CN102291019A - Full-bridge rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter - Google Patents
Full-bridge rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter Download PDFInfo
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Abstract
The invention discloses a full-bridge rectification-direct-current push-pull inversion 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 direct-current voltage by means of a single-phase fully controlled rectification circuit, the high-voltage direct-current voltage is then converted into high-voltage high-frequency pulse alternating-current voltage by a push-pull converter, and the high-voltage high-frequency pulse alternating-current voltage is decreased to low-voltage high-frequency pulse alternating-current voltage by a transformer; the low-voltage high-frequency pulse alternating-current voltage is rectified by the rectification circuit, so that low-voltage direct-current voltage is obtained, and the low-voltage direct-current voltage is then filtered by an output filter capacitor, so that stable direct-current output is obtained. The post-stage circuit can be connected in series with an impedance conversion circuit to obtain linear input impedance, and after the linear input impedance is reflected into a high-voltage alternating-current power grid, grid side linear input impedance and a unit input power factor are obtained. 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, and has the advantages of less power devices, simple overall structure and more complete overall performance.
Description
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 a kind of full-bridge rectification-direct current is recommended inversion.
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, the AC-DC converter that provides a kind of full-bridge rectification-direct current to recommend inversion, 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 direct voltage by the single-phase rectifier frequency reducing, can realize the unit input power factor of net side, suppress the side harmonics electric current, thereafter the level DC-AC circuit of also can connecting provides the user required alternating voltage.
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 is converted to high-voltage dc voltage by single-phase all controlled rectifier circuit with the high pressure power frequency ac voltage, this high-voltage dc voltage converts high voltagehigh frequency pulse ac voltage to by push-pull converter again, and obtains low pressure high frequency pulse AC voltage by the step-down transformer step-down; Rectification circuit carries out rectification to the low pressure high frequency pulse AC voltage of output, obtains low-voltage dc voltage, and this voltage obtains stable direct current output through output filter capacitor filtering again, the while single-phase all controlled rectifier circuit unit of bringing input power factor.
Described reduction voltage circuit comprises that successively the boost inductance that links to each other, single-phase input rectifier, input filter capacitor, AC chopping are with push-pull converter and the high frequency transformer that is used for step-down.
The described boost inductance that is used for reduction voltage circuit is a single inductance, and an end links to each other with the positive pole of AC power, and the other end links to each other with a brachium pontis of single-phase input rectifier.
The described single-phase input rectifier that is used for reduction voltage circuit is led the type switch by four bridge joints contrary and is formed, and forms two brachium pontis, and its another input links to each other with the negative pole of AC power.Single-phase input rectifier can adopt the modulation algorithm and the control principle of all single-phase rectifiers, wherein can also comprise the single-phase power factor correcting algorithm, obtains stable DC output voltage and linear input impedance.
Described input filter capacitor is the electrochemical capacitor group, and cross-over connection is in the output of single-phase input rectifier, and its positive pole links to each other with the centre cap of high frequency transformer, and negative pole links to each other with the contrary lower end of leading switch 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 two contrary mapped structures of recommending of leading the switch composition, five, the 6th contrary switch in parallel of leading, its lower end all links to each other with the negative pole of input filter capacitor, the 5th contrary upper end of leading switch is connected with the input of high frequency transformer is anodal, and the 6th contrary upper end of leading switch links to each other with the input negative pole 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 positive pole of input filter capacitor, and two ends link to each other with the 5th, the 6th contrary upper end of leading switch respectively,The output of high frequency transformer links to each other with two inputs of single-phase output rectifier respectively.
Described rectification circuit comprises the single-phase output rectifier and the output filter capacitor that link to each other successively.
The described rectification circuit of being used forSingle-phase output rectifier
Be diode rectifier bridge, the mid point of two brachium pontis links to each other with the output of high frequency transformer, and output links to each other with output filter capacitor.
Described output filter capacitor is the electrochemical capacitor group, and cross-over connection is in the output of single-phase output rectifier, and its positive pole links to each other with negative pole with the output cathode of single-phase output rectifier respectively with negative pole.
Compared with prior art, the present invention has following effect: 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.Net side Power Conversion link has only adopted two power devices, simplifies circuit structure, reduces manufacturing cost, has advantages such as novel, economical and practical, that system bulk is little, environment protecting is 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.
