CN204497990U - ITVDC converter unit and high pressure Sofe Switch DC power supply - Google Patents

ITVDC converter unit and high pressure Sofe Switch DC power supply Download PDF

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Publication number
CN204497990U
CN204497990U CN201420753257.XU CN201420753257U CN204497990U CN 204497990 U CN204497990 U CN 204497990U CN 201420753257 U CN201420753257 U CN 201420753257U CN 204497990 U CN204497990 U CN 204497990U
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transformer
converter unit
circuit
power supply
itvdc
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石勇
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BEIJING LANJUN ELECTRICAL EQUIPMENT 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 utility model relates to a kind of ITVDC converter unit and high pressure Sofe Switch DC power supply, wherein ITVDC converter unit comprises equalizer circuit, multiple self-turn-off device, transformer group and rectification filtering unit, equalizer circuit comprises four input capacitances of connecting successively be connected between power positive cathode, multiple self-turn-off device is divided into the first switches set and second switch group, and the first switches set comprises the S connected successively 1, S 2, S 3, S 4, second switch group comprises the S connected successively 5, S 6, S 7, S 8.The all switching devices of the utility model transformer primary side only bear U inthe voltage stress of/2; Structure is simple, and former limit switching device does not need voltage balancer part; Efficiency is high, and in leading-bridge full-load range, no-voltage is open-minded, lagging leg gamut zero-current switching; This circuit can be widely used in high input voltage DC power supply field.

