CN103746563A - Three-level direct current converter of ZVS (zero voltage switch) with dual-bridge wide load range and switch power supply - Google Patents

Three-level direct current converter of ZVS (zero voltage switch) with dual-bridge wide load range and switch power supply Download PDF

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Publication number
CN103746563A
CN103746563A CN201310746203.0A CN201310746203A CN103746563A CN 103746563 A CN103746563 A CN 103746563A CN 201310746203 A CN201310746203 A CN 201310746203A CN 103746563 A CN103746563 A CN 103746563A
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emitter
collector electrode
circuit
former limit
anode
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石勇
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XI'AN ACTIONPOWER ELECTRICAL CO Ltd
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XI'AN ACTIONPOWER ELECTRICAL CO Ltd
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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 invention relates to a three-level direct current converter of ZVS (zero voltage switch) with dual-bridge wide load range. The converter consists of eight self-turn-off devices, two blocking capacitors, two high-frequency transformers and an output rectifying and filtering unit. Two groups of direct current converters share one group of input direct current bus. The converter has the advantages that (1) the structure is simple, and additional vice devices are not required at the primary sides of the transformers; (2) the borne voltage stress of the devices is lower, each switch device bears Uin/2 voltage stress, and the device is suitable for the high-voltage direct current conversion; (3) the control is simple, a matured phase-shifting control method is adopted, and the practicality is higher; (4) the output waveform is in the three-level way, the harmonic content in the output waveform is greatly reduced, the switch frequency is greatly reduced under the same filter condition, and the circuit efficiency is improved; (5) by additionally arranging two resonance inductors, the soft switch range of the self-turn-off devices at the primary sides is expanded, the switch loss of the self-turn-off devices is greatly reduced, and the circuit can be widely applied to the field of direct current switch power supplies.

