Classifications

• • 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
  • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
  • H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
  • H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
  • H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M7/21—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
  • H02M7/217—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
• • 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
  • H02M3/33561—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 having more than one ouput with independent control
• • 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
  • H02M3/33569—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 having several active switching elements
  • H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
• • 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
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
  • H02M1/0074—Plural converter units whose inputs are connected in series
• • 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
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
  • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
• • 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
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0083—Converters characterised by their input or output configuration
  • H02M1/0087—Converters characterised by their input or output configuration adapted for receiving as input a current source

Definitions

• the present invention relates to a switching power converter with current input.
• an electrical energy converter having at least two electrically isolated outputs.
• FIG. 1 A structure of such a generalized use electric energy converter is shown in FIG.
• This energy converter comprises in particular a power inductor 1 connected to the input of the converter, a rectifying stage 2, a switching stage 3 making it possible to pass or not the passage of energy towards the primary of a first transformer 4 and a second rectifying stage 5 which is taken a first output Outputi.
• a second Output 2 output is generated from the first Output- ⁇ output.
• a second switching stage 6 is mounted at the primary of a second transformer, 7 and a third grinding stage 8 is mounted at the output of the secondary of the second transformer 7, the second output Output 2 being taken at the exit of the third righting stage.
• the switching stages operate according to a switching frequency which is a function of the output levels Output- ⁇ , Output 2 .
• Such an electrical energy converter structure is bulky, its volume and weight being important.
• the "Design Review: 140W, Multiple Output High Density DC / DC Converter” offers a power converter in which the footprint is reduced.
• the proposed solution consists of increasing the switching frequency of the switching means in input steps controlling the transformers. Nevertheless, the increase of the switching frequency results in the reduction of the components of the input stage and does not modify the size of the output stages ensuring the electrical isolation of the outputs.
• the object of the present invention is to propose a switching electric energy converter structure that further reduces the space requirement on the input stage and on the output stages.
• the present invention relates to a current-input switching power converter comprising at least one conversion module generating at least a first output signal and a second output signal and comprising:
• a transformer comprising at least one primary winding and at least a first secondary winding and a second secondary winding
• an input switching stage comprising input switching means controlling the transfer of electrical energy to the transformer
• the first output stage generating the first output signal and comprising first rectifying means
• the second output stage generating the second output signal and comprising second rectifying means and output switching means controlling the second rectifying means;
• the level of the first output signal reflected to said at least one primary winding of the transformer being greater than the level of the second output signal reflected to said at least one primary winding of the transformer.
• Such a converter structure makes it possible to increase the switching frequency on the input signal and on the output signals of the first and second output stages, thus containing less passive power elements with energy storage and less power.
• transformers than a conventional converter structure. Therefore its volume and weight are lower than conventional structures of electric power converters.
• the cost of a converter structure according to the invention is also lower than the cost of a conventional structure.
• the first output signal corresponds to the signal at the output of the first secondary winding of the transformer rectified by the first rectifying means
• the second output signal corresponds to the signal at the output of the second secondary winding of the transformer rectified by the second rectifying means.
• the converter comprises at least a first and a second conversion module, the input switching steps of each conversion module being connected in series with each other and with a current source, each conversion module generating the same number of output signals, the first output signals of the conversion modules being interconnected and the second output signals of the conversion modules being interconnected.
• the first output signals of the conversion modules form a first output signal of the converter and the second output signals of the conversion modules form a second output signal of the converter.
• the frequency of the output signals is doubled and the effective currents on the electrical components are reduced on both the input signals and the output signals.
• the current source includes a power inductor.
• control signals controlling the input switching means and the output switching means of said first conversion module have a predetermined phase shift by to control signals controlling the input switching means and the output switching means of the second conversion module.