Description

ITVDC converter unit and high pressure Sofe Switch DC power supply
Technical field
The utility model relates to a kind of novel high-pressure Sofe Switch DC power supply, and this power supply can be used for high pressure field.
Background technology
Multilevel converter is the hot technology of power electronic technology.In applied power electronics, be subject to the impact of device voltage quota, the inevitable version adopting devices in series in circuit, in order to static state, the dynamic voltage balancing problem solving devices in series must add 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, obtains better output characteristic by the combination of mode of operation.1992, Brazilian scholar proposed a kind of diode clamp three-level DC converter, and this circuit as shown in Figure 1.In Fig. 1 circuit, 4 self-turn-off devices are connected in series, by dc-link capacitance C in1, C in2with clamp diode D cl1, D cl2the voltage stress of balanced self-turn-off device, thus make the voltage stress of each self-turn-off device be the half of input voltage, this circuit can be widely used in high voltage direct current conversion field.
But the following weak point of this circuit: adopt fast recovery diode all to press, former limit equalizer circuit structure is simple; Fast recovery diode has reverse reverting problem to be difficult to ensure all to press effect; Lagging leg Sofe Switch difficulty; Self-turn-off device current stress is large, is 2 times of full-bridge circuit, is not suitable for high-power conversion.
Utility model content
In order to solve the problem, the utility model proposes a kind of novel high-pressure Sofe Switch DC power supply, effectively can simplify equalizer circuit structure, expand self-turn-off device soft-switching range and reduce self-turn-off device voltage stress.
To achieve these goals, the utility model adopts following technical scheme:
A kind of ITVDC converter unit, comprise equalizer circuit, multiple self-turn-off device, transformer group and rectification filtering unit, its special character is:
Described equalizer circuit comprises four the input capacitance C connected successively be connected between power positive cathode in1, C in2, C in3, C in4,
Described multiple self-turn-off device is divided into the first switches set and second switch group, and the first switches set comprises the S connected successively 1, S 2, S 3, S 4, second switch group comprises the S connected successively 5, S 6, S 7, S 8, wherein S 1, S 5collector electrode be connected with the positive pole of power supply, S 4, S 8emitter be connected with the negative pole of power supply, S 3, S 4, S 5, S 6emitter and collector electrode between equal inverse parallel diodes,
Described C in1with C in2tie point, S 5with S 6tie point between be electrically connected, described C in2with C in3tie point, S 2with S 3tie point and S 6, S 7tie point between be electrically connected, described C in3with C in4tie point, S 3with S 4tie point between be electrically connected,
Described transformer group comprises transformer T 1and transformer T 2, described transformer T 1the Same Name of Ends of former limit winding be connected to S 3with S 4between, described transformer T 1the different name end of former limit winding by capacitance C bL2be connected to S 1with S 2between; Described transformer T 2the Same Name of Ends of former limit winding by capacitance C bL1be connected to S 5with S 6between, described transformer T 2the different name end of former limit winding be connected to S 7with S 8between,
Described transformer T 1and transformer T 2vice-side winding export direct current by rectification filtering unit.
Above-mentioned ITVDC converter unit also comprises inductance L 1and inductance L 2, described L 1one end be connected to S 5with S 6between, the other end is connected to C in1with C in2between, described L 2one end be connected to S 3with S 4between, the other end is connected to C in3with C in4between.
Above-mentioned ITVDC converter unit also comprises four diode D 1, D 2, D 7, D 8, described D 1be connected to positive source and S 1emitter between and D 1anode be connected with positive source; Described D 2be connected to S 1with S 2between and D 2anode and S 1emitter connect; Described D 7be connected to S 6with S 7between and D 7anode and S 6collector electrode connect; Described D 8be connected to S 7with S 8between and D 8anode and S 7emitter connect.
Above-mentioned rectification filtering unit comprises diode half-bridge rectification circuit and LC filter circuit, described T 1and T 2vice-side winding all successively by diode half-bridge rectification circuit and the whole output direct current of LC filter circuit.
A kind of high pressure Sofe Switch DC power supply, it is characterized in that: comprise three-phase alternating-current supply, diode rectifier circuit and ITVDC converter unit, described three-phase alternating-current supply is connected with ITVDC converter unit by diode rectifier circuit, and the structure of described ITVDC converter unit is described above.
Above-mentioned diode rectifier circuit is three-phase bridge diode uncontrollable rectifier unit.
Compared with prior art, advantage is the utility model:
1) all switching devices of transformer primary side only bear U inthe voltage stress of/2; 2) structure is simple, and former limit switching device does not need voltage balancer part; 3) efficiency is high, and in leading-bridge full-load range, no-voltage is open-minded, lagging leg gamut zero-current switching; 4) control simply, can use phase-shifting full-bridge control mode, with low cost being easy to realizes.This circuit can be widely used in high input voltage DC power supply field.