Description

The wide loading range ZVS of doube bridge three-level DC converter, Switching Power Supply
Technical field
The present invention relates to the wide loading range ZVS(of a kind of doube bridge zero voltage switch) three-level DC converter topology, this circuit can be used for direct-current switch power supply field.
Background technology
Three Level Technology are hot technologys of power electronic technology.In power electronics application, be subject to the impact of device voltage quota, the inevitable version that adopts device series connection in circuit, for the static state, the dynamic voltage balancing problem that solve device series connection must be added equalizer circuit.Along with adding and the increase of number of devices of equalizer circuit, circuit possesses multiple-working mode and multiple output level naturally, by the combination of mode of operation, obtains better output characteristic.The research of three-level DC converter starts from 1992, and the type circuit is widely used in high voltage direct current conversion field, and Chinese patent 200610096757 is one of such technology.2004, Brazilian scholar proposed a kind of novel three-level DC converter, and this circuit adopts input capacitance as former limit clamp circuit, has greatly simplified circuit structure, has a good application prospect.But there are three problems in such circuit:
One, output waveform remains two level waveforms, for not improving aspects such as reducing output filter volume and input capacitance ripple;
Its two, former limit self-turn-off device soft-switching range is little;
Finally, traditional Phase Shift Control Study cannot be applied to this circuit.
Summary of the invention
The object of the invention is to propose the wide loading range ZVS of a kind of doube bridge three level DC translation circuit, solved background technology output waveform and remained the technical problem that two level waveforms, former limit self-turn-off device soft-switching range are little, cannot use phase shifting control.
Technical solution of the present invention is:
The wide loading range ZVS of a kind of doube bridge three-level DC converter, its special character is:
Comprise 8 self-turn-off device S 1～S 8, 2 capacitance C bL1, C bL2, 4 capacitor C in1～C in4, 2 high frequency transformer T 1, T 2, 1 inductance L 1and output rectification filter unit; Described output rectification filter unit comprises 4 diode D o1～D o4, inductance L out, capacitor C out;
Wherein:
S 1collector electrode, S 5collector electrode and C in1one end be connected in 1, as the electrode input end of circuit;
C bL2one end and T 2former limit winding T 2psame Name of Ends be connected in 2;
S 5emitter, S 6collector electrode and C bL2the other end be connected in 3;
C in1the other end, C in2one end and L 1one end be connected in 4;
S 1emitter, S 2collector electrode, L 1the other end and C bL1one end be connected in 5;
C bL1the other end and T 1former limit winding T 1psame Name of Ends be connected in 6;
S 2emitter, S 3collector electrode, S 6emitter, S 7collector electrode, C in2the other end and C in3one end be connected in 7;
S 7emitter, S 8collector electrode, T 2former limit winding T 2pthe other end and L 2one end be connected in 8;
C in3the other end, C in4one end and L 2the other end be connected in 9;
S 3emitter, S 4collector electrode and transformer T 1former limit winding T 1pthe other end be connected in 10;
S 4emitter, S 8emitter and C in4the other end be connected in 11, as the negative input of circuit;
T 1and T 2secondary series connection, and T 1secondary winding T 1sthe other end and T 2secondary winding T 2ssame Name of Ends be connected in 12;
T 1secondary winding T 1ssame Name of Ends, D o1anode and D o2negative electrode connect with 13;
T 2secondary winding T 2sthe other end, D o3anode and D o4negative electrode connect with 14;
D o1negative electrode, D o3negative electrode and L outone end be connected in 15;
L outthe other end, C outone end be connected in 16, as the cathode output end of circuit;
D o2anode, D o4anode and C outthe other end be connected in 17, as the cathode output end of circuit.
Apply a Switching Power Supply for DC converter of the present invention, its special character is:
Comprise diode rectifier circuit, inductance L in, the wide loading range ZVS of doube bridge three-level DC converter;
The wide loading range ZVS of described doube bridge three-level DC converter comprises 8 self-turn-off device S 1～S 8, 2 capacitance C bL1, C bL2, 4 capacitor C in1～C in4, 2 high frequency transformer T 1, T 2, 1 inductance L 1and output rectification filter unit; Described output rectification filter unit comprises 4 diode D o1～D o4, inductance L out, capacitor C out;
Wherein:
The interchange side joint three-phase alternating-current supply of diode rectifier circuit;
DC side positive pole and the inductance L of diode rectifier circuit inone end connect;
Inductance L inthe other end, S 1collector electrode, S 5collector electrode and C in1one end be connected in 1;
C bL2one end and T 2former limit winding T 2psame Name of Ends be connected in 2;
S 5emitter, S 6collector electrode and C bL2the other end be connected in 3;
C in1the other end, C in2one end and L 1one end be connected in 4;
S 1emitter, S 2collector electrode, L 1the other end and C bL1one end be connected in 5;
C bL1the other end and T 1former limit winding T 1psame Name of Ends be connected in 6;
S 2emitter, S 3collector electrode, S 6emitter, S 7collector electrode, C in2the other end and C in3one end be connected in 7;
S 7emitter, S 8collector electrode, T 2former limit winding T 2pthe other end and L 2one end be connected in 8;
C in3the other end, C in4one end and L 2the other end be connected in 9;
S 3emitter, S 4collector electrode and transformer T 1former limit winding T 1pthe other end be connected in 10;
