WO2024217826A1 - Transformateur et dispositif électrique doté d'un transformateur - Google Patents

Transformateur et dispositif électrique doté d'un transformateur Download PDF

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Publication number
WO2024217826A1
WO2024217826A1 PCT/EP2024/057942 EP2024057942W WO2024217826A1 WO 2024217826 A1 WO2024217826 A1 WO 2024217826A1 EP 2024057942 W EP2024057942 W EP 2024057942W WO 2024217826 A1 WO2024217826 A1 WO 2024217826A1
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WIPO (PCT)
Prior art keywords
gap
coil
transformer
secondary coil
axial direction
Prior art date
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Ceased
Application number
PCT/EP2024/057942
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German (de)
English (en)
Inventor
Samir EL AJLAOUI
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TDK Electronics AG
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TDK Electronics AG
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Priority to JP2025560344A priority Critical patent/JP2026512493A/ja
Publication of WO2024217826A1 publication Critical patent/WO2024217826A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/02—Coils wound on non-magnetic supports, e.g. formers
    • H01F2005/022—Coils wound on non-magnetic supports, e.g. formers wound on formers with several winding chambers separated by flanges, e.g. for high voltage applications
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/01—Resonant DC/DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/22—Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC
    • H02M3/325—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • a transformer and an electrical device with a transformer are specified.
  • So-called LLC converters are widely used as DC-DC converters in various applications, for example in connection with chargers for electric vehicles, because they can have a high power density and a high level of efficiency and at the same time can be cost-effective.
  • an LLC converter in a charger application is connected to a direct current source such as a rectifier, an intermediate circuit element, also known as a DC link, or a battery, and is used to generate a direct current required for a battery connected on the output side.
  • An LLC converter usually has a transformer between an inverter and a rectifier, which in LLC topologies is connected in series with an additional inductance and a capacitor. It can be advantageous here if the leakage inductance of the transformer is used as the additional inductance instead of an additional component.
  • the transformer must be designed with a high leakage inductance.
  • the requirement for high leakage inductance values can be met by a two-chamber winding, in which the primary and secondary windings are located in two different chambers separated by a partition. Stranded wires can be used to reduce additional losses. A further reduction in additional losses is difficult, however, if at the same time a high
  • At least one object of certain embodiments is to specify a transformer. At least another object of certain embodiments is to specify an electrical device with a transformer.
  • a transformer has a primary coil, a first secondary coil unit and a second secondary coil unit.
  • an electrical device comprises such a transformer.
  • the transformer has a three-chamber structure, also referred to as a three-chamber winding.
  • a three-chamber winding can reduce losses compared to a two-chamber winding, it usually also reduces the leakage inductance, which, in view of what was said at the beginning, is advantageous in avoiding additional inductance in Series to the transformer appears counterproductive. Increasing the number of windings could increase the leakage inductance, but this would also increase the main inductance. However, it has been shown that a transformer with the desired properties can be achieved using the features and designs described below.
  • the first secondary coil unit, the primary coil and the second secondary coil unit are arranged one after the other along an axial direction.
  • the axial direction can in particular be defined by a winding axis around which the windings of the primary coil, the first secondary coil unit and the second secondary coil unit are wound.
  • the first secondary coil unit, the primary coil and the second secondary coil unit can, for example, have a round winding cross-section, such as a circular one, or a polygonal winding cross-section, such as a square or hexagonal winding cross-section, wherein the winding cross-section is viewed perpendicular to the axial direction.
  • Directions perpendicular to the axial direction are referred to as radial directions.
  • the primary coil is arranged between the first secondary coil unit and the second secondary coil unit.
  • the first secondary coil unit and the second secondary coil unit can thus be arranged opposite one another in the axial direction from the primary coil.
  • the first and second secondary coil units can be connected in series and thus together form a secondary coil.
  • the series connection can, for example, be formed in the transformer itself, so that for external Contacting the secondary coil can be provided with exactly two connections on the transformer.
  • each of the first and second secondary coil units can have two connections for external contacting, so that the series connection can be achieved, for example, by an external connection of a connection of the first secondary coil unit and a connection of the second secondary coil unit.
  • Each of the primary coil, the first secondary coil unit and the second secondary coil unit can, for example, be arranged in a chamber of a coil carrier, resulting in the three-chamber structure. Between the primary coil and the first secondary coil unit there is a first coil gap along the axial direction, which defines a first coil spacing. Between the primary coil and the second secondary coil unit there is a second coil gap along the axial direction, which defines a second coil spacing.
