CN102751876A - Isolation type new energy power supply equipment based on three-port power converter - Google Patents

Isolation type new energy power supply equipment based on three-port power converter Download PDF

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Publication number
CN102751876A
CN102751876A CN2012102481539A CN201210248153A CN102751876A CN 102751876 A CN102751876 A CN 102751876A CN 2012102481539 A CN2012102481539 A CN 2012102481539A CN 201210248153 A CN201210248153 A CN 201210248153A CN 102751876 A CN102751876 A CN 102751876A
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China
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new energy
main switch
energy
coupling inductance
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CN2012102481539A
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Chinese (zh)
Inventor
胡义华
徐惠
邓焰
龙江涛
路晓寻
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN2012102481539A priority Critical patent/CN102751876A/en
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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
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Abstract

The invention discloses isolation type new energy power supply equipment based on a three-port power converter. The isolation type new energy power supply equipment consists of a new energy battery, an energy storage device, an inverse resistance diode, two coupling inductors, four main switching tubes, two clamping switching tubes, two clamping capacitors, two rectifier diodes and two filter capacitors which are mutually connected. By adoption of a staggered parallel structure, the phases of the main switching tubes are controlled, and low ripples of the input current can be realized, so that the maximum power point tracking control of the new energy battery is easily realized; and meanwhile, by adoption of an active clamping structure, soft switching of the main switching tubes can be realized, so that the loss is reduced, and the efficiency is improved. In addition, by adoption of the series structure of two coupling inductors on the load side, high boosting capacity can be realized; the new energy battery can supply power to the load side and can supply power to a storage battery during operation; and when the new energy battery does not work, the new energy battery also can supply power to the load side through the storage battery.