As shown in Figure 1, the AC-DC converter that present embodiment provides a kind of full-bridge rectification-direct current to recommend inversion comprises: 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 high-frequency ac voltage.In the rectification circuit 2, the low pressure high-frequency ac voltage is converted to low-voltage dc voltage, but back level series impedance translation circuit obtains linear input impedance and the impedance of linear net side, guarantees good net side power factor.
Described reduction voltage circuit 1 comprises that successively the boost inductance L1 that links to each other, single-phase input rectifier (among the figure shown in S1 ~ S4), input filter capacitor E1, AC chopping are with push-pull converter (among the figure shown in S5 and the S6) and the high frequency transformer T1 that is used for step-down.
The described boost inductance L1 that is used for reduction voltage circuit 1 is a single inductance, and an end links to each other with the anodal ACL of AC power, and (brachium pontis of S1 among the figure ~ S4) links to each other for the other end and single-phase input rectifier.
(figure S1 ~ S4) leads the type switch by four bridge joints contrary and forms the described single-phase input rectifier that is used for reduction voltage circuit 1, forms two brachium pontis, and its another input links to each other with the negative pole ACN of AC power.Single-phase input rectifier can adopt the modulation algorithm and the control principle of all single-phase rectifiers, wherein can also comprise the single-phase power factor correcting algorithm, obtains stable DC output voltage and linear input impedance.
The described input filter capacitor that is used for reduction voltage circuit 1E1
Be the electrochemical capacitor group, cross-over connection is in single-phase input rectifier (output of S1 among the figure ~ S4), its positive pole and high frequency transformerT1
Centre cap link to each other negative pole and AC chopping linking to each other with the lower end of S6 with push-pull converter (S5 and S6 among the figure) against leading switch S 5.
DescribedThe AC chopping that is used for reduction voltage circuit 1 is used
Push-pull converter(S5 and S6 among the figure)
Structure be two and contrary lead the mapped structures of recommending that switch forms that the 5th, the 6th contrary to lead switch S 5 in parallel with S6, the equal and input filter capacitor in its lower endE1
Negative pole link to each other, the 5th contrary upper end of leading switch S 5 is connected with the input of high frequency transformer T1 is anodal, the 6th links to each other with the input negative pole of high frequency transformer T1 against the upper end of leading switch S 6.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 T1 that is used for reduction voltage circuit 1
Elementary winding with two series aiding connections, its centre cap links to each other with the positive pole of input filter capacitor E1, and two ends link to each other with the upper end of S6 against leading switch S 5 with the 5th, the 6th respectively,(two inputs of D1 among the figure ~ D4) link to each other the output of high frequency transformer with single-phase output rectifier respectively.
Described rectification circuit 2 comprises successively the single-phase output rectifier that links to each other (D1 among the figure ~ D4) and output filter capacitor
E2
The described rectification circuit 2 of being used forSingle-phase output rectifier (D1 among the figure ~ D4)
Be diode rectifier bridge, the mid point of two brachium pontis links to each other with the output of high frequency transformer T1, and output links to each other with output filter capacitor E2.
The described output filter capacitor E2 that is used for rectification circuit 2 is the electrochemical capacitor group, and ((output cathode of D1 among the figure ~ D4) links to each other with negative pole with single-phase output rectifier respectively for the output of D1 among the figure ~ D4), its anodal and negative pole in single-phase output rectifier in cross-over connection.
In this example: the single phase alternating current (A.C.) input voltage is 10kV, the AC-DC converter that single-phase input rectifier S1 ~ S4, push-pull converter S5, S6, high frequency transformer T1 and single-phase output rectifier D1 ~ D4 etc. constitute,
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
Full-bridge rectification-the direct current of three-phase input as shown in Figure 2,, output-parallel is recommended the schematic diagram of the AC-DC converter of inversion.
Wherein eachFull-bridge rectification-direct current is recommended the AC-DC converter of inversion
Input link to each other these three groups respectively at any two-phase of three-phase alternating currentFull-bridge rectification-direct current is recommended the AC-DC converter of inversion
Output parallel connection and output dc voltage.
Present embodiment can avoid static exciter saturated, supports bigger power output.
