CN103762846A - Magnetic integrated resonant converter - Google Patents
Magnetic integrated resonant converter Download PDFInfo
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- CN103762846A CN103762846A CN201410040351.5A CN201410040351A CN103762846A CN 103762846 A CN103762846 A CN 103762846A CN 201410040351 A CN201410040351 A CN 201410040351A CN 103762846 A CN103762846 A CN 103762846A
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Abstract
A magnetic integrated resonant converter comprises a resonant circuit and an integrated magnetic assembly. The output end of the resonant circuit is coupled with primary windings of the integrated magnetic assembly. The magnetic integrated resonant converter is characterized in that the integrated magnetic assembly serves as a magnetic integrated transformer; the integrated magnetic assembly comprises a pair of magnetic cores oppositely arranged, each magnetic column is provided with no less than three magnetic columns, the primary windings and secondary windings wind the magnetic cores, all the secondary windings wind the center magnetic columns, and all the primary windings wind the center magnetic columns and the edge columns. According to the resonant converter with the integrated magnetic assembly adopted, the conversion efficiency of the magnetic assembly of the converter is the maximum, and in the industrial mass production process, the manufacturing process of the resonant converter is simple.
Description
Technical field:
The invention belongs to electric and electronic technical field, relate to a kind of controlled resonant converter, be specifically related to LLC controlled resonant converter, DC/DC DC converter and Switching Power Supply.
Technical background:
Traditional LLC series resonant converter as shown in Figure 1, LC parallel resonance converter as shown in Figure 2, three-phase controlled resonant converter as shown in Figure 3, resonant circuit all designs independently inductance L r, resonant circuit comprises a resonant inductance Lr who is serially connected in winding one end, the former limit of main transformer, traditional resonant circuit adopts the design of inductance and resonance transformer series connection, has three defects; One; The volume of two assemblies is large; They are two years old; In electric energy-magnetic energy-transformation of electrical energy process, the conversion efficiency of magnetic energy can not be fully utilized; They are three years old; Two of resonant inductance Lr and main transformer T be magnetic circuit system independently, needs independent design.
In the document that is ZL200710192354.0 in the patent No., the EE of pair of opposing is unshakable in one's determination, and the former limit of part winding and whole secondary winding are on newel, and the former limit of another part winding is on side column, because former limit winding has been divided into two windings, industrialization volume production wire winding is complicated.
In the document of " ArkadiyKats; GregoryIvensky; SamBen-Yakov " " Application of interated magnetics in resonant converters " " IEEE-APEC; 1997:925-930 ", adopt two secondary magnetic cores to be used in combination, can solve bulky problem; But resonant inductance Lr and main transformer T are two independently magnetic circuit systems, the conversion efficiency of magnetic circuit system, transform power/magnet weight ratio can not reach maximum.
Summary of the invention:
Object of the present invention solves the problems of the prior art exactly, provides a kind of magnetic integrated controlled resonant converter, and this converter, by the main transformer in original circuit and two discrete magnetic parts of inductance, is designed to integrated magnetics; This converter can reduce the volume of resonant inductance and transformer, can make again the conversion efficiency of magnetic part reach maximum.
In addition, the present invention also aims to, the DC/DC converter and the Switching Power Supply that adopt this controlled resonant converter are provided.
For achieving the above object, the present invention is by the following technical solutions:
The integrated controlled resonant converter of magnetic, comprises resonant circuit and integrated magnetics, and the former limit winding of the output of described resonant circuit and described integrated magnetics is coupled, and it is characterized in that this converter using integrated magnetics is as magnetic integrated transformer; This integrated magnetics comprises pair of opposing, and be no less than the magnetic core of 3 magnetic posts, on magnetic core, be wound with respectively former limit winding (Np) and secondary winding (Ns), secondary winding (Ns) is all on the magnetic post of center, and former limit winding (Np) is all on center magnetic post and side column;
Further, described integrated magnetics is suitable for the controlled resonant converter of Huo Fu limit, former limit series resonance inductor;
Further, described integrated magnetics has 3 branch's magnetic circuits at least;
Further, the integrated resonance transformer of described magnetic is that former limit winding is all on Liang Ge branch magnetic post;
Further, the integrated resonance transformer of described magnetic is that secondary winding is all on Yi Ge branch magnetic circuit;
Further, the magnetic gap of the integrated resonance transformer secondary of described magnetic winding magnetic circuit, is less than the magnetic gap without secondary winding magnetic circuit;
Further, described resonant circuit is series resonance or parallel resonance topology.