Accompanying drawing explanation
Fig. 1 Brazil scholar proposes diode clamp tri-level circuit.
Fig. 2 novel three level DC ITVDC converter unit circuit topology.
Fig. 3 novel high-pressure Sofe Switch DC power supply structure chart.
The typical waveform of Fig. 4 novel three level DC ITVDC converter unit circuit.
Fig. 5 is that in embodiment, transformer secondary is operated in U in/ k tconducting schematic diagram under pattern.
Fig. 6 is that in embodiment, transformer secondary is operated in conducting schematic diagram under 0 pattern.
Fig. 7 is that in embodiment, transformer secondary is operated in-U in/ k tconducting schematic diagram under pattern.
Fig. 8 is that in embodiment, transformer secondary is operated in conducting schematic diagram under 0 pattern.
Embodiment
Structure of the present utility model and operation principle is described in detail below according to embodiment.
This example is the Switching Power Supply main circuit topology adopting pole low output voltage ripple diode clamp three-level DC converter.As shown in Figure 3, it is made up of diode uncontrollable rectifier unit and a novel three level DC ITVDC converter unit.As shown in Figure 2, its former limit circuit feature is three level DC ITVDC converter unit: direct current input positive pole and S 1collector electrode, D 1anode and C in1one end be connected to 1; C in1the other end and C in2one end and L 1one end be connected to 2; S 2emitter and S 3collector electrode, S 6emitter, D 7anode, C in2the other end and C in3one end be connected to 3; C in3the other end and C in4one end and L 2one end be connected to 4; Direct current input negative pole and C in4the other end, S 4emitter and S 8emitter be connected to 5; C bL1one end and S 5emitter, S 6collector electrode and L 1the other end be connected to 6; C bL1the other end and transformer T 2former limit winding T 2psame Name of Ends be connected to 7; Transformer T 2former limit winding T 2pnon-same polarity and D 8anode and S 7emitter be connected to 8; C bL2one end and S 1emitter, D 2anode be connected to 9; Transformer T 1former limit winding T 1psame Name of Ends and S 3emitter, S 4collector electrode and L 2one end be connected to 10; C bL2the other end and transformer T 1former limit winding T 1pnon-same polarity be connected to 11; D 1negative electrode and S 1collector electrode be connected to 12; D 2negative electrode and S 2collector electrode be connected to 13; D 7negative electrode and S 7collector electrode be connected to 14; D 8negative electrode and S 8collector electrode be connected to 15.
Its transformer secondary circuit feature is: T 1vice-side winding T 1s1same Name of Ends and D o1anode be connected to 16; D o1and D o2negative electrode and L oone end be connected to 17; L othe other end and C oone end, L o1one end and direct current output cathode be connected to 18; T 1vice-side winding T 1s1non-same polarity, T 1vice-side winding T 1s2same Name of Ends, T 2vice-side winding T 2s1non-same polarity, T 2vice-side winding T 2s2same Name of Ends, C othe other end and direct current output negative pole be connected to 19; T 1vice-side winding T 1s2non-same polarity and D o2anode connect with 20; T 2vice-side winding T 2s1same Name of Ends and D o3anode be connected to 21; T 2vice-side winding T 2s2non-same polarity and D o4anode connect with 22; D o3and D o4negative electrode and L o1the other end be connected to 23.
Circuit control mode as shown in Figure 4, adopts conventional phase-shifting full-bridge control mode, passes through L 1and L 2energy storage, expand S 5, S 6, S 3and S 4no-voltage open loading range; Pass through C bL1, C bL2, D 1, D 2, D 7and D 8reset primary current, ensures S 1, S 2, S 7and S 8zero-current switching loading range.
See Fig. 3, three-phase alternating-current supply is through diode rectifier circuit D in1-D in6become direct current, DC side positive pole is through inductance L inbe connected with 1 end of described circuit; The negative pole of DC side is connected with 5 ends of described circuit.C during circuit working bL1, C bL2both end voltage is controlled is made as U in/ 2, its prevailing operating state is summarized as follows:
See Fig. 5, switch S 2, S 3, S 5, S 8, D 2, D 8conducting.Transformer T 1former limit winding T 1pthe voltage that two ends are born is U in/ 2, transformer T 2former limit winding T 2pthe voltage that two ends are born is U in/ 2.Transformer secondary winding exports as U in/ k tlevel.
See Fig. 6, switch S 2, D 4, D 6, S 8, D 2, D 8conducting.Transformer T 1former limit winding T 1pthe voltage that two ends are born is 0, transformer T 2former limit winding T 2pthe voltage 0 that two ends are born.Now, S 4and S 6no-voltage can be realized open-minded.C bL1, C bL2, D 2and D 8reset primary current, ensures S 2and S 8zero-current switching.The afterflow of transformer secondary winding.
See Fig. 7, switch S 1, S 4, S 6, S 7, D 1, D 7conducting.Transformer T 1former limit winding T 1pthe voltage that two ends are born is-U in/ 2, transformer T 2former limit winding T 2pthe voltage that two ends are born is-U in/ 2.Transformer secondary winding exports as-U in/ k tlevel.
See Fig. 6, switch S 1, D 3, D 5, S 7, D 1, D 7conducting.Transformer T 1former limit winding T 1pthe voltage that two ends are born is 0, transformer T 2former limit winding T 2pthe voltage 0 that two ends are born.Now, S 3and S 5no-voltage can be realized open-minded.C bL1, C bL2, D 1and D 7reset primary current, ensures S 1and S 7zero-current switching.The afterflow of transformer secondary winding.
See Fig. 4, it is the typical waveform of this circuit.

