CN1734903A - Three-level output soft-switch isolated DC converter - Google Patents

Three-level output soft-switch isolated DC converter Download PDF

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Publication number
CN1734903A
CN1734903A CNA2005100413700A CN200510041370A CN1734903A CN 1734903 A CN1734903 A CN 1734903A CN A2005100413700 A CNA2005100413700 A CN A2005100413700A CN 200510041370 A CN200510041370 A CN 200510041370A CN 1734903 A CN1734903 A CN 1734903A
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rectifier diode
anode
converter
circuit
compound active
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CN100379131C (en
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毛赛君
王慧贞
龚春英
严仰光
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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Abstract

The soft-switch isolating DC converter connected to high-frequency isolating transformer (3) for input DC voltage (1) by high-frequency inversion circuit (2) is characterized in that connecting the output of transformer (3) to filter circuit (5) by composite ARC (4) that comprises three types of full-bridge ARC, full-wave ARC and multi-current composite ARC. The output form this invention is three-level wave form with little high-frequency component to decrease volume and weight for output filter and improve converter's dynamic response character; the invention can also decrease on-state loss and increase efficiency by realizing zero-voltage switch on home position switching tube and zero current switch on sub side switching tube in full load range.

Description

The soft-switch isolated DC converter of three level output
One, technical field
The soft-switch isolated DC converter of three level output of the present invention, the DC converter of genus transformation of electrical energy device.
Two, background technology
Along with the fast development of electronics and information industry, more and more higher requirement has been proposed for volume, weight and the efficient of supply unit, output dynamic property etc.Input, output filter is the principal element that influence converter volume, weight, reduces to import, the volume of output filter has very important meaning to the raising power density of transform.In the existing isolated DC converter, the output voltage waveforms behind the rectifying and wave-filtering generally all is high level and zero level two voltage waveforms, adopts raising switching frequency or multichannel crisscross parallel technology to reduce the volume of output filter on the engineering usually.Yet, improve switching frequency the loss of switching loss and magnetic element is increased, reduce conversion efficiency, so switching frequency can not improve unrestrictedly.Multichannel crisscross parallel technology will make the quantity of magnetic element increase, and the ripple current of every road inductance is bigger, is unfavorable for improving the efficient of converter, and the control circuit complexity, reduce the reliability of converter.Three-level DC converter has reduced the voltage stress of switching tube, is applicable to the occasion of high pressure input, but remains two level waveforms on the output filter.Calendar year 2001 professor Ruan Xinbo has proposed crisscross parallel ortho-exciting three-level DC inverter and combined full-bridge three-level direct current converter.Three level waveforms can be obtained on these two kinds of converter output filters, output filter can be effectively reduced.But these two kinds of converters all need to import dividing potential drop electric capacity, have increased the volume and weight of converter.In addition, the crisscross parallel ortho-exciting three-level DC inverter can not be realized the soft switch of switching tube, and the scope that two hysteresis switching tubes of combined full-bridge three-level direct current converter are realized soft switch is narrower.
Three, summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of soft-switch isolated DC converter of three level output.Three level waveforms can be obtained on the output filter, output inductor can be effectively reduced.Realize the zero voltage switch of former limit switching tube, realize that the Zero Current Switch and the converter on-state loss of secondary-side switch pipe is little, the conversion efficiency height.
The soft-switch isolated DC converter of three level output of the present invention is connected in high-frequency isolation transformer by input direct voltage through high-frequency inverter circuit, it is characterized in that the output of high-frequency isolation transformer is connected in filter circuit through compound active rectifying circuit.Compound active rectifying circuit is composed in series by diode rectifier circuit and active rectifying circuit.Wherein high-frequency inverter circuit can adopt interleaving shunt-wound two-transistor forward power circuit, interleaved series double tube positive exciting circuit of half-bridge circuit, full-bridge circuit, push-pull circuit, push-pull ortho-exciting circuit, tri-level circuit, crisscross parallel active clamp forward circuit, interleaving shunt-wound two-transistor forward power circuit, shared former limit fly-wheel diode etc.Compound active rectifying circuit can adopt the compound active rectifying circuit of full-bridge, the compound active rectifying circuit of all-wave and doubly flow compound active rectifying circuit etc.