  • the first secondary coil unit and the second secondary coil unit are each arranged at a distance from the primary coil.
  • a first partition wall can be arranged between the primary coil and the first secondary coil unit and a second partition wall can be arranged between the primary coil and the second secondary coil unit, each of which is part of a coil carrier.
  • the partition walls can each have a partition wall thickness that has the size of the first and second coil gaps and can thus determine the first and second coil spacing.
  • the first coil spacing and the second coil spacing may be equal.
  • the transformer has a magnetic core.
  • the magnetic core can preferably be made up of several parts, i.e. can have several parts made of a ferromagnetic material. The several parts can be partially or all firmly connected to one another in the transformer, for example by gluing or another material connection.
  • the magnetic core has a central core part, which can be formed from one or preferably from several parts.
  • the central core part is inserted into the primary coil, the first secondary coil unit and the second secondary coil unit, so that the primary coil, the first secondary coil unit and the second secondary coil unit each surround a part of the central core part in the radial direction.
  • the central core part can have a central gap that is arranged along the axial direction between a first gap and a second gap.
  • the central core part can have three gaps that are arranged one above the other along the axial direction.
  • the gaps i.e. the middle gap as well as the first gap and the second gap, can particularly preferably separate four parts, formed from a ferromagnetic material, of the magnetic core and in particular of the central core part from one another in the axial direction.
  • the middle gap is arranged symmetrically to the primary coil in the axial direction.
  • the primary coil can thus extend in the axial direction and have a height in the axial direction, wherein the middle gap, in particular a center of the middle gap, is arranged along the axial direction at half the height of the primary coil.
  • the first gap and the second gap may be arranged symmetrically to the central gap along the axial direction. In other words, the first and second gaps may be equidistant from the central gap along the axial direction.
  • the middle gap, the first gap and the second gap are particularly preferably filled with a non-ferromagnetic material which, for example, comprises or is made of air, a plastic and/or a ceramic material.
  • the middle gap can be filled with air.
  • the first and second gaps can be filled with a non-ferromagnetic material which, for example, comprises or is made of a plastic and/or a ceramic material.
  • the material filling the first and second gaps can, in particular, permanently connect two parts of the central core part to one another.
  • the magnetic core can therefore, for example, be formed from two units which each have two parts of the central core part. The two units can be inserted from sides lying opposite one another in the axial direction into the primary coil and the first or second secondary coil unit with the respective part of the central core part, the middle gap being formed after complete insertion.
  • the first gap and the first coil gap have an identical first position in the axial direction and the second gap and the second coil gap have an identical second position in the axial direction, so that the first gap is surrounded in the radial direction by the first coil gap and the second gap is surrounded in the radial direction by the second coil gap.
  • the first gap has a first gap width and the second gap has a second gap width.
  • the middle gap can have a third gap width.
  • the gap widths, i.e. the sizes of the gaps, are measured in the axial direction.
  • the first gap and the second gap are preferably the same size.
  • the first gap width and the second gap width can therefore preferably be the same size.
  • the middle gap is preferably larger than the first gap and larger than the second gap, so that the third gap width can accordingly be larger than the first gap width and larger than the second gap width.
  • the first coil spacing can be greater than or equal to the first gap width and the second coil spacing can be greater than or equal to the second gap width.
  • the first coil spacing can be greater than the first gap width and the second coil spacing can be greater than the second gap width. If, as described above, there is a partition between the primary coil and each of the first and second secondary coil units, this can mean in particular that the partitions each have a partition thickness, measured in the axial direction, which is at least equal to and preferably greater than the respective adjacent gap width in the radial direction.
  • a ratio of the first coil spacing to the first gap width can thus be greater than or equal to 1 and a ratio of the second coil spacing to the second gap width can also be greater than or equal to 1.
  • the two ratios are each greater than or equal to 1.1 or greater than or equal to 1.5 or greater than or equal to 2.
  • the primary coil can have a number of windings NI.
  • the first secondary coil unit and the second secondary coil unit are preferably constructed in the same way and can in particular have the same number of windings N2.
  • NI>N2 can apply.
  • 1.3 ⁇ N1/N2 ⁇ 4 can apply.
  • NI can be, for example, greater than or equal to 12 and less than or equal to 20 or less than or equal to 25 or less than or equal to 30.