Description

A kind of isolated form is based on the new energy equipment of three port power inverters
Technical field
The invention belongs to new forms of energy power conversion technology field, be specifically related to the new energy equipment of a kind of isolated form based on three port power inverters.
Background technology
In the new energy system; Because the electric energy that new forms of energy produce all is the lower direct current of voltage; And (like grid-connected system) needs the higher direct current of voltage in the plurality of applications scene, so the new energy system all has power inverter and converts low voltage and direct current into suitable high-voltage direct-current; In addition, power inverter also need be responsible for energy management and the control between new forms of energy, storage battery, the load three.
The output voltage gain of conventional booster type (Boost) crisscross parallel DC-DC converter is less; The voltage stress of power switch pipe is bigger, and power switch pipe is hard switching work, and switching loss is bigger; The reverse recovery current of fly-wheel diode is bigger, and reverse recovery loss is bigger.In recent years, study some soft switch circuits in succession, realized the soft switch of power switch pipe through devices such as extra active power switch and passive inductance, electric capacity or through devices such as additional diode and passive inductance, electric capacity.
Thereby in actual new energy system for realize being incorporated into the power networks or autonomous system in the continuation of energy need add storage battery and realize schedulable system.Need a plurality of power transducer devices or multilevel device for this reason, thereby increased the complexity and the cost of system's control.So traditional new energy system is as shown in Figure 1, this system needs two cover power transducer devices to realize the power transfer of new forms of energy-storage battery, new forms of energy-load and storage battery-load; And a large amount of power conversion device costs is high, efficient is low.
As shown in Figure 2, can well solve the many problems of conventional power converters part based on the new energy system of three port power inverters; Wherein typical a kind of structure is as shown in Figure 3, and the advantage of this circuit structure is that used switching tube is less, but shortcoming is also clearly, and major defect is following:
(1) so, utilizes this topological structure can not be utilized in the bigger occasion of power because be that single magnetic core structure through-put power is limited;
(2) thus because the essence of this circuit is that half-bridge structure exists the secondary boost capability limited, thereby limited the application that this topological structure is had a meeting, an audience, etc. well under one's control and closed in promotion, for example input source is photovoltaic cell, fuel cell, output loading is to be incorporated into the power networks or the inverter of independent operating;
(3) because the primary current ripple is bigger, for example fuel cell or photovoltaic battery panel under the situation of needs control input source best operating point, this topology in control, will run into very big difficulty.
Summary of the invention
To the above-mentioned technological deficiency of existing in prior technology, the invention provides the new energy equipment of a kind of isolated form based on three port power inverters, can realize the soft switch of switching tube, primary current hangs down ripple, and power conversion efficiency is high.
A kind of isolated form comprises based on the new energy equipment of three port power inverters: a new forms of energy battery, an energy accumulator, a contrary resistance diode, two coupling inductances, four main switches, two clamping switch tubes, two clamp capacitors, two rectifier diodes and two filter capacitors; Wherein:
The positive pole of new forms of energy battery links to each other with the anode of contrary resistance diode; The negative electrode of contrary resistance diode links to each other with the drain electrode of first main switch and the drain electrode of second main switch; The source electrode of first main switch links to each other with the drain electrode of the 3rd main switch, the source electrode of first clamping switch tube and the non-same polarity of the first coupling inductance primary coil; The source electrode of second main switch links to each other with the drain electrode of the 4th main switch, the source electrode of second clamping switch tube and the non-same polarity of the second coupling inductance primary coil; The source electrode of the 3rd main switch links to each other with the source electrode of the 4th main switch and the negative pole of energy accumulator; The drain electrode of first clamping switch tube links to each other with an end of first clamp capacitor; The drain electrode of second clamping switch tube links to each other with an end of second clamp capacitor, and the negative pole of new forms of energy battery links to each other with the other end of first clamp capacitor, the other end of second clamp capacitor, the end of the same name of the first coupling inductance primary coil, the end of the same name of the second coupling inductance primary coil and the positive pole of energy accumulator;
The non-same polarity of the first coupling inductance secondary coil links to each other with the non-same polarity of the second coupling inductance secondary coil; The end of the same name of the second coupling inductance secondary coil links to each other with the negative electrode of the anode of first rectifier diode and second rectifier diode; The end of the same name of the first coupling inductance secondary coil links to each other with an end of an end of first filter capacitor and second filter capacitor; The negative electrode of first rectifier diode links to each other with the other end of first filter capacitor and constitutes positive output end, and the anode of second rectifier diode links to each other with the other end of second filter capacitor and constitutes negative output terminal;
The grid of described main switch and the grid of clamping switch tube all receive the control signal that external equipment provides.
Described main switch and clamping switch tube all adopt the NMOS pipe.
