CN101494420B - Bidirectional energy transfer circuit - Google Patents
Bidirectional energy transfer circuit Download PDFInfo
- Publication number
- CN101494420B CN101494420B CN2009100585495A CN200910058549A CN101494420B CN 101494420 B CN101494420 B CN 101494420B CN 2009100585495 A CN2009100585495 A CN 2009100585495A CN 200910058549 A CN200910058549 A CN 200910058549A CN 101494420 B CN101494420 B CN 101494420B
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- circuit
- commutation
- igbt
- back axle
- commutation circuit
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a bidirectional energy transfer circuit, solving the problems of inversion and charging which are realized by two independent circuits, single direction energy transfer, low voltage transferring efficiency and large filter circuit size in the existing direct current supply. The direct current supply is connected with a front axle which is connected with a primary side of a high-frequency transformer and consists of four transistors; a secondary side of the high-frequency transformer is connected with a rear axle which consists of eight transistors and is connected with a load through a first and a second commutation circuit; the load is connected with a commercial power input end through a third commutation circuit; output and input of a rectifier bridge are respectively connected with the rear axle through the first commutation circuit; a controller is respectively connected with the commutation circuits and a drive circuit; output of the drive circuit is respectively connected with the front axle and the rear axle through the second commutation circuit; and the first, the second and the third commutation circuits are respectively formed by two relays or switching circuits.
Description
Technical field:
The present invention is relevant with the inversion and the charging device of DC power supply.
Background technology:
At present, in the inversion and charging of the overwhelming majority's emergency power supply, charging and inversion are two independent circuit, and energy is that folk prescription is to transmission, as shown in Figure 1.Wherein the course of work of inverter circuit is: direct current becomes positive and negative square wave by propons, boosts by transformer then, and all wave conversions by back axle obtain sine wave at last; The work engineering of charging circuit is: civil power becomes direct current by rectifier bridge earlier, becomes needed direct current by buck circuit then.
Summary of the invention:
The purpose of this invention is to provide the circuit that a kind of bidirectional energy that charging circuit and inverter circuit can be united two into one transmits.
The present invention is achieved in that
Bidirectional energy transfer circuit of the present invention, DC power supply is connected with propons, propons is connected with the former limit of high frequency transformer, propons is made of four transistors, the secondary of high frequency transformer is connected with back axle, back axle is made of eight transistors, back axle is by first, two commutation circuits are connected with load, negative cutting by the 3rd commutation circuit is connected with the mains electricity input end, the output of rectifier bridge is connected with back axle by first commutation circuit respectively with input, be connected with negative cutting by second commutation circuit, controller is connected with drive circuit with commutation circuit respectively, the output of drive circuit is connected with back axle with propons respectively, and first, two, three commutation circuits are made of two relays or switching circuit respectively.
Back axle is connected with filter circuit by first commutation circuit, and filter circuit is connected with load by second commutation circuit.
Commutation circuit is made of 1-6 electromagnetic relay J1-J6, the 1st of first commutation circuit, 2 relay J 1, the common port 1 of J2 is connected with back axle, normally opened contact 3 is by the electromagnetic relay J3 of the rectifier bridge and second commutation circuit, the normally opened contact of J4 connects, the 1st, the normally-closed contact of 2 electromagnetic relays is by filter circuit and the 3rd, 4 electromagnetic relay J3, the normally-closed contact of J4 connects, the 3rd, the common port 1 of 4 electromagnetic relays and the 5th of load and the 3rd commutation circuit, 6 electromagnetic relay J5, the common port of J6 connects, the 5th, the normally opened contact 2 of 6 relays is electrically connected with the city, and the control end of 1-6 electromagnetic relay is connected with controller.
Propons is made of 1-4 igbt VS1-VS4,1st, 3 and the 2nd, 4 igbts are contacted respectively, two series circuits are in parallel and are connected with DC power supply, the centre tap of two series circuits is connected with high frequency transformer, each is connected the emitter of 1-4 igbt with the negative pole of a diode, the positive pole of diode is connected with the collector electrode of igbt, the control utmost point of igbt is connected with the output of 1-4 drive circuit respectively, and the input of 1-4 drive circuit is connected with controller respectively.