The DC side negative pole of diode rectifier circuit, S 4emitter, S 8emitter and C in4the other end be connected in 11;
T 1and T 2secondary series connection, and T 1secondary winding T 1sthe other end and T 2secondary winding T 2ssame Name of Ends be connected in 12;
T 1secondary winding T 1ssame Name of Ends, D o1anode and D o2negative electrode connect with 13;
T 2secondary winding T 2sthe other end, D o3anode and D o4negative electrode connect with 14;
D o1negative electrode, D o3negative electrode and L outone end be connected in 15;
L outthe other end, C outone end be connected in 16, as the cathode output end of circuit;
D o2anode, D o4anode and C outthe other end be connected in 17, as the cathode output end of circuit.
Advantage of the present invention:
1, simple in structure, transformer primary side does not need extra clamps;
2, to bear voltage stress low for device, and each switching device bears U in/ 2 voltage stress, is applicable to high voltage direct current conversion;
3, control simply, adopt ripe phase-shift control mode, there is very strong practicality;
4, output waveform is three level, can greatly reduce the harmonic content in output waveform, under identical filter conditions, can greatly reduce switching frequency, improves circuit efficiency.
5, by adding two resonant inductances, expand the soft-switching range of former limit self-turn-off device, can greatly reduce the switching loss of self-turn-off device, this circuit can be widely used in direct-current switch power supply field.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of DC converter of the present invention.
Fig. 2 is that DC converter of the present invention is at U inconducting schematic diagram under/k pattern.
Fig. 3 is that DC converter of the present invention is at U inconducting schematic diagram under/2k pattern.
Fig. 4 is DC converter of the present invention at-U inconducting schematic diagram under/k pattern.
Fig. 5 is DC converter of the present invention at-U inconducting schematic diagram under/2k pattern.
Fig. 6 is DC converter transformer secondary output waveform principle schematic of the present invention.
Fig. 7 is the circuit structure diagram of Switching Power Supply of the present invention.
Embodiment
The wide loading range ZVS of doube bridge three-level DC converter transformer primary side circuit feature is:
S 1collector electrode, S 5collector electrode and C in1one end be connected in 1; C bL2one end and T 2former limit winding T 2psame Name of Ends be connected in 2; S 5emitter, S 6collector electrode and C bL2the other end be connected in 3; C in1the other end, C in2one end and L 1one end be connected in 4; S 1emitter, S 2collector electrode, L 1the other end and C bL1one end be connected in 5; C bL1the other end and T 1former limit winding T 1psame Name of Ends be connected in 6; S 2emitter, S 3collector electrode, S 6emitter, S 7collector electrode, C in2the other end and C in3one end be connected in 7; S 7emitter, S 8collector electrode, T 2former limit winding T 2pthe other end and L 2one end be connected in 8; C in3the other end, C in4one end and L 2the other end be connected in 9; S 3emitter, S 4collector electrode and transformer T 1former limit winding T 1pthe other end be connected in 10; S 4emitter, S 8emitter and C in4one end be connected in 11.
The wide loading range ZVS of doube bridge three-level DC converter transformer secondary feature is:
T 1and T 2secondary series connection.T 1secondary winding T 1sthe other end and T 2same Name of Ends is connected in 12; T 1secondary winding T 1sa Same Name of Ends and D o1anode and D o2negative electrode connect with 13; T 2secondary winding T 2sthe other end and D o3anode and D o4negative electrode connect with 14; D o1and D o3negative electrode and L outone end be connected in 15; L outthe other end, C outone end be connected in 16; D o2anode, D o4anode and C outthe other end be connected in 17.
Embodiment 1
This example is the Switching Power Supply that adopts the wide loading range ZVS of doube bridge three-level DC converter.
Referring to Fig. 7, three-phase alternating-current supply is through diode rectifier circuit D in1-D in6become direct current, DC side is anodal through inductance L inconnect with 1 end of described circuit; The negative pole of DC side is connected with 11 ends of described circuit; In figure, transformer is high frequency transformer.
Through controlling C bL1and C bL2the controlled U that is made as of both end voltage in/ 2, its groundwork state is summarized as follows:
Referring to Fig. 2, switch S 1, S 4, S 5, S 8conducting, transformer T 1the voltage that bear at winding two ends, former limit is U in/ 2; Transformer T 2the voltage that bear at winding two ends, former limit is U in/ 2, converter transformer secondary series connection output U in/ k level.
Referring to Fig. 3, switch S 1, S 5, S 8, D 3conducting, transformer T 1the voltage that bear at winding two ends, former limit is 0; Transformer T 2the voltage that bear at winding two ends, former limit is U in/ 2, converter transformer secondary series connection output U in/ 2k level.
Referring to Fig. 4, switch S 2, S 3, S 6, S 7conducting, transformer T 1the voltage that bear at winding two ends, former limit is-U in/ 2; Transformer T 2the voltage that bear at winding two ends, former limit is-U in/ 2, converter transformer secondary series connection output-U in/ k level.
Referring to Fig. 5, switch S 2, S 6, S 7, D 4conducting, transformer T 1the voltage that bear at winding two ends, former limit is 0; Transformer T 2the voltage that bear at winding two ends, former limit is-U in/ 2, converter transformer secondary series connection output-U in/ 2k level.
Referring to Fig. 6, it is converter transformer secondary output waveform.