The present invention also provides a kind of DC/DC converter, comprises the integrated controlled resonant converter of switching circuit and magnetic, and the input of the output of described switching circuit and the integrated controlled resonant converter of described magnetic is coupled, and the integrated controlled resonant converter of described magnetic is aforesaid controlled resonant converter;
Further, described switching circuit is half-bridge or full bridge switching circuit;
Further, described controlled resonant converter is single-phase controlled resonant converter or three-phase controlled resonant converter;
The present invention also provides a kind of Switching Power Supply, comprises and exchanges input module, DC/DC converter and direct current output module, and it is characterized in that, described converter is foregoing DC/DC converter.
The technique effect that the present invention is useful is:
Than traditional design scheme, the present invention, by the transformer in original circuit and two discrete magnetic parts of inductance, is designed to an integrated magnetics, a closed loop magnetic circuit, under the effect of elementary alternating current, elementary alternating magnetic field is simultaneously through secondary winding magnetic circuit with without winding magnetic circuit; Two independent magnetic circuits in parallel, under identical elementary alternation magnetic pressure IN effect, by adjusting sectional area and the magnetic resistance (magnetic gap) of Liang Ge branch magnetic circuit, obtain the magnetic flux that Liang Ge branch magnetic circuit needs; Reach the identical object of the close Br of magnetic of two magnetic circuits, the shared closed magnetic circuit of Liang Ge branch magnetic circuit due to former limit winding and pair limit winding, causes the magnetizing inductance of main converter to increase, and the exciting current of switching circuit reduces, and transformation of electrical energy efficiency improves; Meanwhile, integrated magnetics, in the controlled resonant converter electronic switch down periods, is one and is the global facility that inductive nature releases energy, the dump energy current characteristic classics of release, and harmonic component is minimum, and switching tube enters rapidly zero-voltage state.
" Arkadiy Kats, Gregory Ivensky, Sam Ben-Yakov " " Application of interated magnetics in resonant converters " " IEEE-APEC, 1997:925-930 " document in, adopt two secondary separate cores combinations, cause in the controlled resonant converter electronic switch down periods, two parts that are independently inductive nature, owing to there is no magnetic circuit coupling, cause the dump energy current characteristic of release not classical, harmonic component is abundant, need relatively large equivalent resonant inductance (consumption magnetic material), just can make switching tube enter zero-voltage state.
Adopt the controlled resonant converter of this integrated magnetics, the conversion efficiency of converter magnetic part is maximum; In industrialization volume production process, the manufacturing process of resonance transformer is simple.
Accompanying drawing explanation:
Fig. 1 is traditional LLC series resonant converter circuit diagram;
Fig. 2 is traditional LC parallel resonance converter circuit schematic diagram
Fig. 3 is the schematic diagram of traditional three-phase LLC series resonant converter
Fig. 4 is a kind of execution mode schematic diagram of three magnetic column type magnetic integrated packages the present invention relates to;
Fig. 5 is the another kind of execution mode schematic diagram of three magnetic column type magnetic integrated packages the present invention relates to;
Fig. 6 is the another kind of execution mode schematic diagram of four magnetic column type magnetic integrated packages the present invention relates to;
Fig. 7 is the another kind of execution mode schematic diagram of four magnetic column type magnetic integrated packages the present invention relates to;
Fig. 8 is the integrated magnetics execution mode schematic diagram of the three-phase seven magnetic post magnetic cores that the present invention relates to;
Fig. 9 is for adopting Fig. 6 magnetic integrated package to be applied to the schematic diagram of single-phase LLC series resonant converter;
Figure 10 is for adopting Fig. 4 magnetic integrated package to be applied to the schematic diagram of parallel single-phase controlled resonant converter;
Figure 11 is for adopting Fig. 8 magnetic integrated package to be applied to the schematic diagram of three-phase LLC series resonant converter.
Embodiment:
Should be appreciated that specific embodiment described herein, only for explaining the present invention, is not intended to limit the present invention.