Embodiment 3
Full-bridge rectification-the direct current of input series connection as shown in Figure 3,, output series connection is recommended the schematic diagram of the AC-DC converter of inversion.
By three groups of same structuresFull-bridge rectification-direct current is recommended the AC-DC converter of inversion
Form these three groupsFull-bridge rectification-direct current is recommended the AC-DC converter of inversion
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, need not back level series impedance translation circuit, just can be so that the net side of converters is operated under the unity power factor, the harmonic carcellation electric current helps simplifying circuit design, reduces cost, increases efficient and improves reliability the pollution of electrical network.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, realizes that the high pressure industrial-frequency alternating current is pressed onto the high voltagehigh frequency AC voltage conversion, 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.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. a full-bridge rectification-direct current is recommended the AC-DC converter of inversion, it is characterized in that: comprise successively the reduction voltage circuit and the rectification circuit of series connection, described reduction voltage circuit comprises that the boost inductance that links to each other successively, single-phase input rectifier, input filter capacitor, AC chopping are with push-pull converter and the high frequency transformer that is used for step-down;
Described rectification circuit comprises single-phase output rectifier and the output filter capacitor that links to each other successively;
Wherein: reduction voltage circuit is converted to high-voltage dc voltage by single-phase all controlled rectifier circuit with the high pressure power frequency ac voltage, this high-voltage dc voltage converts high voltagehigh frequency pulse ac voltage to by push-pull converter again, and obtains low pressure high frequency pulse AC voltage by the step-down transformer step-down; Rectification circuit carries out rectification to the low pressure high frequency pulse AC voltage of output, obtains low-voltage dc voltage, and this voltage obtains stable direct current output through output filter capacitor filtering again.
2. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, the described boost inductance that is used for reduction voltage circuit is a single inductance, and an end links to each other with the positive pole of AC power, and the other end links to each other with a brachium pontis of single-phase input rectifier.
3. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, described single-phase input rectifier is made up of against leading the type switch four bridge joints, forms two brachium pontis, and its another input links to each other with the negative pole of AC power.
4. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, described input filter capacitor is the electrochemical capacitor group, cross-over connection is in the output of single-phase input rectifier, its positive pole links to each other with the centre cap of high frequency transformer, and negative pole links to each other with the contrary lower end of leading switch of AC chopping with push-pull converter.
5. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, described AC chopping is two contrary mapped structures of recommending of leading the switch composition with the structure of push-pull converter, five, the 6th contrary switch in parallel of leading, the lower end all links to each other with the negative pole of input filter capacitor, the 5th contrary upper end of leading switch is connected with the input of high frequency transformer is anodal, and the 6th contrary upper end of leading switch links to each other with the input negative pole of high frequency transformer.
6. full-bridge rectification-direct current is recommended the AC-DC converter of inversion according to claim 1 or 5, it is characterized in that, described AC chopping adopts the pulse control signal of 50% duty ratio with push-pull converter, or employing obtains the positive and negative high-frequency pulse voltage that replaces based on the pulse control signal of other modulation algorithm and control principle.
7. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, 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 positive pole of input filter capacitor, two ends link to each other with first, second contrary upper end of leading switch respectively, and the output of high frequency transformer links to each other with two inputs of single-phase output rectifier respectively.
8. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, described single-phase output rectifier is a diode rectifier bridge, and the mid point of two brachium pontis links to each other with the output of high frequency transformer, and output links to each other with output filter capacitor.
9. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, described output filter capacitor is the electrochemical capacitor group, and cross-over connection is in the output of single-phase output rectifier, and its positive pole links to each other with negative pole with the output cathode of single-phase output rectifier respectively with negative pole.
