CN102291020A - Alternating-current push-pull conversion-single-diode rectification AC-DC (alternating current-to-direct current) converter - Google Patents

Alternating-current push-pull conversion-single-diode rectification AC-DC (alternating current-to-direct current) converter Download PDF

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Publication number
CN102291020A
CN102291020A CN2011102069169A CN201110206916A CN102291020A CN 102291020 A CN102291020 A CN 102291020A CN 2011102069169 A CN2011102069169 A CN 2011102069169A CN 201110206916 A CN201110206916 A CN 201110206916A CN 102291020 A CN102291020 A CN 102291020A
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converter
voltage
output
conversion
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CN2011102069169A
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马红星
李华武
蒋婷
杨喜军
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Abstract

The invention discloses an alternating-current push-pull conversion-single-diode rectification AC-DC converter in the technical field of power electronic conversion. The AC-DC converter comprises a step-down circuit and a rectification circuit which are sequentially connected in series, the step-down circuit converts high-voltage power-frequency alternating-current voltage into high-voltage high-frequency pulse alternating-current voltage by means of a push-pull converter, the high-voltage high-frequency pulse alternating-current voltage is decreased into low-voltage high-frequency pulse alternating-current voltage by a step-down transformer, the obtained low-voltage high-frequency pulse alternating-current voltage is then restored into low-voltage doubled-power frequency alternating-current voltage by an output filter capacitor and a single-phase rectifier, stable direct-current output voltage and linear input impedance are then obtained by means of a booster circuit, and thereby the content of harmonic waves is greatly reduced. The AC-DC converter utilizes the step-down circuit and the rectification circuit to convert the high-voltage alternating-current voltage into the low-voltage direct-current voltage, has a high unit input power factor, and has the advantages of simple overall structure and more complete overall performance.