  • N2 can be, for example, greater than or equal to 6 and less than or equal to 10.
  • the three-chamber structure of the transformer described here reduces losses compared to conventional two-chamber solutions and at the same time achieves high leakage inductance. This can be achieved in particular by the described combination of the three-chamber structure with a targeted arrangement and design of the gaps and coil gaps.
  • the number of windings of the primary coil in the transformer described here is increased, while the number of windings of the secondary coil units is reduced.
  • the higher main inductance caused by the increase in the number of windings of the primary coil can be compensated for by the so-called distributed gap formed by the central gap, the first gap and the second gap.
  • the coil gaps and thus the partitions between the primary coil and the first and second secondary coil units are arranged exactly above the first and second gaps and the partition thicknesses and thus coil spacings are at least as large and preferably larger than the gap widths of the first and second gaps.
  • Large partition thicknesses have the advantage that the windings of the Coils are further away from the magnetic field exiting the gap, which can reduce additional losses. Also, the windings are removed from the stray field that does not contribute to the main inductance, which can lead to a further reduction in additional losses.
  • the transformer is part of a resonance element of an electrical device.
  • the resonance element can particularly preferably be connected to an inverter unit on the input side and a rectifier unit on the output side.
  • the resonance element can also be referred to as a "resonant tank".
  • the electrical device which can be designed as a DC-DC converter, for example, can thus have the resonance element between the inverter unit and the rectifier unit.
  • the transformer can preferably form the resonance element together with at least one capacitor or exactly one capacitor.
  • the resonance element can be free of further induction components apart from the transformer. Accordingly, apart from the transformer, there can be no further induction component such as a coil or choke between the output of the inverter element and the input of the rectifier element, but only one or more capacitors and/or one or more resistors.
  • Figure 1 shows a schematic representation of a transformer according to an embodiment
  • Figures 2A and 2B show schematic representations of a transformer according to a further embodiment
  • Figures 3A and 3B show results of a simulation of the field distribution in a transformer according to a further embodiment
  • Figure 4 shows results of a simulation of the field distribution in a transformer according to a comparative example
  • Figure 5 shows a schematic representation of an electrical device with a transformer according to a further embodiment.
  • identical, similar or similarly acting elements can each be provided with the same reference symbols.
  • the elements shown and their relative sizes to one another are not to be regarded as being to scale; rather, individual elements, such as layers, components, structural elements and areas, can be shown exaggeratedly large for better representation and/or better understanding.
  • FIG. 1 shows an exemplary embodiment of a transformer 100.
  • the transformer 100 has a three-chamber structure with a primary coil 11 and a secondary coil divided into a first secondary coil unit 21 and a second secondary coil unit 22, which are arranged in succession along an axial direction 91.
  • the axial direction 91 is defined by the winding axis 90 indicated by dashed lines, around which the windings of the primary coil 11, the first secondary coil unit 21 and the second secondary coil unit 22 are wound.
  • Directions perpendicular to the axial direction 91 are referred to as the radial direction 92.
  • the first secondary coil unit 21, the primary coil 11 and the second secondary coil unit 22 are arranged on a coil carrier 3 and can, for example, have a round winding cross-section such as a circular winding cross-section or a polygonal winding cross-section such as a square or hexagonal winding cross-section, wherein the winding cross-section is seen perpendicular to the axial direction 91.
  • Each of the primary coil 11, the first secondary coil unit 21 and the second secondary coil unit 22 is arranged in a chamber 30 of the coil body 3.
  • the primary coil 11 is arranged along the axial direction 91 between the first secondary coil unit 21 and the second secondary coil unit 22, so that the first secondary coil unit 21 and the second secondary coil unit 22 are arranged opposite one another in the axial direction 91 as seen from the primary coil 11.
  • the first and second secondary coil units 21, 22 can be connected in series by means of a suitable internal connection and thus form the secondary coil.
  • Two connections 29 are provided on the transformer for external contacting of the secondary coil.
  • the primary coil 11 can be contacted from the outside via connections 19.
  • first coil gap 41 along the axial direction 91, which has a first coil distance Dl defined, present.
  • second coil gap 42 which defines a second coil spacing D2 is present along the axial direction 91.
  • the first coil gap 41 is defined in the exemplary embodiment shown by a first partition 31 of the coil carrier 3 and the second coil gap 42 is defined by a second partition 32 of the coil carrier 3.
