CN102291015A - Uncontrolled rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter - Google Patents
Uncontrolled rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter Download PDFInfo
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- CN102291015A CN102291015A CN2011102069099A CN201110206909A CN102291015A CN 102291015 A CN102291015 A CN 102291015A CN 2011102069099 A CN2011102069099 A CN 2011102069099A CN 201110206909 A CN201110206909 A CN 201110206909A CN 102291015 A CN102291015 A CN 102291015A
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- 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
Abstract
The invention discloses an uncontrolled 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, wherein the step-down circuit converts high-voltage power-frequency alternating-current voltage into high-voltage high-frequency pulse alternating-current voltage by means of an push-pull converter, and 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 outputted low-voltage high-frequency pulse alternating-current voltage is rectified by the rectification circuit, so that doubled-high frequency half-wave alternating-current voltage is obtained, and the 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 inverter circuit to obtain a voltage waveform needed by a user. 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 input power factor, and has the advantages of 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 a kind of AC-DC converter that rectification-direct current is recommended inversion of not controlling.
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, and intermediate link is very complicated, realizes 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, a kind of AC-DC converter that rectification-direct current is recommended inversion of not controlling is provided, 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 AC-DC conversion at secondary side, by single-phase diode not the control rectifier frequency reducing be reduced into two times of high frequency half-wave alternating voltages, provide the output of stable DC voltage through output filter capacitor again, 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 converts the high pressure power frequency ac voltage to high voltagehigh frequency pulse ac voltage by push-pull converter, and obtains low pressure high frequency pulse AC voltage by the high frequency transformer step-down; Rectification circuit carries out rectification to the low pressure high frequency pulse AC voltage of output, obtains the half-wave alternating voltage of two times of high frequencies, and this voltage obtains stable direct current output through output filter capacitor filtering again.Level can the series resonant inverter circuit unit's of obtaining input power factor and the required voltage waveform of user behind the circuit.
Described reduction voltage circuit comprises that successively the input filter 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 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 single-phase input rectifier.
The described reduction voltage circuit of being used forSingle-phase
InputRectifier
Be diode rectifier bridge, the mid point of two brachium pontis links to each other with the output of input filter, and output links to each other with input filter capacitor.
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, first, second contrary switch common emitter of leading connects, its lower end all links to each other with the negative pole of input filter capacitor, the first contrary upper end of leading switch is connected with the first input end of high frequency transformer, and the second contrary upper end of leading 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 positive pole of input filter capacitor, and two ends link to each other with first, second 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 negative pole with the output cathode of high frequency transformer respectively, 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, has simplified circuit structure, has reduced 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.
Embodiment 1
As shown in Figure 1, present embodiment provides a kind of AC-DC converter that rectification-direct current is recommended inversion of not controlling, and 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 high-frequency ac voltage.In the rectification circuit 2, the low pressure high-frequency ac voltage is converted to low-voltage dc voltage, can realizes the conversion of high-voltage alternating to low-voltage direct.
Described reduction voltage circuit 1 comprises that successively the input filter that links to each other (among the figure shown in L1 and the C1), single-phase input rectifier (among the figure shown in D1 ~ D4), input filter capacitor E1, AC chopping are with push-pull converter (among the figure shown in S1 and the S2) and the high frequency transformer T1 that is used for step-down.
The described input filter 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 and single-phase input rectifier are (among the figureShown in D1 ~ D4)
Two inputs link to each other.
The described reduction voltage circuit 1 of being used forSingle-phase
InputRectifier
(among the figureShown in D1 ~ D4)
Be diode rectifier bridge, the mid point of two brachium pontis and input filter are (among the figureShown in L1 and the C1)
Output link to each other output and input filter capacitorE1
Link to each other.
Described input filter capacitorE1
Be the electrochemical capacitor group, cross-over connection is in single-phase input rectifier (among the figureShown in D1 ~ D4)
Output, its positive pole and high frequency transformerT1
Centre cap link to each other, negative pole and AC chopping usefulness push-pull converter are (among the figureShown in S1 and the S2)
Contrary lower end of leading switch link to each other.
DescribedThe AC chopping that is used for reduction voltage circuit 1 is used
The structure of push-pull converter is two contrary mapped structures of recommending of leading the switch composition, and first, second is connected with the S2 common emitter against leading switch S 1, the equal and input filter capacitor in its lower endE1
Negative pole link to each other first contrary upper end and the high frequency transformer of leading switch S 1T1
First input end connect second contrary upper end and the high frequency transformer of leading switch S 2T1
Second input link to each other.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 and input filter capacitorE1
Positive pole link to each other, two ends link to each other with first, second contrary upper end of leading switch S 1 and S2 respectively,The output of high frequency transformer T1 links to each other with two inputs of single-phase output rectifier (among the figure shown in D5 ~ D8) respectively.
Described rectification circuit 2 comprises successively the single-phase output rectifier that links to each other (among the figure shown in D5 ~ D8) and output filter capacitor E2.
The described rectification circuit 2 of being used forSingle-phase output rectifier (among the figure shown in D5 ~ D8)
Be diode rectifier bridge, the mid point of two brachium pontis and high frequency transformerT1
Output link to each other output and output filter capacitorE2
Link to each other.