The new forms of energy battery is a kind of device that directly changes into regenerative resource (like nuclear energy, solar energy, wind energy, biomass energy, geothermal energy etc.) electric energy, and preferably, described new forms of energy battery is a photovoltaic cell; With respect to other new forms of energy batteries, it does not receive environmental limitations, and is easy to use.
Energy accumulator is a kind of device (like storage battery, super capacitor etc.) that is used for storage of electrical energy, and preferably, described energy accumulator is a storage battery; It has higher energy storage density, and low price, has universality.
Operation principle of the present invention is:
When the new forms of energy battery can be worked; First main switch and the second main switch work, clamping switch tube is not worked, the electric energy powering load of new forms of energy battery output; Energy in the leakage inductance in first coupling inductance and second coupling inductance charges a battery, and ability limit switch tube voltage stress; When the new forms of energy battery is not worked; Storage battery is through sequential turn-on the 3rd main switch, the 4th main switch, first clamping switch tube, the second clamping switch tube powering load; The 3rd main switch and first clamping switch tube constitute soft switch circuit, and the 4th main switch and second clamping switch tube constitute soft switch circuit.
The present invention adopts Interleaving and Transformer Paralleling, can well improve the power delivery ability of equipment, and its power delivery ability can extend to 10KW; Owing to be the structure of crisscross parallel, the phase place through the control main switch can realize the low ripple of input current, thereby is easy to realize the MPPT maximum power point tracking control of new forms of energy battery; Simultaneously, the present invention has adopted the active clamp structure can realize the soft switch of main switch, thereby has reduced loss, has improved efficient; In addition, the present invention has adopted two coupling inductance formulas of load-side cascaded structure, can realize higher boost capability; When new forms of energy are battery operated, both can supply power, can supply power by accumulators simultaneously to load-side; When the new forms of energy battery is not worked, still can supply power to load-side through storage battery.
Description of drawings
Fig. 1 is the structural representation based on the new energy system of many power inverters.
Fig. 2 is the structural representation based on the new energy system of three port power inverters.
Fig. 3 is the electrical block diagram of tradition based on the new energy system of three port power inverters.
Fig. 4 is the electrical block diagram of new energy of the present invention system.
The circuit theory sketch map of Fig. 5 Power Conversion operating state 1 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Fig. 6 Power Conversion operating state 2 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Fig. 7 Power Conversion operating state 3 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Fig. 8 Power Conversion operating state 4 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Fig. 9 Power Conversion operating state 5 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Figure 10 Power Conversion operating state 6 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Figure 11 Power Conversion operating state 7 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Figure 12 Power Conversion operating state 8 during for supplying power for photovoltaic cell of the present invention.
The circuit theory sketch map of Figure 13 Power Conversion operating state 1 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 14 Power Conversion operating state 2 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 15 Power Conversion operating state 3 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 16 Power Conversion operating state 4 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 17 Power Conversion operating state 5 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 18 Power Conversion operating state 6 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 19 Power Conversion operating state 7 during for storage battery power supply of the present invention.
The circuit theory sketch map of Figure 20 Power Conversion operating state 8 during for storage battery power supply of the present invention.
Embodiment
In order to describe the present invention more particularly, technical scheme of the present invention and operation principle thereof are elaborated below in conjunction with accompanying drawing and embodiment.
As shown in Figure 4, a kind of isolated form comprises based on the new energy equipment of three port power inverters: a photovoltaic cell F, a storage battery E, a contrary resistance diode D, two coupling inductance L 1～L 2, four main switch S 1～S 4, two clamping switch tube Q 1～Q 2, two clamp capacitor C 1～C 2, two rectifier diode Z 1～Z 2With two filter capacitor Co 1～Co 2Wherein:
The positive pole of photovoltaic cell F links to each other with the anode of contrary resistance diode D, the negative electrode and the first main switch S of contrary resistance diode D 1The drain electrode and the second main switch S 2Drain electrode link to each other the first main switch S 1Source electrode and the 3rd main switch S 3Drain electrode, the first clamping switch tube Q 1The source electrode and the first coupling inductance L 1The non-same polarity of primary coil links to each other, the second main switch S 2Source electrode and the 4th main switch S 4Drain electrode, the second clamping switch tube Q 2The source electrode and the second coupling inductance L 2The non-same polarity of primary coil links to each other, the 3rd main switch S 3Source electrode and the 4th main switch S 4Source electrode and the negative pole of storage battery E link to each other the first clamping switch tube Q 1The drain electrode and the first clamp capacitor C 1An end link to each other the second clamping switch tube Q 2The drain electrode and the second clamp capacitor C 2An end link to each other the negative pole of photovoltaic cell F and the first clamp capacitor C 1The other end, the second clamp capacitor C 2The other end, the first coupling inductance L 1The end of the same name of primary coil, the second coupling inductance L 2The end of the same name of primary coil links to each other with the positive pole of storage battery E;