• each output signal of the converter is composed of output signals of the conversion modules, an output signal of a conversion module being generated with an offset with respect to an output signal of another conversion module.
• the phase shift has a value substantially equal to 360 ° divided by the number of conversion modules of the converter.
• the input switching stage further comprises a switching assistance circuit comprising passive electrical components.
• the input switching step further comprises a switching aid circuit having controlled power transistors.
• the converter comprises at least a first electrical energy storage capacitor and a second electrical energy storage capacitor respectively mounted at the output of the first rectifying means and second rectifying means of at least one rectifying module. conversion.
• each output stage comprises respectively an inductance mounted in series respectively with the rectifying means.
• FIG. 1 illustrates an electrical energy converter structure of the prior art
• FIG. 2 illustrates a power converter structure according to an embodiment of the invention
• FIG. 3 illustrates curves of the electrical signals in the electrical energy converter of FIG. 2.
• the energy converter illustrated in FIG. 2 generates two output signals V or n, V out 2, from a signal V in at its input.
• the output signals Voun, V or t2 are voltages.
• a power converter according to the invention can generate a number of higher output signals.
• the example described comprises two conversion modules K1, K2.
• the conversion modules K1, K2 are identical.
• Each conversion module K1, K2 comprises a transformer 10 comprising a primary winding January 1, a first secondary winding 12 and a second secondary winding 13.
• the transformer 10 generates a first output signal of the transformer Vi and a second output signal of the transformer V 2 , the first output signal of the transformer Vi being taken at the first secondary winding 12 and the second output signal of the transformer V 2 being taken at the second secondary winding 13.
• the number of windings of the transformer 10 may be different.
• the number of secondary windings is greater than two.
• the number of output signals from the transformer (and the converter) is greater than two and equal to the number of secondary windings.
• the transformer has a primary winding and four secondary windings.
• the electric power converter then has four output signals.
• each conversion module K1, K2 further comprises an input switching stage 20 comprising input switching means 21.
• the input switching stages 20 of each conversion module K1, K2 are connected in series with each other and with a current source 10 .
• the input switching means 21 are implemented by means of a power switch controlled at the closing and opening, for example an IGBT (acronym for the term “Insulated Gate Bipolar Transistor”), a MOSFET (an acronym for the term “Metal-Oxide Semiconductor Field-Effect Transistor”) or a GTO (acronym for the term “Turn-Off Thyristor”).
• IGBT Insulated Gate Bipolar Transistor
• MOSFET an acronym for the term “Metal-Oxide Semiconductor Field-Effect Transistor”
• GTO acronym for the term “Turn-Off Thyristor”
• the input switching means 21 are able to control the transfer of electrical energy to the transformer 10. Thus, they operate according to a switching frequency and an input duty cycle which have a value which is a function of the desired values for the first output signal of the transformer V and the second output signal of the transformer V 2 .
• each conversion module K1, K2 comprises a first output stage 30 and a second output stage 40.
• the first output stage 30 is mounted at the output of the first secondary winding 12 of the transformer 10 and comprises rectifying means 31 able to rectify the first output signal of the transformer V-. This first output stage 30 generates the first output signal V or ti.
• the second output stage 40 is mounted at the output of the second secondary winding 13 of the transformer 10 and comprises second rectifying means 41 able to straighten the second output signal. of the transformer V 2 , as well as output switching means 42 able to control the second rectifying means 41.
• the second output stage 40 generates the second output signal V out 2-
• the output switching means 42 are implemented by means of a power switch controlled closing and openable when the current flowing therethrough is substantially zero.
• Such a power switch may be for example an SCR (acronym for the term “Silicon Controlled Rectifier”) or a controlled transistor operating as a thyristor such as an "IGBT” or a "MOFSET”.
• the output switching means 42 operate at an output switching frequency having a value which is a function of the desired value for the second output signal V or t2.
• the first rectifying means 31 and the second rectifying means 41 respectively comprise at least a first diode A and a second diode B.
• a first electrical energy storage capacitor C1 and a second electrical energy storage capacitor C2 are respectively mounted at the output of the first rectifying means 31 and the second rectifying means 41 of the first conversion module K1.
• each conversion module K1, K2 are interconnected.
• First output currents lu, l 2 i of each first rectifying stage 30 of each conversion module K1, K2 are therefore added to form a first output current ⁇ of the converter.
• each conversion module K1, K2 are also interconnected.
• Second output currents ⁇ ⁇ 2 , I22 of each second rectifying stage 40 are therefore added to form a second output current I 2 of the converter.
• the input voltage of the converter V in is divided into two input signals Ui, U 2 addressed to the first and second conversion modules K1, K2 respectively.
• the switching period Tn of the input signals Ui, U 2 is represented in FIG. 3. Over this switching period Tn, a first fraction T corresponds to the generation of the first output signal V out i and a second fraction T 2 corresponds to the generation of the second output signal V out2 .