  • the partitions 31, 32 each have a partition thickness along the axial direction which determines the size of the first and second coil gaps 41, 42 and thus the first and second coil spacing D1, D2.
  • the first coil spacing D1 and the second coil spacing D2 can be the same.
  • the first secondary coil unit 21 and the second secondary coil unit 22 can preferably have the same number of windings.
  • the first and second secondary coil units 21, 22 can be arranged and designed symmetrically to the primary coil 11.
  • the primary coil 11 has a number of windings NI, while the first secondary coil unit 21 and the second secondary coil unit 22 each have a number of windings N2.
  • the arrangement of the windings shown is to be understood purely as an example.
  • NI>N2 is particularly preferred.
  • 1.3 ⁇ N1/N2 ⁇ 4 can apply.
  • NI can be, for example, greater than or equal to 12 and less than or equal to 20.
  • N2 can be, for example, greater than or equal to 6 and less than or equal to 10.
  • NI can be, for example, equal to 13 and N2 can be, for example, equal to 8.
  • the transformer 100 has a magnetic core
  • the magnetic core 5 which is inserted into the coil carrier 3.
  • the magnetic core 5 can preferably be designed in several parts , i.e. have several parts 51, 52, 53, 54 made of a ferromagnetic material.
  • the several parts 51, 52, 53, 54 made of a ferromagnetic material.
  • the magnetic core 5 has a central core part 50 or, as in the embodiment shown, is formed by the central core part 50, which accordingly consists of the several parts 51, 52,
  • the central core part 50 is inserted into the primary coil 11, the first secondary coil unit 21 and the second secondary coil unit 22, so that the primary coil 11, the first secondary coil unit 21 and the second secondary coil unit 22 each surround the central core part 50 in the radial direction 92.
  • the central core part 50 has three gaps 61, 62, 63 that follow one another along the axial direction 91.
  • the central core part 50 has a first gap 61, a second gap 62 and a middle gap 63, so that the magnetic core 5 is a core with a distributed gap.
  • the middle gap 63 is arranged between the first gap 61 and the second gap 62 along the axial direction 91.
  • the gaps 61, 62, 63 separate the four parts 51, 52, 53, 54 of the magnetic core 5 and in particular of the central core part 50.
  • the middle gap 53 is arranged in the axial direction 91 symmetrically to the primary coil 11.
  • the primary coil 11 has a height in the axial direction 91 and the middle gap 63, in particular a center of the middle gap 63 along the axial direction 91, is arranged halfway up the primary coil 11.
  • the first Gap 61 and the second gap 62 are arranged symmetrically to the central gap 63 along the axial direction 91, so that the first and second gaps 61, 62 are equidistant from the central gap 63 along the axial direction 91.
  • the first gap 61, the second gap 62 and the middle gap 63 are particularly preferably filled with a non-ferromagnetic material, for example selected from air, a plastic and a ceramic material.
  • the first gap 61 and the first coil gap 41 have an identical first position in the axial direction 91.
  • the second gap 62 and the second coil gap 42 have an identical second position in the axial direction 91, so that the first gap 61 is surrounded by the first coil gap 41 in the radial direction 92 and the second gap 62 is surrounded by the second coil gap 42 in the radial direction 92.
  • the first partition wall 31 covers the first gap 61 and the second partition wall 32 covers the second gap 62.
  • the first gap 61 has a first gap width S 1 and the second gap 62 has a second gap width S2 .
  • the middle gap 63 has a third gap width S3 , wherein the gap widths S 1 , S2 , S3 are measured in the axial direction 91 .
  • the first and second gaps 61, 62 and thus the first gap width S 1 and the second gap width S2 are preferably the same size.
  • the middle gap 63 is preferably larger than the first gap 61 and larger than the second gap 62 , so that accordingly the third gap width S3 is larger than the first gap width S 1 and larger than the second gap width S2 .
  • the middle gap 63 can have a third gap width S3 that is greater than or equal to 0.5 mm and less than or equal to 2 mm.
  • the first coil spacing Dl is greater than or equal to the first gap width S1 and the second coil spacing D2 is greater than or equal to the second gap width S2.
  • the first coil spacing Dl is greater than the first gap width S1, as indicated in Figure 1
  • the second coil spacing D2 is greater than the second gap width S2.