Description

The AC-DC converter of conversion-single tube rectification is recommended in interchange
Technical field
What the present invention relates to is a kind of device of Technics of Power Electronic Conversion technical field, specifically is the AC-DC converter that conversion-single tube rectification is recommended in a kind of interchange.
Background technology
Electric power electric transformer mainly is made up of converters, high frequency transformer and controller etc.Comprising: the converters of high frequency device for high-power power electronic such as IGBT or IGCT is the core of electric power electric transformer, and its function is to finish the frequency of electric energy, amplitude conversion; The function of high frequency transformer is to isolate and transformation; The function of controller be realize transformation of electrical energy, voltage is stable and the control of the quality of power supply.
Find through retrieval prior art, Chinese patent application number 02139030.4, open day: 2003.03.12. put down in writing a kind of " electric power electric transformer ", this technology electric power electric transformer is based on three-phase-three-phase matrix converter structure, intermediate link is very complicated, realize that difficulty is very high, economy is lower, is difficult to realize and apply.
Further retrieval is found, Chinese patent application numbers 200910025824.3, open day: 2009.11.04. put down in writing a kind of " multifunctional power electric transformer ", the electric power electric transformer of this technology is multiple functional, but structure is very complicated, the control difficulty is very high, and feasibility is lower, is difficult to realize and obtain extensive use.
WANG JUN etc., " intelligent grid technology ". IEEE Trans. on Industry Electronics Magzine(industrial electronic magazine) .2009 in June put down in writing a kind of " based on the electric power electric transformer technology of traditional thought ", this technology has stronger function, but high-pressure side has 2 stage converter, structure is very complicated, the control difficulty is very high, and feasibility is lower.
Electric power electric transformer mainly is made of the primary and secondary power inverter and the high frequency transformer of getting in touch between the two.From the input-output characteristic of electric power electric transformer, be equivalent to the AC/AC conversion.Its basic functional principle is coupled to secondary for the power-frequency voltage of input is modulated to high-frequency ac voltage through former limit converter by high frequency transformer, and the power inverter by secondary is converted into desired voltage again.Electric power electric transformer has that volume is little, power factor is high, be convenient to advantage such as monitoring automatically.
Traditionally, electric power electric transformer finally need produce alternating voltage output, but link must include DC link in the middle of it.In addition, development along with the intelligent grid technology, the application scenario that a kind of high-voltage alternating input-voltage direct current output in the distribution field, certainly will will occur, directly High AC voltage is incorporated into community, can further realize saving energy and reduce the cost, and direct current output can comprise various frequency-conversion domestic electric appliances and vehicle charging equipment for various contravariant equipments power supplies as bus, also can be used as common interface and inserts various novel energies.The electric power electric transformer of direct current output still is in conceptual phase as one type of the conventional electric power electronic transformer, needs the release of better circuit topology, modulation algorithm and control theory.
Summary of the invention
The present invention is directed to the concrete condition of prior art above shortcomings and direct current output power electronic transformer, provide a kind of interchange to recommend the AC-DC converter of conversion-single tube rectification, be modulated to high-frequency signal by importing industrial frequency AC in the net side, after high frequency transformer is coupled to secondary side, carry out the decompression AC-DC conversion at secondary side, be reduced into two times of power frequency half-wave alternating voltages by the single-phase rectifier frequency reducing, provide galvanic current to press output and net side unit input power factor through booster circuit again, suppress the side harmonics electric current.
The present invention is achieved by the following technical solutions, the present invention includes: Chuan Lian reduction voltage circuit and rectification circuit successively, wherein: reduction voltage circuit converts the high pressure power frequency ac voltage to high voltagehigh frequency pulse ac voltage by push-pull converter, and obtain low pressure high frequency pulse AC voltage by the step-down transformer step-down, by an output filter capacitor and single-phase rectifier the low pressure high frequency pulse AC voltage that obtains is reduced to two times of power frequency ac voltages of low pressure again, obtain stable VD and linear input impedance through booster circuit again, reflex to the high-voltage alternating electrical network, obtain impedance of net side line and net side unit input power factor, harmonic content significantly reduces.
Described reduction voltage circuit comprises that successively the input filter that links to each other, AC chopping are with push-pull converter, the high frequency transformer that is used for step-down and output filter.
The described input filter that is used for reduction voltage circuit is made up of a LC filter, Input links to each other with AC power, and output links to each other with two inputs of AC chopping with push-pull converter.
DescribedThe AC chopping that is used for reduction voltage circuit is used The structure of push-pull converter is the mapped structure of recommending of two bidirectional switchs compositions,Each bidirectional switch is by two differential concatenations The contrary type switch of leading is formed, and is basic switch against leading the type switch, is made of an IGBT pipe and a diode reverse parallel connection.First, second bidirectional switch parallel connection, its lower end all links to each other with the output negative pole of input filter, and the upper end of first bidirectional switch is connected with the first input end of high frequency transformer, and the upper end of second bidirectional switch links to each other with second input of high frequency transformer.AC chopping can adopt the pulse control signal of 50% duty ratio with push-pull converter, also can adopt the pulse control signal based on other modulation algorithm and control principle, obtains the positive and negative high-frequency pulse voltage that replaces.
The described high frequency transformer that is used for reduction voltage circuit Elementary winding with two series aiding connections, its centre cap links to each other with the output cathode of input filter, and two ends link to each other with the upper end of first, second bidirectional switch respectively,The output of high frequency transformer links to each other with output filter.
The described output filter that is used for reduction voltage circuit is an output filter capacitor, and cross-over connection is in the output of high frequency transformer, And link to each other with two inputs of single-phase rectifier.
Described rectification circuit comprises the single-phase rectifier and the booster circuit that link to each other successively.
The described rectification circuit of being used forSingle-phase rectifier Be diode rectifier bridge, the mid point of two brachium pontis links to each other with output filter, and output links to each other with two inputs of booster circuit respectively.
The described booster circuit that is used for rectification circuit comprises: second inductance, the 5th contrary switch, diode, the filter capacitor of leading, wherein: the filter capacitor cross-over connection is in the output of booster circuit, one end of second inductance links to each other with the output cathode of single-phase rectifier, the other end of second inductance contrary is led the collector electrode of switch and the anode of diode links to each other with the 5th respectively, the 5th contrary emitter of leading switch links to each other with the output negative pole of single-phase rectifier, and the negative electrode of diode is the output head anode of booster circuit.The booster circuit that is used for rectification circuit can adopt the modulation algorithm and the control principle of all single-phase power factor correctings, comprise control algolithm that outer voltage current inner loop control method, monocycle algorithm, no input voltage detect or the like, obtain stable VD and the input impedance of net side line.