• the first fraction T of the chopping period Tn is responsible for the generation of the first output currents lu, l 2 i and the second fraction T2 is responsible for the generation of the second output currents l 2 i, l 22 .
• the average value of the first output current of the converter is greater than the average values of the first output currents lu, 1 2 i of each first rectification stage 30.
• the average value of the second output current I 2 of the converter is greater than the average values of the second output currents I 21; I22 of each second rectifying stage 40. Therefore, the value of the frequency of the output signals is doubled compared to that of a conventional structure and the effective currents are reduced in the power switches and in the passive components such as the electrical energy storage capacitors C1, C2 and the input inductor (not shown) implementing the current source l 0 .
• the size of the electrical energy storage capacitors C1, C2 respectively located at the output of said first rectifying means 31 and the second rectifying means 41 can be reduced.
• the size of the input inductance providing the current source 10 arranged in series with the conversion modules K1, K2 is decreased.
• the input signals U 1 , U 2 have a phase shift of 180 °, that is to say half of a switching period T n.
• This phase shift value corresponds to 360 ° divided by the number of conversion modules, here 2.
• the instantaneous sum of the input signals U1, U2 makes it possible to reduce the effective component applied across the input inductor implementing the current source 10 .
• the switching stage 20 further comprises a switching assistance circuit.
• a switching assistance circuit is, for example, the passive circuit for switching assistance described in the document FR2972317A.
• the switching assistance circuit makes it possible to reduce the overvoltages at the terminals of the input switching means 21 and to reduce the losses due to its switching.
• each output stage 30, 40 comprises an inductor L1, L2.
• the first output stage 30 comprises a first inductor L1 mounted between the first secondary winding 12 and the first rectifying means 31, and the second output stage 40 comprises a second inductor L2 mounted between the second secondary winding. 13 and the second rectifying means 41.
• first and second inductors L1, L2 make it possible respectively to spread the first output current lu and the second output current li 2 over a longer period.
• the rms value of the output currents lu, 2 is lower than in the case of a conventional topology and the efficiency of the energy converter is increased.
• the number of conversion modules K1, K2 is different.
• the value of the first output voltage signal V or n reflected on the primary of the transformer 10, that is to say, brought back on the primary side of the transformer 10 is greater than the value of the second output voltage signal V or t2 reflected at the primary of the transformer 10, that is to say, brought back to the primary side of the transformer 10 (m2 * V out 2, nn2 being the ratio transforming the second secondary winding 13).
• the energy of the current source 10 passing through the transformer 10 of the first conversion module K1 is then transferred into the first electrical energy storage capacitor C1, on the first fraction Ti of the cutting period Tn.
• the first output signal Voun is generated and reflected or brought back to the primary side of the transformer 10 (m1 * Voun), as well as to the terminals of the second secondary winding 13.
• the energy of the current source 10 is then shared between the two outputs.
• first and second inductors L1, L2 is chosen so that the average value of the first output current and the second current output of the 2 be an integer value at each chopping period Tn.
• the second output signal V or t2 is generated during the second fraction T 2 of the switching period Tn.
• the voltage reflected on the primary side of the transformer 1 0 is then equal to V out 2 * m2. This voltage is lower than the reflected voltage (V or ti * m1) on the primary side of the transformer 10 during the first fraction Ti.
• T 2 This difference between the reflected voltage on the primary side of the transformer 10 during the first and the second fraction T ; T 2 is shown in Figure 3 on the graph corresponding to the input signals Ui and U 2 at the times TU and TU-ia respectively 2a.
• the primary winding 11 of the transformer 10 is short-circuited and channels all of the current from the current source 10 .
• the input switching means 21 remain closed on a third fraction T 3 of the switching period Tn in order to guarantee a zero average voltage across the current source 10 over a switching period Tn.
• the first conversion module K1 no longer provides energy for the generation of the first output signal V out i and the second output signal V or t2, the second conversion module K2 being the only one to carry out the transfer of energy.
• the input switching means 21 open to promote the conduction of the first diode A and start a new switching period Tn.
• the operation of the second conversion module K2 is identical to the operation of the first conversion module K1.
• the conversion modules K1, K2 are not identical.
• the conversion modules generate output signals of different numbers.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Dc-Dc Converters (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48521142

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (12)

• 2013
  • 2013-01-23 FR FR1350580A patent/FR3001350B1/fr active Active
• 2014
  • 2014-01-22 CN CN201480005759.7A patent/CN104956579A/zh active Pending
  • 2014-01-22 US US14/762,627 patent/US9866141B2/en not_active Expired - Fee Related
  • 2014-01-22 WO PCT/FR2014/050119 patent/WO2014114878A2/fr not_active Ceased
  • 2014-01-22 EP EP14705835.8A patent/EP2949032A2/de not_active Withdrawn
  • 2014-01-22 RU RU2015135500A patent/RU2015135500A/ru not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events