The present invention compared with prior art can obtain three level waveforms on output filter, can reduce the volume and weight of output filter, and improves the dynamic response characteristic of converter.The pulsation of converter input current is very little, can reduce input filter.Utilize transformer magnetizing current in full-load range, to realize the zero voltage switch of former limit switching tube, realize the Zero Current Switch of secondary-side switch pipe, and the on-state loss of converter is little, has improved the efficient and the power density of converter.
Four, description of drawings
Accompanying drawing 1 is the circuit structure block diagram of the soft-switch isolated DC converter of three level output of the present invention.Label title in the accompanying drawing 1: 1. input direct voltage Vin, 2. high-frequency inverter circuit, 3. high-frequency isolation transformer Tr, 4. compound active rectifying circuit, 5. filter circuit, 6. load RLd.
Accompanying drawing 2 is high-frequency inverter circuit forming circuit schematic diagrames of the present invention.Wherein accompanying drawing 2 (a) is a half-bridge circuit, accompanying drawing 2 (b) is a full-bridge circuit, accompanying drawing 2 (c) is a push-pull circuit, accompanying drawing 2 (d) is the push-pull ortho-exciting circuit, accompanying drawing 2 (e) is a tri-level circuit, and accompanying drawing 2 (f) is the crisscross parallel active clamp forward circuit, and accompanying drawing 2 (g) is the interleaving shunt-wound two-transistor forward power circuit, accompanying drawing 2 (h) is the interleaving shunt-wound two-transistor forward power circuit of shared former limit fly-wheel diode, and accompanying drawing 2 (i) is an interleaved series double tube positive exciting circuit.
Accompanying drawing 3 is compound active rectifying circuit forming circuit schematic diagrames of the present invention.Wherein accompanying drawing 3 (a) is the compound active rectifying circuit of full-bridge, and accompanying drawing 3 (b) is the compound active rectifying circuit of all-wave, and accompanying drawing 3 (c) is doubly to flow compound active rectifying circuit.
Accompanying drawing 4 has provided the derivation thinking of the soft-switch isolated DC converter of three level output of the present invention, adopts half-bridge circuit, secondary to adopt the circuit structure of the compound active rectifying circuit of full-bridge to describe with former limit.
Accompanying drawing 5 is that former limit adopts half-bridge circuit, secondary to adopt the soft-switch isolated DC converter electrical block diagram of the three level output of the compound active rectifying circuit formation of full-bridge.
Accompanying drawing 6 is that former limit adopts half-bridge circuit, secondary to adopt the main waveform schematic diagram of the soft-switch isolated DC converter of the three level output that the compound active rectifying circuit of full-bridge constitutes.
Accompanying drawing 7 is that former limit adopts half-bridge circuit, secondary to adopt the high-frequency isolation transformer former limit winding voltage and the primary current waveform schematic diagram of the soft-switch isolated DC converter of the three level output that the compound active rectifying circuit of full-bridge constitutes.
Accompanying drawing 8-12 is that former limit adopts half-bridge circuit, secondary to adopt the equivalent circuit structure schematic diagram of the soft-switch isolated DC converter of the three level output that the compound active rectifying circuit of full-bridge constitutes.
Main designation in the above-mentioned accompanying drawing: Vin---supply voltage.Q1～Q4, QS1～QS2---power switch pipe.The parasitic capacitance of C1～C4---power switch pipe.The body diode of D1～D4---power switch pipe.DC1～DC4---clamping diode.Cd1～Cd2---input dividing potential drop electric capacity.Cc, Cc1, Cc2---clamping capacitance.CSS---striding capacitance.Tr---high-frequency isolation transformer; The former secondary no-load voltage ratio of transformer is K.Lr1, Lr2---transformer leakage inductance.NP1, NP2---the former limit of high-frequency isolation transformer winding; NS, NS1, NS2, NS3, NS4---high-frequency isolation transformer secondary winding.DR1, DR2, DR3, DR4, DR5, DR6---output rectifier diode.Lf, Lf1, Lf2---output inductor.Cf---output filter capacitor.RLd---load.Vpri---the former limit of transformer winding voltage.Vpri---the former limit of transformer winding voltage.Vrect---secondary commutating voltage waveform.Iin---converter input current.Ipri-mag---transformer magnetizing current.Ipri-load---output current is converted the current value on former limit.Ipri-total---the former limit of transformer total current.