  • the first and second partition walls 31, 32 each have a partition wall thickness, measured in the axial direction 91, which is at least equal to or, as shown, preferably greater than the gap width SI, S2 of the respectively adjacent gap 61, 62.
  • a ratio Dl/Sl of the first coil spacing Dl to the first gap width S1 can thus be greater than or equal to 1 and a ratio D2/S2 of the second coil spacing D2 to the second gap width S2 can also be greater than or equal to 1.
  • the two ratios Dl/Sl and D2/S2 are each greater than or equal to 1.1 or greater than or equal to 1.5 or greater than or equal to 2.
  • Figures 2A and 2B show a further embodiment of the transformer 100.
  • Figure 2A shows a three-dimensional view of a mounting side of the transformer 100
  • Figure 2B shows a two-dimensional sectional view of the transformer 100 with a cutting plane that runs along the axial direction 91 and is essentially perpendicular to the paper plane of the illustration shown in Figure 2A.
  • the coil axis 90 is indicated in Figure 2B.
  • the embodiment shown in Figures 2A and 2B is a modification of the embodiment shown in Figure 1, so that the following description essentially refers to the differences from the embodiment of Figure 1. Elements that are not provided with reference numerals and/or which are not explained, can be designed as described in connection with Figure 1.
  • the transformer 100 has a housing 1 which is designed like a cap and surrounds the other elements of the transformer 100 at least on the sides other than the mounting side.
  • the coil carrier 3 with the primary coil 11, the first secondary coil unit 21 and the second secondary coil unit 22 and the magnetic core 5, which form a structural unit after being joined together are inserted into the housing 1. Gaps between the inserted components and the housing 1 can be filled with a plastic material 2, for example a non-ferromagnetic resin, and fix the inserted components in the housing 1.
  • the plastic material 2 can form the partition walls between the primary coil 11 and the first and second secondary coil units 21, 22 at least in partial areas, while in other partial areas parts of the coil carrier 3 form the partition walls 31, 32.
  • each of the first and second secondary coil units 21, 22 has two connections 29 for external contacting.
  • the series connection of the first and second secondary coil units 21, 22 described in connection with Figure 1 can in this case be achieved by an external connection of one of the connections 29 of the first secondary coil unit 21 and one of the connections 29 of the second secondary coil unit 22.
  • the primary coil 11 has a number of windings NI of 17 and each of the Secondary coil units 21, 22 have a winding number N2 of 9 to .
  • the first and second gaps 61, 62 are filled with a non-ferromagnetic material which, for example, comprises or is made of a plastic and/or a ceramic material.
  • the material filling the first and second gaps 61, 62 can, in particular, permanently connect two parts 51, 52 and 53, 54 of the central core part 50 to one another.
  • the magnetic core 5 can thus be formed from two units, each having two parts 51, 52 and 53, 54 of the central core part 50. The two units are inserted into the primary coil 11 and the first and second secondary coil units 21, 22 from sides opposite one another in the axial direction 91, wherein after complete insertion the central gap 63 is formed which remains filled with air.
  • the magnetic core 5 further comprises frame parts 55 which surround the central core part 50 .
  • the transformer 100 according to the embodiments described in Figure 1 and Figures 2A and 2B is characterized in particular by a three-chamber winding with thick partition walls 31, 32, i.e. large coil gaps 41, 42, which lie exactly above the two outer gaps, i.e. the first and second gaps 61, 62, of the magnetic core 5, which is a core with a distributed gap.
  • Figures 3A and 3B show the results of a simulation of the field distribution of the magnetic field H in a transformer according to the previous embodiments.
  • Figure 3A shows a density distribution of the magnetic field H
  • the graph in Figure 3B shows the field distribution along the in Figure 3A indicated axis L and thus along the coil carrier.
  • Figure 4 shows the results of a simulation of the field distribution of the magnetic field H in a conventional transformer with a two-chamber winding, in which there is only one air gap, below which the primary coil and above which the secondary coil are arranged, each having the same number of windings.
  • the parameters and in particular the number of windings were chosen so that the same main inductance and the same leakage inductance were achieved.
  • the leakage inductance can be adjusted using the described partition thicknesses and thus the described coil spacings.
  • the larger coil spacing or the large thickness of the partitions meets the requirement for a high leakage inductance.