The present invention uses the electric power electric transformer based on SiC IGBT to replace traditional distribution transformer, adopts the Technics of Power Electronic Conversion technology that energy is changed and controlled, and realizes the energy two-way flow.Has simple in structure, novel, advantage such as system bulk is little, net side power-factor improvement, environment protecting are good.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention 1;
Fig. 2 is The circuit theory diagrams of the embodiment of the invention 2;
Fig. 3 is The circuit theory diagrams of the embodiment of the invention 3.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, present embodiment provides a kind of interchange to recommend the AC-DC converter of conversion-single tube rectification, comprising: reduction voltage circuit 1 and the rectification circuit 2 that is attached thereto, wherein: reduction voltage circuit 1 In convert the high pressure power frequency ac voltage to the low pressure power frequency ac voltage.In the rectification circuit 2, the low pressure power frequency ac voltage is converted to low-voltage dc voltage, obtains linear input impedance and the impedance of linear net side, guarantee good net side power factor.
Described reduction voltage circuit 1, comprise successively the input filter L1 that links to each other and C1, AC chopping with push-pull converter (among the figure shown in BS1 and the BS2), be used for the high frequency transformer T1 and the output filter C2 of step-down.
The described input filter (shown in figure L1, the C1) that is used for reduction voltage circuit 1 is made up of a LC filter, Input links to each other with AC power, and output links to each other with two inputs of AC chopping with push-pull converter (BS1 is with shown in the BS2 among the figure).
The described AC chopping that is used for reduction voltage circuit 1 is used Push-pull converter(among the figure shown in BS1 and the BS2) Structure be two bidirectional switchs form recommend mapped structure,Each bidirectional switch is by two differential concatenations The contrary type switch of leading is formed, and contrary to lead the type switch be basic switch, is made of an IGBT pipe and a diode reverse parallel connection, and bidirectional switch BS1 leads type switch S 1 and S2 constitutes by contrary, and bidirectional switch BS2 is by against leading type switch S 7 and S8 constitutes.First, second bidirectional switch BS1 is in parallel with BS2, its lower end all links to each other with the output negative pole of input filter, the upper end of the first bidirectional switch BS1 is connected with the first input end of high frequency transformer, and the upper end of the second bidirectional switch BS2 links to each other with second input of high frequency transformer.The AC chopping push-pull converter(among the figure shown in BS1 and the BS2) Can adopt the pulse control signal of 50% duty ratio, also can adopt pulse control signal, obtain the positive and negative high-frequency pulse voltage that replaces based on other modulation algorithm and control principle.
The described high frequency transformer T1 that is used for reduction voltage circuit 1 Elementary winding with two series aiding connections, its centre cap and input filter (L1 and C1 among the figureShown in ) output cathode link to each other, the positive and negative two ends of elementary winding link to each other with the upper end of BS2 with first, second bidirectional switch BS1 respectively,The output of high frequency transformer T1 links to each other with output filter C2.
The described output filter C2 that is used for reduction voltage circuit 1 is an output filter capacitor, and cross-over connection is in the output of high frequency transformer T1, And with single-phase rectifier (D1 ~ D4 among the figureShown in ) two inputs link to each other.
Described rectification circuit 2 comprises the single-phase rectifier that links to each other successively (D1 ~ D4 among the figureShown in ) and booster circuit (L2, S5, D5, E1 among the figureShown in).
The described rectification circuit 2 of being used forSingle-phase rectifier (D1 ~ D4 among the figureShown in ) be diode rectifier bridge, the mid point of two brachium pontis and output filterC2 Link to each other, output respectively with booster circuit (L2, S5, D5, E1 among the figureShown in ) two inputs link to each other.
The described booster circuit that is used for rectification circuit 2 comprises: second inductance L 2, the 5th is contraryly led switch S 5, diode D5, filter capacitor E1, and wherein: filter capacitor E1 cross-over connection is in booster circuit (L2, S5, D5, E1 among the figureShown in ) output, an end of second inductance L 2 and single-phase rectifier (D1 ~ D4 among the figureShown in ) output cathode link to each other, the other end of second inductance L 2 is contraryly led the collector electrode of switch S 5 and the anode of diode D5 links to each other with the 5th respectively, the 5th against the emitter and the single-phase rectifier (D1 ~ D4 among the figure that lead switch S 5Shown in ) output negative pole link to each other, the negative electrode of diode D5 is the output head anode of booster circuit.The booster circuit that is used for rectification circuit 2 can adopt the modulation algorithm and the control principle of all single-phase power factor correctings, comprise control algolithm that outer voltage current inner loop control method, monocycle algorithm, no input voltage detect or the like, obtain stable VD and the input impedance of net side line.
Reduction voltage circuit 1 described in the present embodiment and rectification circuit 2 have constituted electric power electric transformer, and its effect is By promoting the AC/AC conversion operating frequency of high frequency transformer T1, realize comparing the target of the conventional transformer volume reduces, weight lightens target and unit input power factor, the pollution of no harmonic current, thereby significantly reduce the size and the weight of passive device.
In this example: the single phase alternating current (A.C.) input voltage is 10kV, push-pull converter BS1, BS2, high frequency transformer T1 and single-phase rectifier D1 ~ D4, and booster circuit L2, S5, D5, E1In the AC-DC converter that constitutes, With the 10kV AC voltage conversion is direct current 400V voltage, and high frequency transformer T1 and front stage circuits need be born the 10kV electric pressure, and high frequency transformer T1 late-class circuit need bear the 400V electric pressure.
Embodiment 2
The schematic diagram of the AC-DC converter of conversion-single tube rectification is recommended in the interchange of three-phase input as shown in Figure 2,, output-parallel. Wherein eachThe AC-DC converter of conversion-single tube rectification is recommended in interchange Input link to each other these three groups respectively at any two-phase of three-phase alternating currentThe AC-DC converter of conversion-single tube rectification is recommended in interchange Output parallel connection and output dc voltage.
Present embodiment can avoid static exciter saturated, supports bigger power output.
Embodiment 3
The schematic diagram of the AC-DC converter of conversion-single tube rectification is recommended in the interchange of input series connection as shown in Figure 3,, output series connection. By three groups of same structuresThe AC-DC converter of conversion-single tube rectification is recommended in interchange Form these three groupsThe AC-DC converter of conversion-single tube rectification is recommended in interchange Input series connection, output series connection and output dc voltage.
Present embodiment can avoid static exciter saturated, realizes high voltage input and bigger power output.
After this device adopts reduction voltage circuit and rectification circuit, can be so that the net side of converters be operated under the unity power factor, the harmonic carcellation electric current is to the pollution of electrical network, make simultaneously before the rectification circuit that the reactive current content of each point is reduced to zero point on the circuit, help simplifying circuit design, reduce cost, increase efficient and improve reliability.Simultaneously because reduction voltage circuit and rectification circuit are simple in structure, the control algolithm maturation implements very easyly, is convenient to commercialization and applies.Reduction voltage circuit has been introduced and has been recommended mapped structure, can adopt AC chopping conventional algorithm or other algorithm, realize that the high pressure industrial-frequency alternating current is pressed onto the conversion of high voltagehigh frequency alternating voltage, two bidirectional switchs have only been adopted, circuit structure is simplified, power device quantity is few, and cost reduces greatly, controls also easier; Rectification circuit adopts single-phase rectifier to realize the AC-DC conversion, and obtains output of galvanic current pressure and net side unit input power factor by booster circuit, and the current on line side harmonic content is greatly reduced.This routine converters can also be generalized to the application scenario of three-phase high-voltage alternating voltage input-low-voltage direct output.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (10)