The first coupling inductance L 1The non-same polarity of secondary coil and the second coupling inductance L 2The non-same polarity of secondary coil links to each other, the second coupling inductance L 2The end of the same name of secondary coil and the first rectifier diode Z 1The anode and the second rectifier diode Z 2Negative electrode link to each other the first coupling inductance L 1The end of the same name of secondary coil and the first filter capacitor Co 1An end and the second filter capacitor Co 2An end link to each other the first rectifier diode Z 1The negative electrode and the first filter capacitor Co 1The other end link to each other and the end of connecting resistance load R the second rectifier diode Z 2The anode and the second filter capacitor Co 2The other end link to each other and the other end of connecting resistance load R;
Main switch S 1～S 4Grid and clamping switch tube Q 1～Q 2Grid all receive the control signal that external equipment provides; In this execution mode, main switch S 1～S 4With clamping switch tube Q 1～Q 2All adopt the NMOS pipe.
This execution mode divides following two kinds of operating states:
(1) photovoltaic cell F normal operation (daytime is sunny), the output loop energy is provided by photovoltaic cell F, clamping switch tube Q 1～Q 2Be in normally off, do not participate in the course of work; Circuit working state comprises following process:
Operating state 1 (as shown in Figure 5), main switch S 1, S 2All open-minded, Q 1, Q 2Turn-off, coupling inductance former limit energy storage under the input voltage effect, former limit exciting current is linear to increase capacitor C o 1, Co 2Series connection is supplied power to load R.
Operating state 2 (as shown in Figure 6), S 1Turn-off coupling inductance L 1Exciting current is given S 1The parasitic capacitance charging, switching tube S 1Between voltage linear increase coupling inductance L 2Former limit exciting current continues linear increase, capacitor C o 1, Co 2Series connection is supplied power to load R.
Operating state 3 (as shown in Figure 7), S 1The parasitic capacitance voltage is elevated to rectifier diode Z behind the certain value 2Conducting, coupling inductance L at this moment 1Be operated in anti-swash state, L 2Be operated in the normal shock state, the energy in photovoltaic cell F and the coupling inductance begins to capacitor C o 2Transmit, simultaneously capacitor C o 1, Co 2Series connection is supplied power to load R.
Operating state 4 (as shown in Figure 8), S 1S when the parasitic capacitance voltage is raised to clamping voltage 3Anti-also diode current flow, L 2Continue the linear increase of energy storage electric current, coupling inductance L 1Middle energy is to capacitor C o 2Charging also is storage battery E charging simultaneously.
Operating state 5 (as shown in Figure 9), S 3Open-minded, this moment S 3Open-minded for ZVT, flow through its anti-also diode current rapidly to S 3Shift.
Operating state 6 (shown in figure 10), S 3Turn-off leakage inductance L 1With switching tube S 1Parasitic capacitance resonance, the part energy on the leakage inductance is transmitted to load R, and another part is to L 2Transmit.
Operating state 7 (shown in figure 11), S 1The parasitic capacitance voltage reduces to 0, parasitic capacitance and leakage inductance L 1Resonant process finishes, at this moment S 1Anti-also diode current flow afterflow, the leakage inductance electric current is at capacitor C o 2Voltage effect lower linear descend.
Operating state 8 (shown in figure 12), S 1Conducting, S at this moment 1Open-minded for ZVT, rectifier diode continues the afterflow conducting and reduces to 0 until electric current, diode Z 2End.This moment S 1, S 2All open-minded, former limit exciting current is linear to increase capacitor C o 1, Co 2Series connection is supplied power to load R.
Switching tube S 2Operating state in one-period and S 1In like manner.
(2) do not work (night or overcast and rainy unglazed photograph) as photovoltaic cell F, the output loop energy is provided by storage battery E, main switch S 1, S 2Be in normally off, do not participate in the course of work; Circuit working state comprises following process:
Operating state 1 (shown in figure 13), S 3, S 4All open-minded, Q 1, Q 2Turn-off, coupling inductance former limit energy storage under the input voltage effect, former limit exciting current is linear to increase capacitor C o 1, Co 2Series connection is supplied power to load R.
Operating state 2 (shown in figure 14), S 3Turn-off inductance L 1Exciting current is given S 3The parasitic capacitance charging, voltage linear increases between switching tube, L 2Former limit exciting current continues linear increase, capacitor C o 1, Co 2Series connection is supplied power to load R.
Operating state 3 (shown in figure 15), S 3The parasitic capacitance voltage is elevated to rectifier diode Z behind the certain value 1Conducting, coupling inductance L at this moment 1Be operated in anti-swash state, L 2Be operated in the normal shock state, the energy in storage battery E and the coupling inductance begins to capacitor C o 1Transmit, simultaneously capacitor C o 1, Co 2Series connection is supplied power to load R.
Operating state 4 (shown in figure 16), S 3Q when the parasitic capacitance voltage is raised to clamping voltage 1Anti-also diode current flow, L 2Continue the linear increase of energy storage electric current, coupling inductance L 1Middle energy is to output capacitance Co 1Charging.
Operating state 5 (shown in figure 17), Q 1Open-minded, this moment Q 1Open-minded for ZVT, flow through its anti-also diode current rapidly to Q 1Shift.
Operating state 6 (shown in figure 18), Q 1Turn-off leakage inductance L 1With switching tube S 3Parasitic capacitance Cs3 resonance, leakage inductance L 1On part energy transmit to load R, another part transmits to storage battery E.
Operating state 7 (shown in figure 19), S 3The parasitic capacitance voltage reduces to 0, parasitic capacitance and leakage inductance L 1Resonant process finishes, at this moment S 3Anti-also diode current flow afterflow, the leakage inductance electric current is at capacitor C o 1Voltage effect lower linear descend.
Operating state 8 (shown in figure 20), S 3Conducting, S at this moment 3Open-minded for ZVT, rectifier diode continues the afterflow conducting and reduces to 0 until electric current, diode Z 1End.This moment S 3, S 4All open-minded, former limit exciting current is linear to increase capacitor C o 1, Co 2Series connection is supplied power to load R.
Switching tube S 4Operating state in one-period and S 3In like manner.