Claims (6)

1. an ITVDC converter unit, comprises equalizer circuit, multiple self-turn-off device, transformer group and rectification filtering unit, it is characterized in that:
Described equalizer circuit comprises four the input capacitance C connected successively be connected between power positive cathode in1, C in2, C in3, C in4,
Described multiple self-turn-off device is divided into the first switches set and second switch group, and the first switches set comprises the S connected successively 1, S 2, S 3, S 4, second switch group comprises the S connected successively 5, S 6, S 7, S 8, wherein S 1, S 5collector electrode be connected with the positive pole of power supply, S 4, S 8emitter be connected with the negative pole of power supply, S 3, S 4, S 5, S 6emitter and collector electrode between equal inverse parallel diodes,
Described C in1with C in2tie point, S 5with S 6tie point between be electrically connected, described C in2with C in3tie point, S 2with S 3tie point and S 6, S 7tie point between be electrically connected, described C in3with C in4tie point, S 3with S 4tie point between be electrically connected,
Described transformer group comprises transformer T 1and transformer T 2, described transformer T 1the Same Name of Ends of former limit winding be connected to S 3with S 4between, described transformer T 1the different name end of former limit winding by capacitance C bL2be connected to S 1with S 2between; Described transformer T 2the Same Name of Ends of former limit winding by capacitance C bL1be connected to S 5with S 6between, described transformer T 2the different name end of former limit winding be connected to S 7with S 8between,
Described transformer T 1and transformer T 2vice-side winding export direct current by rectification filtering unit.
2. ITVDC converter unit according to claim 1, is characterized in that: described ITVDC converter unit also comprises inductance L 1and inductance L 2, described L 1one end be connected to S 5with S 6between, the other end is connected to C in1with C in2between, described L 2one end be connected to S 3with S 4between, the other end is connected to C in3with C in4between.
3. ITVDC converter unit according to claim 2, is characterized in that: described ITVDC converter unit also comprises four diode D 1, D 2, D 7, D 8, described D 1be connected to positive source and S 1emitter between and D 1anode be connected with positive source; Described D 2be connected to S 1with S 2between and D 2anode and S 1emitter connect; Described D 7be connected to S 6with S 7between and D 7anode and S 6collector electrode connect; Described D 8be connected to S 7with S 8between and D 8anode and S 7emitter connect.
4. the ITVDC converter unit according to claim 1 or 2 or 3, is characterized in that: described rectification filtering unit comprises diode half-bridge rectification circuit and LC filter circuit, described T 1and T 2vice-side winding all successively by diode half-bridge rectification circuit and the whole output direct current of LC filter circuit.
5. a high pressure Sofe Switch DC power supply, it is characterized in that: comprise three-phase alternating-current supply, diode rectifier circuit and ITVDC converter unit, described three-phase alternating-current supply is connected with ITVDC converter unit by diode rectifier circuit, and the structure of described ITVDC converter unit is as described in one of claim 1-4.
6. high pressure Sofe Switch DC power supply according to claim 5, is characterized in that: described diode rectifier circuit is three-phase bridge diode uncontrollable rectifier unit.
CN201420753257.XU 2014-11-29 2014-11-29 ITVDC converter unit and high pressure Sofe Switch DC power supply Active CN204497990U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109194147A (en) * 2018-09-18 2019-01-11 陕西科技大学 A kind of intelligent micro-grid electric power electric transformer with redundancy feature
CN109391161A (en) * 2017-08-10 2019-02-26 台达电子企业管理（上海）有限公司 Technics of Power Electronic Conversion unit and system
CN113965089A (en) * 2021-09-30 2022-01-21 浙江工业大学之江学院 Energy internet interface circuit with serially connected output capacitors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109391161A (en) * 2017-08-10 2019-02-26 台达电子企业管理（上海）有限公司 Technics of Power Electronic Conversion unit and system
CN109194147A (en) * 2018-09-18 2019-01-11 陕西科技大学 A kind of intelligent micro-grid electric power electric transformer with redundancy feature
CN109194147B (en) * 2018-09-18 2020-11-24 陕西科技大学 Power electronic transformer with redundancy function for intelligent micro-grid
CN113965089A (en) * 2021-09-30 2022-01-21 浙江工业大学之江学院 Energy internet interface circuit with serially connected output capacitors
CN113965089B (en) * 2021-09-30 2023-08-15 苏州阳菱智能科技有限公司 Energy internet interface circuit with serially connected output capacitors

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C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20200428

Address after: 101149 Xiaobao village, Songzhuang Town, Tongzhou District, Beijing

Patentee after: BEIJING LANJUN ELECTRICAL EQUIPMENT Co.,Ltd.

Address before: 710119, No. 12, information Avenue, new industrial park, hi tech Zone, Shaanxi, Xi'an

Patentee before: XI'AN ACTIONPOWER ELECTRIC Co.,Ltd.

TR01 Transfer of patent right