Five, embodiment
Accompanying drawing 1 is the circuit structure block diagram of the soft-switch isolated DC converter of three level output of the present invention.Be connected in the input of high-frequency inverter circuit 2 by input direct voltage 1, its output is connected in compound active rectifying circuit 4 and filter circuit 5 through high-frequency isolation transformer 3, links to each other with load 6 at last.Accompanying drawing 2 is high-frequency inverter circuit forming circuit schematic diagrames of the present invention.High-frequency inverter circuit can adopt Fig. 2 (a) to circuit structures such as the interleaving shunt-wound two-transistor forward power circuit of the half-bridge circuit shown in Fig. 2 (i), full-bridge circuit, push-pull circuit, push-pull ortho-exciting circuit, tri-level circuit, crisscross parallel active clamp forward circuit, interleaving shunt-wound two-transistor forward power circuit, shared former limit fly-wheel diode and interleaved series double tube positive exciting circuit.Accompanying drawing 3 is compound active rectifying circuit forming circuit schematic diagrames of the present invention, can adopt Fig. 3 (a) to full-bridge, the all-wave shown in Fig. 3 (c) with doubly flow three kinds of compound active rectifier systems.The composition of the compound active rectifying circuit of full-bridge shown in the accompanying drawing 3 (a) is, the end of the same name of the high-frequency isolation transformer secondary first winding NS1 is connected on the tie point that the source electrode of the drain electrode of the first power switch pipe QS1 and the second power switch pipe QS2 links to each other, the source electrode of the first power switch pipe QS1 is connected in the anode of the first rectifier diode DR1, the drain electrode of the second power switch pipe QS2 is connected in the negative electrode of the second rectifier diode DR1, the negative electrode of the anode of the 3rd rectifier diode DR3 and the 4th rectifier diode DR4 is connected on the high-frequency isolation transformer secondary first winding NS1 different name end and the tie point that second winding NS2 end of the same name links to each other simultaneously, the negative electrode of the anode of the 5th rectifier diode DR5 and the 6th rectifier diode DR6 is connected on the different name end of the high-frequency isolation transformer secondary second winding NS2 simultaneously, first, three, three rectifier diode DR1 of five, DR3, the negative electrode of DR5 interconnects, and second, four, three rectifier diode DR2 of six, DR4, the negative electrode of DR6 interconnects.The composition of the compound active rectifying circuit of all-wave shown in the accompanying drawing 3 (b) is, in two windings of four series aiding connection windings of high-frequency isolation transformer secondary NS1, NS2, NS3, NS4 both sides, the end of the same name of the first winding NS1 is connected in the drain electrode of the first power switch pipe QS1, and its source electrode links to each other with the anode of the first rectifier diode DR1; The different name end of the 4th winding NS4 is connected in the drain electrode of the second power switch pipe QS2, its source electrode links to each other with the anode of the 4th rectifier diode DR4, the series connection point in the centre of three series connection points of four series aiding connection windings of high-frequency isolation transformer secondary is directly connected in filter capacitor Cf negative pole, two series connection points link to each other with the anode of the second rectifier diode DR2 and the anode of the 3rd rectifier diode DR3 respectively in addition, and the negative electrode of above-mentioned four rectifier diodes is connected in the input of filter inductance Lf simultaneously.The composition that doubly flows compound active rectifying circuit shown in the accompanying drawing 3 (c) is, in two windings of three series aiding connection windings of high-frequency isolation transformer secondary NS1, NS2, NS3 both sides, the end of the same name of the first winding NS1 is connected in the drain electrode of the first power switch pipe QS1, and its source electrode links to each other with the anode of the first rectifier diode DR1; The different name end of tertiary winding NS3 is connected in the drain electrode of the second power switch pipe QS2, its source electrode links to each other with the anode of the 4th rectifier diode DR4, two series connection points of three series connection windings are connected in the anode of the second rectifier diode DR2 and the anode of the 3rd rectifier diode DR3 respectively, four rectifier diode DR1, DR2, DR3, the negative electrode of DR4 is interconnected in filter capacitor Cf negative pole, the anode of the second rectifier diode DR2 and the 3rd rectifier diode DR3 in the middle of the filter inductance Lf1 of two series connection and the two ends of Lf2 are connected on respectively, the series connection point of the filter inductance of two series connection is connected in filter capacitor Cf positive pole.It is example that accompanying drawing 4 adopts the circuit structure of half-bridge circuit, the compound active rectifying circuit of secondary employing full-bridge with former limit, has provided the derivation thinking of the soft-switch isolated DC converter of three level output of the present invention.Constitute by half-bridge commutator transformer and active rectification half-bridge DC converter, the former limit high-frequency inverter circuit of two shared high-frequency isolation transformer of converter, secondary adopts the mode of Transformer Winding tandem compound.The complementary work of former limit high-frequency inverter circuit maximum duty cycle, the drive signal of the compound active rectifying circuit switching tube of secondary lag behind respectively former limit switching tube phase place, i.e. a phase shifting angle.Regulate output voltage by the size of regulating phase shifting angle.