Referring to Fig. 4, be the integrated magnetics of three magnetic column type magnetic cores, secondary winding is all on the magnetic post of center, and former limit winding is all on center magnetic post and a side magnetic post, and newel magnetic gap is less than side magnetic post magnetic gap, and another side magnetic post is without magnetic gap; The coupling coefficient of equivalence resonant inductance amount (Lr) and the former secondary of main converter (T) is once adjusted, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high, is applicable to suitability for industrialized production.
Referring to Fig. 5, be another integrated magnetics of three magnetic column type magnetic cores, secondary winding is all on the magnetic post of center, and former limit winding is all on center magnetic post and a side magnetic post, and newel magnetic gap is less than side magnetic post magnetic gap, and another side magnetic post has magnetic gap; The coupling coefficient of equivalence resonant inductance amount (Lr) and the former secondary of main converter (T) can secondary adjustment, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high, convenient adjustment operating frequency.
Referring to Fig. 6, be the integrated magnetics of four magnetic column types, secondary winding is all upper around center magnetic post a, and former limit winding is all upper around center magnetic post a and center magnetic post b, and center magnetic post a magnetic gap is less than center magnetic post b magnetic gap; Both sides magnetic post is without magnetic gap, and the transformer electromagnetic radiation of this magnetic structure is very little, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high, is applicable to large-scale production.
Referring to Fig. 7, be another integrated magnetics of four magnetic column types, secondary winding is all upper around center magnetic post a, and former limit winding is all upper around center magnetic post a and center magnetic post b, and center magnetic post a magnetic gap is less than center magnetic post b magnetic gap; Both sides magnetic post has magnetic gap, and the coupling coefficient of equivalent resonant inductance amount (Lr) and the former secondary of main converter (T) can secondary adjustment, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high; The convenient operating frequency of adjusting.
Referring to Fig. 8, be the integrated magnetics of seven magnetic post magnetic cores, wherein the magnetic gap of At, Bt, Ct three-phase three road magnetic posts is identical; A
l, B
l, C
lthe magnetic gap of three-phase three road magnetic posts is identical; The sectional area of At, Bt, Ct three-phase three road magnetic posts is identical; A
l, B
l, C
lthe sectional area of three-phase three road magnetic posts is identical; The magnetic gap of At, Bt, Ct three-phase three road magnetic posts is less than A
l, B
l, C
lthe magnetic gap of three-phase three road magnetic posts; Former limit A phase winding is all around At/A
lon two magnetic posts, A phase secondary winding is all on At magnetic post; Former limit B phase winding is all around Bt/B
lon two magnetic posts, B phase secondary winding is all on Bt magnetic post; Former limit C phase winding is all around Ct/C
lon two magnetic posts, C phase secondary winding is all on Ct magnetic post; Electric energy/magnetic energy/transformation of electrical energy efficiency of this three-phase 7 magnetic rod structures, the magnetic material utilance of magnetic part is maximum, surpasses Fig. 4 Fig. 5 Fig. 6 Fig. 7 structure.Be applicable to three LLC controlled resonant converters.
[specific embodiment 1]
With reference to Fig. 9, be to adopt the integrated magnetics of Fig. 6 to be applied to series resonant converter, controlled resonant converter comprises switching circuit, resonant circuit, integrated magnetics;
Switching circuit is half-bridge chopper, this chopper is composed in series by switching tube Q1 and switching tube Q2, the input termination direct voltage source Vin of chopper, the input of the output termination resonant circuit of chopper, chopper is chopped into direct current ac square wave and exports resonant circuit to, resonant circuit converts ac square-wave voltage to sinusoidal current waveform, controlled resonant converter comprises resonant circuit and main transformer, resonant circuit adopts LLC series resonance topology, the equivalent resonant inductance Lr and the resonant capacitance Cr that comprise magnetic integrated package, the inductance of resonant capacitance Cr and magnetic integrated package is connected in series formation resonant tank.
In the embodiment of the present invention, switching circuit can be half-bridge chopper or full-bridge chopper.