Claims (4)

1. an isolated form is based on the new energy equipment of three port power inverters; It is characterized in that, comprising: a new forms of energy battery, an energy accumulator, a contrary resistance diode, two coupling inductances, four main switches, two clamping switch tubes, two clamp capacitors, two rectifier diodes and two filter capacitors; Wherein:
The positive pole of new forms of energy battery links to each other with the anode of contrary resistance diode; The negative electrode of contrary resistance diode links to each other with the drain electrode of first main switch and the drain electrode of second main switch; The source electrode of first main switch links to each other with the drain electrode of the 3rd main switch, the source electrode of first clamping switch tube and the non-same polarity of the first coupling inductance primary coil; The source electrode of second main switch links to each other with the drain electrode of the 4th main switch, the source electrode of second clamping switch tube and the non-same polarity of the second coupling inductance primary coil; The source electrode of the 3rd main switch links to each other with the source electrode of the 4th main switch and the negative pole of energy accumulator; The drain electrode of first clamping switch tube links to each other with an end of first clamp capacitor; The drain electrode of second clamping switch tube links to each other with an end of second clamp capacitor, and the negative pole of new forms of energy battery links to each other with the other end of first clamp capacitor, the other end of second clamp capacitor, the end of the same name of the first coupling inductance primary coil, the end of the same name of the second coupling inductance primary coil and the positive pole of energy accumulator;
The non-same polarity of the first coupling inductance secondary coil links to each other with the non-same polarity of the second coupling inductance secondary coil; The end of the same name of the second coupling inductance secondary coil links to each other with the negative electrode of the anode of first rectifier diode and second rectifier diode; The end of the same name of the first coupling inductance secondary coil links to each other with an end of an end of first filter capacitor and second filter capacitor; The negative electrode of first rectifier diode links to each other with the other end of first filter capacitor and constitutes positive output end, and the anode of second rectifier diode links to each other with the other end of second filter capacitor and constitutes negative output terminal;
The grid of described main switch and the grid of clamping switch tube all receive the control signal that external equipment provides.
2. isolated form according to claim 1 is characterized in that based on the new energy equipment of three port power inverters: described main switch and clamping switch tube all adopt the NMOS pipe.
3. isolated form according to claim 1 is characterized in that based on the new energy equipment of three port power inverters: described new forms of energy battery is a photovoltaic cell.
4. isolated form according to claim 1 is characterized in that based on the new energy equipment of three port power inverters: described energy accumulator is a storage battery.
CN2012102481539A 2012-07-18 2012-07-18 Isolation type new energy power supply equipment based on three-port power converter Pending CN102751876A (en)

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CN103208925A (en) * 2013-04-24 2013-07-17 深圳市航天新源科技有限公司 Isolated direct current-direct current (DC-DC) converter topological circuit
CN104133108A (en) * 2013-05-01 2014-11-05 德克萨斯仪器德国股份有限公司 Tracking energy consumption using a boost-buck technique
CN104518672A (en) * 2014-11-21 2015-04-15 深圳市航天新源科技有限公司 Three-port converter with magnetic integration function and zero port current ripples
CN104935167A (en) * 2015-06-30 2015-09-23 华中科技大学 Isolated bridge type three-port DC converter
WO2020224200A1 (en) * 2019-05-09 2020-11-12 广州金升阳科技有限公司 Switching converter and control method therefor
CN112821791A (en) * 2021-02-02 2021-05-18 张超 Direct-current half-voltage-reduction four-quadrant rectifier
CN113162432A (en) * 2021-05-07 2021-07-23 哈工大（张家口）工业技术研究院 Interleaved parallel three-port isolated DC-DC converter

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN103208925A (en) * 2013-04-24 2013-07-17 深圳市航天新源科技有限公司 Isolated direct current-direct current (DC-DC) converter topological circuit
CN104133108A (en) * 2013-05-01 2014-11-05 德克萨斯仪器德国股份有限公司 Tracking energy consumption using a boost-buck technique
CN109490621A (en) * 2013-05-01 2019-03-19 德克萨斯仪器德国股份有限公司 Use buck Technical Follow-Up energy consumption
US10924018B2 (en) 2013-05-01 2021-02-16 Texas Instruments Incorporated Tracking energy consumption using a boost-buck technique
CN109490621B (en) * 2013-05-01 2021-07-23 德克萨斯仪器股份有限公司 Tracking energy consumption using buck-boost techniques
CN104518672A (en) * 2014-11-21 2015-04-15 深圳市航天新源科技有限公司 Three-port converter with magnetic integration function and zero port current ripples
CN104518672B (en) * 2014-11-21 2017-06-06 深圳市航天新源科技有限公司 A kind of integrated three Port Translation devices with zero port current ripple of magnetic
CN104935167A (en) * 2015-06-30 2015-09-23 华中科技大学 Isolated bridge type three-port DC converter
CN104935167B (en) * 2015-06-30 2017-12-12 华中科技大学 A kind of isolated form bridge-type three-port DC converter
WO2020224200A1 (en) * 2019-05-09 2020-11-12 广州金升阳科技有限公司 Switching converter and control method therefor
CN112821791A (en) * 2021-02-02 2021-05-18 张超 Direct-current half-voltage-reduction four-quadrant rectifier
CN113162432A (en) * 2021-05-07 2021-07-23 哈工大（张家口）工业技术研究院 Interleaved parallel three-port isolated DC-DC converter

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Application publication date: 20121024