10. full-bridge rectification-direct current according to claim 1 is recommended the AC-DC converter of inversion, it is characterized in that, the AC-DC converter of recommending inversion by three groups of described full-bridge rectification-direct currents is formed the full-bridge rectification-direct current of three-phase input, output-parallel and is recommended the AC-DC converter of inversion, wherein each full-bridge rectification-direct current input of recommending the AC-DC converter of inversion links to each other respectively at any two-phase of three-phase alternating current, and these three groups of full-bridge rectification-direct currents are recommended the output parallel connection and the output dc voltage of the AC-DC converter of inversion;
Perhaps, recommended the AC-DC converter of inversion forms the input string connection, exports the AC-DC converter that the full-bridge rectification-direct current of connecting is recommended inversion by three groups of described full-bridge rectification-direct currents, these three groups of full-bridge rectification-direct currents are recommended the input series connection of the AC-DC converter of inversion, output series connection and output dc voltage.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103501128A (en) * | 2013-10-08 | 2014-01-08 | 上海理工大学 | Two-element chopping directional coupling isolation converter |
| CN105120562A (en) * | 2015-08-31 | 2015-12-02 | 上海泓语电气技术有限公司 | High-voltage DC LED lighting driving circuit based on multi-pulse rectification |
| WO2016206269A1 (en) * | 2015-06-24 | 2016-12-29 | 中兴通讯股份有限公司 | Power conversion device and configuration method thereof |
| CN107171566A (en) * | 2017-06-06 | 2017-09-15 | 绵阳市维博电子有限责任公司 | A kind of transformer coupled isolated amplifier of parallel connection chopping type |
| CN107516900A (en) * | 2017-09-04 | 2017-12-26 | 国家电网公司 | A kind of harmonic wave extracting method and device based on magnetic unbalance principle |
| US20180262117A1 (en) * | 2017-03-08 | 2018-09-13 | Delta Electronics (Shanghai) Co., Ltd | Power electronic conversion unit and system |
| CN109713917A (en) * | 2017-10-25 | 2019-05-03 | 中兴通讯股份有限公司 | Fairing and rectification control method |
| CN110401358A (en) * | 2018-04-25 | 2019-11-01 | 马春辉 | Inverter component, welding/cutting power supply output device and welding and cutting device |
| CN110849413A (en) * | 2019-05-30 | 2020-02-28 | 天津市津源供电设备有限公司 | Oil-immersed transformer monitoring system |
| CN113037107A (en) * | 2021-03-04 | 2021-06-25 | 广东电网有限责任公司 | Topological structure of power electronic transformer |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103501128A (en) * | 2013-10-08 | 2014-01-08 | 上海理工大学 | Two-element chopping directional coupling isolation converter |
| US10284093B2 (en) | 2015-06-24 | 2019-05-07 | Zte Corporation | Power conversion apparatus and method for configuring the same |
| WO2016206269A1 (en) * | 2015-06-24 | 2016-12-29 | 中兴通讯股份有限公司 | Power conversion device and configuration method thereof |
| CN107231097A (en) * | 2015-06-24 | 2017-10-03 | 中兴通讯股份有限公司 | Power conversion unit and its method to set up |
| CN105120562A (en) * | 2015-08-31 | 2015-12-02 | 上海泓语电气技术有限公司 | High-voltage DC LED lighting driving circuit based on multi-pulse rectification |
| US10811983B2 (en) * | 2017-03-08 | 2020-10-20 | Delta Electronics (Shanghai) Co., Ltd | Power electronic conversion unit and system |
| US20180262117A1 (en) * | 2017-03-08 | 2018-09-13 | Delta Electronics (Shanghai) Co., Ltd | Power electronic conversion unit and system |
| CN107171566A (en) * | 2017-06-06 | 2017-09-15 | 绵阳市维博电子有限责任公司 | A kind of transformer coupled isolated amplifier of parallel connection chopping type |
| CN107516900B (en) * | 2017-09-04 | 2020-05-12 | 国家电网公司 | Harmonic extraction method and device based on magnetic unbalance principle |
| CN107516900A (en) * | 2017-09-04 | 2017-12-26 | 国家电网公司 | A kind of harmonic wave extracting method and device based on magnetic unbalance principle |
| CN109713917A (en) * | 2017-10-25 | 2019-05-03 | 中兴通讯股份有限公司 | Fairing and rectification control method |
| CN110401358A (en) * | 2018-04-25 | 2019-11-01 | 马春辉 | Inverter component, welding/cutting power supply output device and welding and cutting device |
| CN110849413A (en) * | 2019-05-30 | 2020-02-28 | 天津市津源供电设备有限公司 | Oil-immersed transformer monitoring system |
| CN113037107A (en) * | 2021-03-04 | 2021-06-25 | 广东电网有限责任公司 | Topological structure of power electronic transformer |
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Application publication date: 20111221 |
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