Adopt half-bridge circuit, secondary to adopt the soft-switch isolated DC converter of the three level output of the compound active rectifying circuit formation of full-bridge to set forth the operation principle of this family's converter by former limit.Accompanying drawing 5 is that former limit adopts half-bridge circuit, secondary to adopt the soft-switch isolated DC converter electrical block diagram of the three level output of the compound active rectifying circuit formation of full-bridge.Accompanying drawing 6 is that former limit adopts half-bridge circuit, secondary to adopt the main waveform schematic diagram of the soft-switch isolated DC converter of the three level output that the compound active rectifying circuit of full-bridge constitutes.Accompanying drawing 7 is that former limit adopts half-bridge circuit, secondary to adopt the soft-switch isolated DC converter high-frequency isolation transformer former limit winding voltage and the primary current waveform schematic diagram of the three level output of the compound active rectifying circuit formation of full-bridge.By accompanying drawing 6 as can be known converter a switch periods 14 kinds of switch mode are arranged, be respectively [t0 was in the past], [t0, t1], [t1, t2], [t2, t3], [t3, t4], [t4, t5], [t5, t6], [t6, t7], [t7, t8], [t8, t9] (seeing accompanying drawing 6), wherein [t0 in the past, t4] is the preceding half period, and [t4, t9] is the later half cycle.Below the working condition of each switch mode is made a concrete analysis of (seeing accompanying drawing 8-12).
Control method is as follows: switching tube Q1 and Q2 are 180 ° of complementary conductings, switching tube QS1 and QS2 also are 180 ° of complementary conductings, switching tube QS1 and QS2 are open-minded with respect to switching tube Q1 and phase place of Q2 hysteresis respectively, and promptly phase shifting angle is regulated output voltage by the size of regulating phase shifting angle.Control chip can adopt a slice UC3895.
Before analyzing, make the following assumptions: 1. all switching tubes and diode are desirable device; 2. all inductance, electric capacity and transformer are ideal element; 3. filtering Cf is enough big, can equivalence be a voltage source V o.
1. before the switch mode 1[t0] [corresponding to accompanying drawing 8]
T0 in the past, switching tube Q1 conducting, switching tube Q2, QS1, QS2 turn-off, secondary rectifier diode DR3, DR6 conducting, converter by Transformer Winding NS2 to the load transfer energy.
2. switch mode 2[t 0, t 1] [corresponding to accompanying drawing 9]
t 0Constantly open switching tube Q S1, because switching tube Q is flow through in the effect of transformer leakage inductance S1Current i Ns2Slowly rise, be approximately zero current turning-on.
3. switch mode 3[t 1, t 2] [corresponding to accompanying drawing 10]
t 1Moment current i Qs1Rise to load current, secondary rectifier diode D R3End Transformer Winding N S1, N S2Series connection is to the load transfer energy.
4. switch mode 4[t 2, t 3] [corresponding to accompanying drawing 11]
t 2Moment on-off switching tube Q 1, primary current i PriGive capacitor C 1Capacitor C is given in charging simultaneously 2Discharge, capacitor C 1, C 2Make switching tube Q 1For no-voltage is turn-offed, the former secondary current of transformer begins to descend.
5. switch mode 5[t 3, t 4] [corresponding to accompanying drawing 12]
t 3Constantly, switching tube Q 1Both end voltage rises to V In, switching tube Q 2Both end voltage drops to zero, and can no-voltage open switching tube Q this moment 2t 4Constantly, on-off switching tube Q S1, this moment i Qs1Dropped to zero, switching tube Q S1Be zero-current switching.After this converter begins second half cycling, and its working condition is similar to above-mentioned half period.