Claims (2)

1. the wide loading range ZVS of a doube bridge three-level DC converter, is characterized in that:
Comprise 8 self-turn-off device S 1～S 8, 2 capacitance C bL1, C bL2, 4 capacitor C in1～C in4, 2 high frequency transformer T 1, T 2, 1 inductance L 1and output rectification filter unit; Described output rectification filter unit comprises 4 diode D o1～D o4, inductance L out, capacitor C out;
Wherein:
S 1collector electrode, S 5collector electrode and C in1one end be connected in 1, as the electrode input end of circuit;
C bL2one end and T 2former limit winding T 2psame Name of Ends be connected in 2;
S 5emitter, S 6collector electrode and C bL2the other end be connected in 3;
C in1the other end, C in2one end and L 1one end be connected in 4;
S 1emitter, S 2collector electrode, L 1the other end and C bL1one end be connected in 5;
C bL1the other end and T 1former limit winding T 1psame Name of Ends be connected in 6;
S 2emitter, S 3collector electrode, S 6emitter, S 7collector electrode, C in2the other end and C in3one end be connected in 7;
S 7emitter, S 8collector electrode, T 2former limit winding T 2pthe other end and L 2one end be connected in 8;
C in3the other end, C in4one end and L 2the other end be connected in 9;
S 3emitter, S 4collector electrode and transformer T 1former limit winding T 1pthe other end be connected in 10;
S 4emitter, S 8emitter and C in4the other end be connected in 11, as the negative input of circuit;
T 1and T 2secondary series connection, and T 1secondary winding T 1sthe other end and T 2secondary winding T 2ssame Name of Ends be connected in 12;
T 1secondary winding T 1ssame Name of Ends, D o1anode and D o2negative electrode connect with 13;
T 2secondary winding T 2sthe other end, D o3anode and D o4negative electrode connect with 14;
D o1negative electrode, D o3negative electrode and L outone end be connected in 15;
L outthe other end, C outone end be connected in 16, as the cathode output end of circuit;
D o2anode, D o4anode and C outthe other end be connected in 17, as the cathode output end of circuit.
2. a Switching Power Supply, is characterized in that:
Comprise diode rectifier circuit, inductance L in, the wide loading range ZVS of doube bridge three-level DC converter;
The wide loading range ZVS of described doube bridge three-level DC converter comprises 8 self-turn-off device S 1～S 8, 2 capacitance C bL1, C bL2, 4 capacitor C in1～C in4, 2 high frequency transformer T 1, T 2, 1 inductance L 1and output rectification filter unit; Described output rectification filter unit comprises 4 diode D o1～D o4, inductance L out, capacitor C out;
Wherein:
The interchange side joint three-phase alternating-current supply of diode rectifier circuit;
DC side positive pole and the inductance L of diode rectifier circuit inone end connect;
Inductance L inthe other end, S 1collector electrode, S 5collector electrode and C in1one end be connected in 1;
C bL2one end and T 2former limit winding T 2psame Name of Ends be connected in 2;
S 5emitter, S 6collector electrode and C bL2the other end be connected in 3;
C in1the other end, C in2one end and L 1one end be connected in 4;
S 1emitter, S 2collector electrode, L 1the other end and C bL1one end be connected in 5;
C bL1the other end and T 1former limit winding T 1psame Name of Ends be connected in 6;
S 2emitter, S 3collector electrode, S 6emitter, S 7collector electrode, C in2the other end and C in3one end be connected in 7;
S 7emitter, S 8collector electrode, T 2former limit winding T 2pthe other end and L 2one end be connected in 8;
C in3the other end, C in4one end and L 2the other end be connected in 9;
S 3emitter, S 4collector electrode and transformer T 1former limit winding T 1pthe other end be connected in 10;
The DC side negative pole of diode rectifier circuit, S 4emitter, S 8emitter and C in4the other end be connected in 11;
T 1and T 2secondary series connection, and T 1secondary winding T 1sthe other end and T 2secondary winding T 2ssame Name of Ends be connected in 12;
T 1secondary winding T 1ssame Name of Ends, D o1anode and D o2negative electrode connect with 13;
T 2secondary winding T 2sthe other end, D o3anode and D o4negative electrode connect with 14;
D o1negative electrode, D o3negative electrode and L outone end be connected in 15;
L outthe other end, C outone end be connected in 16, as the cathode output end of circuit;
D o2anode, D o4anode and C outthe other end be connected in 17, as the cathode output end of circuit.
CN201310746203.0A 2013-12-30 2013-12-30 Three-level direct current converter of ZVS (zero voltage switch) with dual-bridge wide load range and switch power supply Pending CN103746563A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108919016A (en) * 2018-09-13 2018-11-30 广东电网有限责任公司 A kind of voltage dip generator and voltage dip pilot system
CN113437879A (en) * 2021-07-13 2021-09-24 湖南大学 Direct current converter and control method thereof
US11404966B2 (en) 2020-07-02 2022-08-02 Delta Electronics, Inc. Isolated multi-phase DC/DC converter with reduced quantity of blocking capacitors

