The iron core of the fully integrated magnetic part of crisscross parallel includes that " EE " shape being arranged in order before and after three groups is unshakable in one's determination, every group of " EE " shape iron Two panels " E " shape iron core in the heart is placed up and down, and air gap is equipped between two panels " E " shape placed up and down three magnetic poles unshakable in one's determination；Three Group " EE " shape iron core is followed successively by first group of " EE " shape unshakable in one's determination, second group of " EE " shape iron core and the 3rd group of " EE " shape iron from front to back The heart；In the same side magnetic pole of described first group of " EE " shape upper piece iron core unshakable in one's determination and second group of " EE " shape upper piece iron core unshakable in one's determination altogether With coiling N₁₁Winding, second group of the same side magnetic pole that " EE " shape iron core bottom sheet is unshakable in one's determination and the 3rd group of " EE " shape bottom sheet unshakable in one's determination is unshakable in one's determination Upper common coiling N₁₂Winding, N₁₁Winding and N₁₂Winding is located at the same side, the N on second group of " EE " shape upper piece iron core unshakable in one's determination₁₁Around N in group and bottom sheet iron core₁₂Winding forms resonance transformer T_R1And its magnetizing inductance L_m1, first group of " EE " shape it is unshakable in one's determination upper piece N on iron core₁₁Winding forms resonant inductance L₁₁, the N on the 3rd group of bottom sheet iron core of " EE " shape iron core₁₂Winding forms resonance electricity Sense L₁₂；In the opposite side magnetic pole of first group of " EE " shape upper piece iron core unshakable in one's determination and second group of " EE " shape upper piece iron core unshakable in one's determination together about N processed₂₁Winding, in second group of opposite side magnetic pole of " EE " shape iron core bottom sheet bottom sheet iron core unshakable in one's determination with the 3rd group of " EE " shape unshakable in one's determination altogether With coiling N₂₂Winding, N₂₁Winding and N₂₂Winding is located at the same side, the N on second group of " EE " shape upper piece iron core unshakable in one's determination₂₁Winding and N on bottom sheet iron core₂₂Winding forms resonance transformer T_R2And its magnetizing inductance L_m2, first group of " EE " shape upper piece iron core unshakable in one's determination On N₂₁Winding forms resonant inductance L₂₁, the N on the 3rd group of bottom sheet iron core of " EE " shape iron core₂₂Winding forms resonant inductance L₂₂。