1. the AC-DC converter of conversion-single tube rectification is recommended in an interchange, the reduction voltage circuit and the rectification circuit that it is characterized in that comprising successively series connection, described reduction voltage circuit comprise that the input filter that links to each other successively, AC chopping are with push-pull converter, the high frequency transformer that is used for step-down and output filter;
Described rectification circuit comprises single-phase rectifier and the booster circuit that links to each other successively;
Wherein: reduction voltage circuit converts the high pressure power frequency ac voltage to high voltagehigh frequency pulse ac voltage by push-pull converter, and obtain low pressure high frequency pulse AC voltage by the step-down transformer step-down, by an output filter capacitor and single-phase rectifier the low pressure high frequency pulse AC voltage that obtains is reduced to two times of power frequency ac voltages of low pressure again, obtain stable VD and linear input impedance through booster circuit again, reflex to the high-voltage alternating electrical network, obtain impedance of net side line and net side unit input power factor.
2. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, described input filter is made up of a LC filter, and input links to each other with AC power, and output links to each other with two inputs of AC chopping with push-pull converter.
3. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, described AC chopping is the mapped structure of recommending of two bidirectional switchs compositions with the structure of push-pull converter, first, second bidirectional switch parallel connection, the lower end all links to each other with the output negative pole of input filter, the upper end of first bidirectional switch is connected with the first input end of high frequency transformer, and the upper end of second bidirectional switch links to each other with second input of high frequency transformer.
4. recommend the AC-DC converter of conversion-single tube rectification according to claim 1 or 3 described interchanges, it is characterized in that, described AC chopping adopts the pulse control signal of 50% duty ratio with push-pull converter, perhaps adopt pulse control signal, obtain the positive and negative high-frequency pulse voltage that replaces based on other modulation algorithm and control principle.
5. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, described high frequency transformer has the elementary winding of two series aiding connections, its centre cap links to each other with the output cathode of input filter, two ends link to each other with the contrary upper end of leading switch of first, second cascode respectively, and the output of high frequency transformer links to each other with output filter.
6. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, described output filter is an output filter capacitor, and cross-over connection is in the output of high frequency transformer, and links to each other with two inputs of single-phase rectifier.
7. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, described single-phase rectifier is a diode rectifier bridge, and the mid point of two brachium pontis links to each other with output filter, and output links to each other with two inputs of booster circuit.
8. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, described booster circuit comprises: second inductance, the 5th contrary switch of leading, diode, filter capacitor, wherein: the filter capacitor cross-over connection is in the output of booster circuit, one end of second inductance links to each other with the output cathode of single-phase rectifier, the other end of second inductance contrary is led the collector electrode of switch and the anode of diode links to each other with the 5th respectively, the 5th contrary emitter of leading switch links to each other with the output negative pole of single-phase rectifier, and the negative electrode of diode is the output head anode of booster circuit.
9. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, the AC-DC converter of conversion-single tube rectification is recommended in interchange that the AC-DC converter of recommending conversion-single tube rectification by the interchange of three groups of same structures is formed three-phase input, output-parallel, wherein each interchange input of recommending the AC-DC converter of conversion-single tube rectification links to each other these three groups output parallel connection and the output dc voltages that exchange the AC-DC converter of recommending conversion-single tube rectification respectively at any two-phase of three-phase alternating current.
10. the AC-DC converter of conversion-single tube rectification is recommended in interchange according to claim 1, it is characterized in that, recommended the AC-DC converter of conversion-single tube rectification forms the input string connection, exports the AC-DC converter that conversion-single tube rectification is recommended in the interchange of connecting by the interchange of three groups of same structures, these the three groups input series connection that exchange the reduction voltage circuit of recommending conversion-full-bridge rectification, output series connection and output dc voltage.
CN2011102069169A 2011-07-22 2011-07-22 Alternating-current push-pull conversion-single-diode rectification AC-DC (alternating current-to-direct current) converter Pending CN102291020A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105337505A (en) * 2015-11-12 2016-02-17 深圳市泰昂能源科技股份有限公司 DC/DC conversion circuit and power supply device
CN106208761A (en) * 2016-08-12 2016-12-07 上海交通大学 Isolated form three-phase AC DC changer
CN109038524A (en) * 2018-08-13 2018-12-18 西安交通大学 A kind of electric current two-way low-voltage direct distribution system active control type limiting protector and its working method
CN111277137A (en) * 2020-03-16 2020-06-12 云南电网有限责任公司电力科学研究院 DCDC converter
WO2022007667A1 (en) * 2020-07-10 2022-01-13 Oppo广东移动通信有限公司 Power adapter