The described output filter capacitor that is used for rectification circuit 2E2
Be the electrochemical capacitor group, cross-over connection is in single-phase output rectifierD5 ~ D8
Output, its anodal and negative pole link to each other with negative pole with the output cathode of single-phase output rectifier (among the figure shown in D5 ~ D8) respectively.
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 that the conventional transformer volume reduces, weight lightens target and high input power factor, low harmonic current pollute, 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, the AC-DC converter that single-phase input rectifier D1 ~ D4, push-pull converter S1, S2, high frequency transformer T1 and single-phase output rectifier D5 ~ D8 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
As shown in Figure 2, three-phase input, output-parallel do not control the schematic diagram that rectification-direct current is recommended the AC-DC converter of inversion.
Wherein eachDo not control rectification-direct current and recommend the AC-DC converter of inversion
Input link to each other these three groups respectively at any two-phase of three-phase alternating currentDo not control rectification-direct current and recommend 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
As shown in Figure 3, input series connection, output series connection do not control the schematic diagram that rectification-direct current is recommended the AC-DC converter of inversion.
By three groups of same structuresDo not control rectification-direct current and recommend the AC-DC converter of inversion
Form these three groupsDo not control rectification-direct current and recommend 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, suitably select the parameter of input filter capacitor E1, can be so that the net side of converters be operated under the High Power Factor, suppress the pollution of harmonic current, help simplifying circuit design, reduce cost, increase efficient and improve reliability 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 DC chopped-wave 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. do not control the AC-DC converter that rectification-direct current is recommended inversion for one kind, the reduction voltage circuit and the rectification circuit that comprise successively series connection, described reduction voltage circuit comprise that the input filter 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 converts the high pressure power frequency ac voltage to high voltagehigh frequency pulse ac voltage by push-pull converter, and obtains low pressure high frequency pulse AC voltage by the high frequency transformer step-down; Rectification circuit carries out rectification to the low pressure high frequency pulse AC voltage of output, obtains the half-wave alternating voltage of two times of high frequencies, and this voltage obtains stable direct current output through output filter capacitor filtering again.
2. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended inversion, it is characterized in that described input filter 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 single-phase input rectifier.
3. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended inversion, it is characterized in that, described single-phase input rectifier is a diode rectifier bridge, and the mid point of two brachium pontis links to each other with the output of input filter, and output links to each other with input filter capacitor.
4. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended 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. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended 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, first, second contrary switch common emitter of leading connects, its lower end all links to each other with the negative pole of input filter capacitor, the first contrary upper end of leading switch is connected with the first input end of high frequency transformer, and the second contrary upper end of leading switch links to each other with second input of high frequency transformer.
6. do not control the AC-DC converter that rectification-direct current is recommended 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. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended inversion, it is characterized in that, the described high frequency transformer that is used for step-down 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. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended 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. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended 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. according to claim 1ly do not control the AC-DC converter that rectification-direct current is recommended inversion, it is characterized in that, select the parameter of described input filter capacitor and recommend the rule of inversion, can make the net side of converters be operated under the high power factor.
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| CN2011102069099A CN102291015A (en) | 2011-07-22 | 2011-07-22 | Uncontrolled rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter |
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| CN2011102069099A CN102291015A (en) | 2011-07-22 | 2011-07-22 | Uncontrolled rectification-direct-current push-pull inversion AC-DC (alternating current-to-direct current) converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762840A (en) * | 2013-09-09 | 2014-04-30 | 中国科学院光电研究院 | Wide-voltage-input efficient direct-current power converter for aerostat |
| CN111446875A (en) * | 2020-04-24 | 2020-07-24 | 哈尔滨工业大学 | Efficiency improvement method for piezoelectric actuation unit inversion type power amplification circuit |
| CN112042098A (en) * | 2018-04-16 | 2020-12-04 | 太阳食物有限公司 | Power converter for bioelectrochemical systems |
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| JPH09205780A (en) * | 1996-01-26 | 1997-08-05 | Nec Corp | Current feedback type push-pull converter circuit |
| US5701243A (en) * | 1994-12-12 | 1997-12-23 | Korea Telecommunication Authority | High-power factor series resonant rectifier circuit |
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2011
- 2011-07-22 CN CN2011102069099A patent/CN102291015A/en active Pending
Patent Citations (2)
| 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 |
| JPH09205780A (en) * | 1996-01-26 | 1997-08-05 | Nec Corp | Current feedback type push-pull converter circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762840A (en) * | 2013-09-09 | 2014-04-30 | 中国科学院光电研究院 | Wide-voltage-input efficient direct-current power converter for aerostat |
| CN103762840B (en) * | 2013-09-09 | 2016-02-10 | 中国科学院光电研究院 | A kind of aerostatics Width funtion input efficient direct current supply convertor |
| CN112042098A (en) * | 2018-04-16 | 2020-12-04 | 太阳食物有限公司 | Power converter for bioelectrochemical systems |
| CN111446875A (en) * | 2020-04-24 | 2020-07-24 | 哈尔滨工业大学 | Efficiency improvement method for piezoelectric actuation unit inversion type power amplification circuit |
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Application publication date: 20111221 |