  • the stray field is the part of the magnetic field that does not contribute to the main inductance. This part is added precisely in the area of the stray channels or the partition walls. Due to the larger coil spacing, i.e. the thick partition walls, the windings of the primary coil and the secondary coils are thus removed from the stray field. This leads to a further reduction in the additional losses. It is particularly clear from Figure 3B that the magnetic field strength in the area of the partition walls (marked areas 81) is very high compared to the magnetic field strength in the area of the middle gap (marked area 82).
  • FIG. 5 shows a schematic circuit diagram of an electrical device 1000, which may be a DC-DC converter, for example, which has the transformer 100 according to the previous embodiments.
  • the transformer 100 is part of a resonance element 200 of the electrical device, which is arranged between an inverter unit 300 and a rectifier unit 400.
  • the inverter unit 300 can be connected to a direct current source 500, for example formed by a AC power source and a rectifier or a battery, as indicated in Figure 5, while the rectifier unit 400 can be connected to a load 600, for example a battery to be charged.
  • the DC power source 500 and the load 600 are not necessarily parts of the electrical device 1000.
  • the resonance element 200 can particularly preferably be connected on its input side directly to the inverter unit 300 and its output side directly to the rectifier unit 400.
  • the resonance element 200 can also be referred to as a "resonant tank".
  • the transformer 100 can preferably form the resonance element 200 together with at least one capacitor 101 or, as shown, exactly one capacitor 101.
  • the resonance element 200 is free of further induction components apart from the transformer 100. This means that between the output of the inverter element 300 and the input of the rectifier element 400, apart from the transformer 100, there is no further induction component such as a coil or choke, but only one or more capacitors and/or one or more resistors.
  • the inductances required for the LLC configuration are formed by the magnetization inductance and the leakage inductance of the transformer 100. This results in a simplified and compact structure.
  • the three-chamber structure of the transformer 100 described above allows losses to be kept low.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un transformateur (100) qui comporte une première unité de bobine secondaire (21), une bobine primaire (11), une seconde unité de bobine secondaire (22) et un noyau magnétique (5) avec une partie de noyau centrale (50) qui est insérée dans la bobine primaire (11), la première unité de bobine secondaire (21) et la seconde unité de bobine secondaire (22), un premier espace de bobine (41) définissant un premier espacement de bobine (D1) étant disposé entre la bobine primaire (11) et la première unité de bobine secondaire (21), et un second espace de bobine (42) définissant un second espacement de bobine (D2) étant disposé entre la bobine primaire (11) et la seconde unité de bobine secondaire (22), la partie de noyau centrale (50) a un espace central (63) qui est disposé le long de la direction axiale (91) entre un premier espace (61) et un second espace (62), le premier espace (61) étant entouré dans la direction radiale (92) par le premier espace de bobine (41) et le second espace (62) étant entouré dans la direction radiale (92) par le second espace de bobine (42), et le premier espacement de bobine (D1) étant supérieur ou égal à une première largeur d'espace (S1) du premier espace (61) et le second espacement de bobine (D2) étant supérieur ou égal à une seconde largeur d'espace (S2) du second espace (62). L'invention concerne également un dispositif électrique (1000).
PCT/EP2024/057942 2023-04-19 2024-03-25 Transformateur et dispositif électrique doté d'un transformateur Ceased WO2024217826A1 (fr)

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DE102023109895.0A DE102023109895A1 (de) 2023-04-19 2023-04-19 Transformator und elektrische Vorrichtung mit Transformator

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010232272A (ja) * 2009-03-26 2010-10-14 Seiko Epson Corp トランス
WO2013061220A1 (fr) * 2011-10-25 2013-05-02 Brusa Elektronik Ag Composant inductif et utilisation
US20220181986A1 (en) * 2020-12-04 2022-06-09 Delta Electronics (Shanghai) Co., Ltd. Transformer and bidirectional isolated resonant converter

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7598839B1 (en) * 2004-08-12 2009-10-06 Pulse Engineering, Inc. Stacked inductive device and methods of manufacturing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010232272A (ja) * 2009-03-26 2010-10-14 Seiko Epson Corp トランス
WO2013061220A1 (fr) * 2011-10-25 2013-05-02 Brusa Elektronik Ag Composant inductif et utilisation
US20220181986A1 (en) * 2020-12-04 2022-06-09 Delta Electronics (Shanghai) Co., Ltd. Transformer and bidirectional isolated resonant converter

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JP2026512493A (ja) 2026-04-16

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