Than traditional design scheme, the resonant inductance Lr and the main transformer T that are originally arranged in resonant circuit output are substituted by magnetic integrated package, under equal requirement, resonant inductance Lr and the main transformer T of resonant circuit output will be arranged in, become a shared closed magnetic circuit Liang Ge branch magnetic circuit, and born respectively the magnetic integrated package of equivalent resonant inductance Lr and main transformer T function.Adopt the integrated package of three magnetic column type magnetic cores, secondary winding is all on the magnetic post of center, former limit winding is all on center magnetic post and a side magnetic post, equivalence resonant inductance (Lr) and main converter (T) coupling coefficient can be adjusted respectively, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high.
In the embodiment of the present invention, integrated magnetics has at least two magnetic posts to open magnetic gap.
In the embodiment of the present invention, two magnetic posts that the former limit of integrated magnetics winding holds are opened magnetic gap.
[specific embodiment 2]
With reference to Figure 10, be to adopt the integrated magnetics of Fig. 4 to be applied to parallel resonance converter, controlled resonant converter comprises switching circuit, resonant circuit, integrated magnetics.
Switching circuit is single-ended switching circuit, this switching circuit consists of switching tube Q2, the input of the output termination resonant circuit of switching circuit, switching circuit is chopped into direct current ac square wave and exports resonant circuit to, resonant circuit converts ac square-wave voltage to sinusoidal current waveform, controlled resonant converter comprises resonant circuit and main transformer, resonant circuit adopts LC parallel resonance topology, the equivalent inductance Lr and the resonant capacitance Cr that comprise magnetic integrated package, the equivalent inductance of resonant capacitance Cr and the magnetic integrated package formation resonant tank that is connected in parallel;
Than traditional design scheme, the resonant inductance Lr and the main transformer T that are originally arranged in resonant circuit output are substituted by magnetic integrated package, under equal requirement, resonant inductance Lr and the main transformer T of resonant circuit output will be arranged in, become a shared closed magnetic circuit Liang Ge branch magnetic circuit, and born respectively the integrated package of equivalent resonant inductance Lr and main transformer T function.Adopt the integrated package of three magnetic column type magnetic cores, secondary winding is all on the magnetic post of center, former limit winding is all on center magnetic post and a side magnetic post, equivalence resonant inductance (Lr) and main converter (T) coupling coefficient can be adjusted respectively, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high.
In the embodiment of the present invention, switching circuit is single-ended switching circuit.
In the embodiment of the present invention, integrated magnetics has at least two magnetic posts to open magnetic gap.
In the embodiment of the present invention, two magnetic posts that the former limit of integrated magnetics winding holds are opened magnetic gap.
[specific embodiment 3]
With reference to Figure 11, be to adopt the integrated magnetics of Fig. 8 to be applied to three-phase series controlled resonant converter, three-phase DC/DC converter comprises threephase switch circuit, resonant circuit, magnetic integrated package.
In the embodiment of the present invention, switching circuit is three-phase half-bridge chopper, also can be set to full-bridge chopper;
In the embodiment of the present invention, resonant circuit is series resonant circuit, and resonant circuit comprises the equivalent resonant inductance Lr of magnetic integrated package and resonance capacitor C ra, Crb, Crc; Resonant circuit becomes the square wave input voltage of switching circuit into simple sinusoidal alternating current.
In the embodiment of the present invention, the brachium pontis of three switching circuits is in parallel with input direct-current bus respectively; Three switching circuits are by switching tube Q1 and Q2, Q3 and Q4, and Q5 and Q6 be corresponding series connection respectively, forms 3 pairs of brachium pontis.
In the embodiment of the present invention, the mid point of 3 pairs of brachium pontis is as the output of switching circuit square-wave voltage, be connected with the input of resonant circuit respectively, resonant circuit output is connected in series with the former limit of three-phase winding A, B, the C of magnetic integrated package respectively, the former limit of three-phase winding A, B, C are star-like connection, and mid point is connected with the negative terminal of switching circuit.
In the embodiment of the present invention, magnetic integrated package adopts the integrated package of seven magnetic column type magnetic cores, and A phase secondary winding is all on At magnetic post, and the mutually former limit of A winding is all around At magnetic post and A
lon magnetic post; B phase secondary winding is all on Bt magnetic post, and the mutually former limit of B winding is all around Bt magnetic post and B
lon magnetic post, C phase secondary winding is all on Ct magnetic post, and the mutually former limit of C winding is all around Ct magnetic post and C
lon magnetic post.