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Publication number Priority date Publication date Assignee Title
US5701243A (en) * 1994-12-12 1997-12-23 Korea Telecommunication Authority High-power factor series resonant rectifier circuit
CN1348248A (en) * 2001-09-10 2002-05-08 南京航空航天大学 High-frequency AC/AC converter with AC link
CN201548631U (en) * 2009-10-28 2010-08-11 中国北车股份有限公司大连电力牵引研发中心 Combined power traction converter load testing device

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Publication number Priority date Publication date Assignee Title
US5701243A (en) * 1994-12-12 1997-12-23 Korea Telecommunication Authority High-power factor series resonant rectifier circuit
CN1348248A (en) * 2001-09-10 2002-05-08 南京航空航天大学 High-frequency AC/AC converter with AC link
CN201548631U (en) * 2009-10-28 2010-08-11 中国北车股份有限公司大连电力牵引研发中心 Combined power traction converter load testing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105337505A (en) * 2015-11-12 2016-02-17 深圳市泰昂能源科技股份有限公司 DC/DC conversion circuit and power supply device
CN106208761A (en) * 2016-08-12 2016-12-07 上海交通大学 Isolated form three-phase AC DC changer
CN109038524A (en) * 2018-08-13 2018-12-18 西安交通大学 A kind of electric current two-way low-voltage direct distribution system active control type limiting protector and its working method
CN111277137A (en) * 2020-03-16 2020-06-12 云南电网有限责任公司电力科学研究院 DCDC converter
WO2022007667A1 (en) * 2020-07-10 2022-01-13 Oppo广东移动通信有限公司 Power adapter

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Application publication date: 20111221