Accompanying drawing 7 has provided converter former limit winding voltage and primary current waveform, as seen from the figure, there is not the circulation stage in converter, and the mean value of exciting current is zero in the half period, therefore exciting current can not increase the effective value of primary current, and the converter on-state loss is little.And the size of exciting current and output voltage and load are irrelevant, therefore can realize the zero voltage switch of former limit switching tube in whole loading range.
As seen from the above description, the soft-switch isolated DC converter of the three level output of the present invention's proposition has following advantage:
1. be three level waveforms on the output filter, high fdrequency component is little, can reduce the volume and weight of output filter, improves the dynamic response characteristic of converter.
2. the pulsation of converter input current is very little, can reduce input filter.
3. utilize transformer magnetizing current in full-load range, to realize the zero voltage switch of former limit switching tube, realize the Zero Current Switch of secondary-side switch pipe.
4. exciting current does not increase the on-state loss of converter, has improved the efficient and the power density of converter.

Claims (4)

1, a kind of soft-switch isolated DC converter of three level output, be connected in high-frequency isolation transformer (3) by input direct voltage (1) through high-frequency inverter circuit (2), it is characterized in that high-frequency isolation transformer output is connected in filter circuit (5) through compound active rectifying circuit (4), described compound active rectifying circuit (4) is respectively the compound active rectifying circuit of full-bridge, and the compound active rectifying circuit of all-wave reaches and doubly flows three kinds of compound active rectifying circuits of compound active rectifying circuit.
2, soft-switch isolated DC converter according to the described three level output of claim 1, it is characterized in that, the composition of the compound active rectifying circuit of full-bridge is, the end of the same name of high-frequency isolation transformer secondary first winding (NS1) is connected in the drain electrode and the second power switch pipe QS2 of first power switch pipe (QS1)) the tie point that links to each other of source electrode on, the source electrode of first power switch pipe (QS1) is connected in the anode of first rectifier diode (DR1), the drain electrode of second power switch pipe (QS2) is connected in the negative electrode of second rectifier diode (DR1), the negative electrode of the anode of the 3rd rectifier diode (DR3) and the 4th rectifier diode (DR4) is connected on high-frequency isolation transformer secondary first winding (NS1) different name end and the tie point that second winding (NS2) end of the same name links to each other simultaneously, the negative electrode of the anode of the 5th rectifier diode (DR5) and the 6th rectifier diode (DR6) is connected on the different name end of high-frequency isolation transformer secondary second winding (NS2) simultaneously, first, three, three rectifier diodes (DR1) of five, (DR3), (DR5) negative electrode interconnects, and second, four, three rectifier diodes (DR2) of six, (DR4), (DR6) negative electrode interconnects.
3, the soft-switch isolated DC converter of exporting according to described three level of claim 1, it is characterized in that, the composition of the compound active rectifying circuit of all-wave is, in two windings of four series aiding connection windings of high-frequency isolation transformer secondary (NS1), (NS2), (NS3), (NS4) both sides, the end of the same name of first winding (NS1) is connected in the drain electrode of first power switch pipe (QS1), and its source electrode links to each other with the anode of first rectifier diode (DR1); The different name end of the 4th winding (NS4) is connected in the drain electrode of second power switch pipe (QS2), its source electrode links to each other with the anode of the 4th rectifier diode (DR4), the series connection point in the centre of three series connection points of four series aiding connection windings of high-frequency isolation transformer secondary is directly connected in filter capacitor (Cf) negative pole, two series connection points link to each other with the anode of second rectifier diode (DR2) and the anode of the 3rd rectifier diode (DR3) respectively in addition, and the negative electrode of above-mentioned four rectifier diodes is connected in the input of filter inductance (Lf) simultaneously.
4, the soft-switch isolated DC converter of exporting according to described three level of claim 1, it is characterized in that, the composition that doubly flows compound active rectifying circuit is, in two windings of three series aiding connection windings of high-frequency isolation transformer secondary (NS1), (NS2), (NS3) both sides, the end of the same name of first winding (NS1) is connected in the drain electrode of first power switch pipe (QS1), and its source electrode links to each other with the anode of first rectifier diode (DR1); The different name end of the tertiary winding (NS3) is connected in the drain electrode of second power switch pipe (QS2), its source electrode links to each other with the anode of the 4th rectifier diode (DR4), two series connection points of three series connection windings are connected in the anode of second rectifier diode (DR2) and the anode of the 3rd rectifier diode (DR3) respectively, four rectifier diodes (DR1), (DR2), (DR3), (DR4) negative electrode is interconnected in filter capacitor (Cf) negative pole, the anode of second rectifier diode (DR2) and the 3rd rectifier diode (DR3) in the middle of filter inductance of two series connection (Lf1) and two ends (Lf2) are connected on respectively, the series connection point of the filter inductance of two series connection is connected in filter capacitor (Cf) positive pole.