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353547B1 (en) * 2000-08-31 2002-03-05 Delta Electronics, Inc. Three-level soft-switched converters
CN101860217A (en) * 2010-06-11 2010-10-13 哈尔滨工业大学 ZVS full-bridge three-level converter with bilateral buffer network
CN102237799A (en) * 2011-07-12 2011-11-09 珠海泰坦新能源系统有限公司 Three-level resonant converter clamped by resonant capacitor and transformer primary side
CN102684504A (en) * 2012-05-28 2012-09-19 西安爱科赛博电气股份有限公司 Three-level direct current-direct current (dc-dc) converter
CN102710138A (en) * 2012-05-28 2012-10-03 西安爱科赛博电气股份有限公司 Harmonic direct current converter with wide range and low ZVS (zero-voltage-switching) output

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6353547B1 (en) * 2000-08-31 2002-03-05 Delta Electronics, Inc. Three-level soft-switched converters
CN101860217A (en) * 2010-06-11 2010-10-13 哈尔滨工业大学 ZVS full-bridge three-level converter with bilateral buffer network
CN102237799A (en) * 2011-07-12 2011-11-09 珠海泰坦新能源系统有限公司 Three-level resonant converter clamped by resonant capacitor and transformer primary side
CN102684504A (en) * 2012-05-28 2012-09-19 西安爱科赛博电气股份有限公司 Three-level direct current-direct current (dc-dc) converter
CN102710138A (en) * 2012-05-28 2012-10-03 西安爱科赛博电气股份有限公司 Harmonic direct current converter with wide range and low ZVS (zero-voltage-switching) output

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108919016A (en) * 2018-09-13 2018-11-30 广东电网有限责任公司 A kind of voltage dip generator and voltage dip pilot system
US11404966B2 (en) 2020-07-02 2022-08-02 Delta Electronics, Inc. Isolated multi-phase DC/DC converter with reduced quantity of blocking capacitors
CN113437879A (en) * 2021-07-13 2021-09-24 湖南大学 Direct current converter and control method thereof
CN113437879B (en) * 2021-07-13 2022-08-09 湖南大学 Direct current converter and control method thereof

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Application publication date: 20140423