In the embodiment of the present invention, integrated magnetic assembly has at least six magnetic posts to open magnetic gap.
In the embodiment of the present invention, six magnetic posts that the former limit of integrated magnetic assembly winding A phase, B phase, C hold are mutually opened magnetic gap.
In the embodiment of the present invention, resonant circuit comprises the equivalent resonant inductance of magnetic integrated package unit and resonance capacitor C ra, Crb, Crc.
In the embodiment of the present invention, the capacitance of resonant capacitance Cra, Crb, Crc equates.
In the embodiment of the present invention, the former limit of three-phase, the magnetic integrated package unit winding number of turns is identical;
In the embodiment of the present invention, the magnetic integrated package unit three-phase secondary winding number of turns is identical;
Than conventional solution, A phase, B phase, C phase three resonant inductance Lra, Lrb, Lrc and three-phase main transformer T of being originally arranged in resonant circuit output are substituted by a magnetic integrated package, under equal requirement, A phase, B phase, three resonant inductances of C phase and the three-phase main transformer T of resonant circuit output will be arranged in, become the magnetic integrated package of a shared closed magnetic circuit Qi Ge branch magnetic circuit, the volume of magnetic core reduces, and the electric energy/magnetic energy of magnetic core/transformation of electrical energy efficiency is high.
In the embodiment of the present invention, this magnetic integrated package is applicable to the controlled resonant converter of former limit or secondary series resonance inductor.
The present invention also provides a kind of Switching Power Supply, and described Switching Power Supply comprises the interchange input module connecting successively, above-mentioned DC/DC converter and direct current output module.Exchange input module alternating current is carried out converting direct current to after ac filter, rectification, by DC/DC converter, undertaken exporting direct current output module to after DC/DC conversion, direct current output module carries out providing final DC signal after direct current rectifying and wave-filtering.
Be to be understood that; the foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly applied in other correlative technology fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the integrated controlled resonant converter of magnetic, comprises resonant circuit and integrated magnetics, and the former limit winding of the output of described resonant circuit and described integrated magnetics is coupled, and it is characterized in that, this converter using integrated magnetics is as magnetic integrated transformer; This integrated magnetics comprises pair of opposing, and is no less than the magnetic core of 3 magnetic posts, is wound with respectively former limit winding and secondary winding on magnetic core, and secondary winding is all on the magnetic post of center, and former limit winding is all on center magnetic post and side column.
2. converter according to claim 1, is characterized in that, described integrated magnetics is suitable for the controlled resonant converter of former limit or secondary series resonance inductor.
3. converter according to claim 1, is characterized in that, described integrated magnetics has 3 branch's magnetic circuits at least.
4. converter according to claim 3, is characterized in that, the integrated resonance transformer of described magnetic is that former limit winding is all on Liang Ge branch magnetic post.
5. converter according to claim 3, is characterized in that, the integrated resonance transformer of described magnetic is that secondary winding is all on Yi Ge branch magnetic circuit.
6. converter according to claim 1, is characterized in that, the magnetic gap of the integrated resonance transformer secondary of described magnetic winding magnetic circuit is less than the magnetic gap without secondary winding magnetic circuit.
7. converter according to claim 1, is characterized in that, described resonant circuit is series resonance or parallel resonance topology.
8. a DC/DC converter, comprise the integrated controlled resonant converter of switching circuit and magnetic, the input of the output of described switching circuit and the integrated controlled resonant converter of described magnetic is coupled, the integrated controlled resonant converter of described magnetic be one of claim 1-7 described controlled resonant converter.
9. DC/DC converter according to claim 8, described switching circuit is half-bridge or full bridge switching circuit, described controlled resonant converter is single-phase controlled resonant converter or three-phase controlled resonant converter.
10. a Switching Power Supply, comprises and exchanges input module, DC/DC converter and direct current output module, and it is characterized in that, described DC/DC converter is DC/DC converter claimed in claim 9.