CNB2005100413700A 2005-08-08 2005-08-08 Three-level output soft-switch isolated DC converter Expired - Fee Related CN100379131C (en)

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CN103633734B (en) * 2007-05-29 2016-03-02 Abb技术有限公司 Power-supply device
CN107086791A (en) * 2017-06-09 2017-08-22 黑龙江大学 With double circuit, the staggered switching power unit of many circuits input series connection for eliminating circulation function
CN109361323A (en) * 2018-11-14 2019-02-19 厦门科华恒盛股份有限公司 I type three-level soft switch circuit and corresponding three-phase translation circuit and converter plant
CN110212768A (en) * 2019-05-17 2019-09-06 福建星云电子股份有限公司 A kind of high no-load voltage ratio bi-directional half bridge times current converter
CN115173730A (en) * 2022-07-08 2022-10-11 青岛理工大学 Safe current conversion method of single-stage high-frequency isolation converter for bidirectional power transmission
CN115514287A (en) * 2022-11-17 2022-12-23 湖北东湖实验室 Flywheel energy storage control system and control, protection and rotor position angle redundancy method thereof
CN115882733A (en) * 2023-02-21 2023-03-31 成都必控科技有限责任公司 Topological circuit combining full-bridge switching power supply and push-free switching power supply
CN117639494A (en) * 2023-12-04 2024-03-01 山东艾诺智能仪器有限公司 Low-loss multipath four-quadrant linear power supply and control method thereof

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JP3665934B2 (en) * 2001-08-03 2005-06-29 株式会社日立製作所 3-level inverter device
CN1173455C (en) * 2002-06-20 2004-10-27 南京航空航天大学 Alternatively parallel three-level converter excited by positive voltage
JP4380280B2 (en) * 2003-09-26 2009-12-09 富士電機ホールディングス株式会社 3-level inverter
CN100353652C (en) * 2004-10-13 2007-12-05 南京航空航天大学 Combined type full-bridge three-level DC converter and full-bridge three-level DC converter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633734B (en) * 2007-05-29 2016-03-02 Abb技术有限公司 Power-supply device
CN107086791A (en) * 2017-06-09 2017-08-22 黑龙江大学 With double circuit, the staggered switching power unit of many circuits input series connection for eliminating circulation function
CN107086791B (en) * 2017-06-09 2023-09-19 黑龙江大学 Double-circuit and multi-circuit input series staggered switching power supply device with circulation eliminating function
CN109361323A (en) * 2018-11-14 2019-02-19 厦门科华恒盛股份有限公司 I type three-level soft switch circuit and corresponding three-phase translation circuit and converter plant
CN109361323B (en) * 2018-11-14 2020-05-15 科华恒盛股份有限公司 I-type three-level soft switching circuit and corresponding three-phase conversion circuit and converter
CN110212768A (en) * 2019-05-17 2019-09-06 福建星云电子股份有限公司 A kind of high no-load voltage ratio bi-directional half bridge times current converter
CN115173730A (en) * 2022-07-08 2022-10-11 青岛理工大学 Safe current conversion method of single-stage high-frequency isolation converter for bidirectional power transmission
CN115514287A (en) * 2022-11-17 2022-12-23 湖北东湖实验室 Flywheel energy storage control system and control, protection and rotor position angle redundancy method thereof
CN115514287B (en) * 2022-11-17 2023-02-17 湖北东湖实验室 Flywheel energy storage control system and control, protection and rotor position angle redundancy method thereof
CN115882733A (en) * 2023-02-21 2023-03-31 成都必控科技有限责任公司 Topological circuit combining full-bridge switching power supply and push-free switching power supply
CN117639494A (en) * 2023-12-04 2024-03-01 山东艾诺智能仪器有限公司 Low-loss multipath four-quadrant linear power supply and control method thereof

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