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| CN201410040351.5A CN103762846A (en) | 2014-01-27 | 2014-01-27 | Magnetic integrated resonant converter |
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| CN105703655A (en) * | 2016-04-14 | 2016-06-22 | 鞍山基理光电科技有限公司 | Magnetic pressure coupling resonant converter |
| CN107124104A (en) * | 2016-02-25 | 2017-09-01 | 株式会社村田制作所 | DC/DC conversion equipments |
| CN108599574A (en) * | 2018-04-26 | 2018-09-28 | 广州金升阳科技有限公司 | A kind of zero ripple converter of output |
| CN109067186A (en) * | 2018-09-14 | 2018-12-21 | 广州金升阳科技有限公司 | A kind of modified exports zero ripple converter and its control method |
| CN109087788A (en) * | 2018-07-19 | 2018-12-25 | 广东美信科技股份有限公司 | A kind of flat-plate transformer |
| CN109326419A (en) * | 2017-07-31 | 2019-02-12 | 联合汽车电子有限公司 | Integrated device and preparation method thereof and DC converter |
| CN110729903A (en) * | 2019-09-11 | 2020-01-24 | 华为技术有限公司 | Magnetic device and bidirectional DC conversion circuit |
| CN111883351A (en) * | 2020-07-23 | 2020-11-03 | 天津大学 | Magnetic core structure based on multi-resonance converter |
| US20210083589A1 (en) * | 2019-09-12 | 2021-03-18 | Delta Electronics (Shanghai) Co.,Ltd. | Bidirectional isolated resonant converter |
| CN113872432A (en) * | 2021-11-17 | 2021-12-31 | 四川莱福德科技有限公司 | Power factor correction converter and control method |
| CN113950790A (en) * | 2019-03-21 | 2022-01-18 | 西门子能源环球有限责任两合公司 | DC voltage converter having a secondary resonant circuit capacitor, and method for operating a DC voltage converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107124104A (en) * | 2016-02-25 | 2017-09-01 | 株式会社村田制作所 | DC/DC conversion equipments |
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| CN109326419A (en) * | 2017-07-31 | 2019-02-12 | 联合汽车电子有限公司 | Integrated device and preparation method thereof and DC converter |
| CN108599574A (en) * | 2018-04-26 | 2018-09-28 | 广州金升阳科技有限公司 | A kind of zero ripple converter of output |
| CN108599574B (en) * | 2018-04-26 | 2019-06-25 | 广州金升阳科技有限公司 | A kind of zero ripple converter of output |
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| CN109087788A (en) * | 2018-07-19 | 2018-12-25 | 广东美信科技股份有限公司 | A kind of flat-plate transformer |
| CN109067186A (en) * | 2018-09-14 | 2018-12-21 | 广州金升阳科技有限公司 | A kind of modified exports zero ripple converter and its control method |
| CN109067186B (en) * | 2018-09-14 | 2024-02-13 | 广州金升阳科技有限公司 | Improved output zero ripple converter and control method thereof |
| CN113950790A (en) * | 2019-03-21 | 2022-01-18 | 西门子能源环球有限责任两合公司 | DC voltage converter having a secondary resonant circuit capacitor, and method for operating a DC voltage converter |
| US12003182B2 (en) | 2019-03-21 | 2024-06-04 | Siemens Energy Global GmbH & Co. KG | DC-to-DC converter having a secondary resonant circuit capacitor, and method for operating a DC-to-DC converter |
| CN110729903A (en) * | 2019-09-11 | 2020-01-24 | 华为技术有限公司 | Magnetic device and bidirectional DC conversion circuit |
| US11955883B2 (en) | 2019-09-11 | 2024-04-09 | Huawei Technologies Co., Ltd. | Magnetic apparatus and two-way DC converter circuit |
| US20210083589A1 (en) * | 2019-09-12 | 2021-03-18 | Delta Electronics (Shanghai) Co.,Ltd. | Bidirectional isolated resonant converter |
| US11626806B2 (en) * | 2019-09-12 | 2023-04-11 | Delta Electronics (Shanghai) Co., Ltd. | Bidirectional isolated resonant converter with integrated resonant inductor and isolated transformer |
| CN111883351A (en) * | 2020-07-23 | 2020-11-03 | 天津大学 | Magnetic core structure based on multi-resonance converter |
| CN113872432A (en) * | 2021-11-17 | 2021-12-31 | 四川莱福德科技有限公司 | Power factor correction converter and control method |
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Application publication date: 20140430 |