Back axle is made of the 5-12 igbt, 5-8 and 9-12 igbt are connected respectively, be connected with the high frequency transformer secondary after the two series circuit parallel connections, the centre tap of two series circuits is connected with first commutation circuit, each is connected the emitter of 5-12 igbt with the negative pole of a diode, the positive pole of diode is connected with the collector electrode of igbt, the 6th, 8,10,12, the emitter of igbt is respectively with the 5th, 7,9, the emitter of 11 igbts connects, the control utmost point of 5-12 igbt is connected with the output of 5-12 drive circuit respectively, and the input of 5-12 drive circuit is connected with controller respectively.
The invention provides the circuit that a kind of bidirectional energy transmits, it is made up of main circuit and commutation circuit, and wherein main circuit is made up of propons, high frequency transformer and back axle.
The invention provides a kind of circuit that can the energy bi-directional, it realizes (as shown in Figure 2) by following two loops:
Inversion circuit: direct current makes voltage be output as sine wave by propons (this moment act as inversion), high frequency transformer, back axle (effect of this moment is all wave conversions) and LC filtering successively.The commutation circuit of this moment links up the output and the LC filtering of all wave conversions, and what the waveform of Shu Chu sine wave will be good like this is many.
Charge circuit: the commutation circuit of this moment links up back axle and rectifier bridge.Civil power is successively by rectifier bridge rectification, back axle (effect of this moment is inversion), high frequency transformer, propons (effect of this moment is rectification) output DC.
Need to prove:
Described propons and back axle in inversion and two processes of charging operation principle and the number of the IGBT (igbt) of actual participation work be different;
The break-make control of described IGBT (igbt) is finished by controller and corresponding driving circuit.
The course of work of the present invention is made of the course of work of inversion circuit and the course of work of charge circuit:
The course of work of inversion circuit: direct current becomes positive and negative square wave by be made of propons (this moment act as inversion) four IGBT (igbt), boost by high frequency transformer then, then make voltage be output as sine wave by the back axle (effect of this moment is all wave conversions) that constitutes by eight IGBT (igbt), the commutation circuit of this moment links up the output and the LC filtering of all wave conversions, and what the waveform of Shu Chu sine wave will be good like this is many.
The course of work of charge circuit: the commutation circuit of this moment links up back axle and rectifier bridge.Civil power becomes positive and negative square wave by back axle (effect of this moment is inversion) then by the rectifier bridge rectification, then by the high frequency transformer step-down, then by propons (effect of this moment is rectification) output DC.
The invention has the beneficial effects as follows traditional charging, two independent circuit of inversion are united two into one, make it work in different patterns, the circuit that can realize the energy two-way flow of inversion and charging is provided by the relay switching.In addition, because device of this circuit and control employing is high frequency, this will improve the voltage transformation efficiency widely, reduce the volume of filter capacitor inductance.
Description of drawings:
Inversion that Fig. 1 is traditional and charging circuit
Fig. 2 is the block diagram of circuit of the present invention
Fig. 3 is the schematic diagram of circuit of the present invention
Embodiment:
The present invention includes as the lower part: the 1st, storage battery, VS1-VS4, VS5a-VS8a, VS5b-VS8b is IGBT (igbt), the 2nd, high frequency transformer, J1-J6 are that (electromagnetic relay has 5 terminals, the 1st, common port to electromagnetic relay, the 2nd, often open, the 3rd, normally closed, 4 and 5 is control ends), the 3rd, inductance, the 4th, electric capacity, the 5th, rectifier bridge; DSP is a controller, and M57962L is a drive circuit.
The present invention realizes (as shown in Figure 3) according to following two loops:
1, inversion circuit: controller sends signal makes the actuating of relay of commutation circuit that contact 1 and 3 is coupled together, and what the output of back axle connect at this moment is the LC filter.Direct current is at first by propons (this moment operation principle be inversion), its course of work be pipe VS1 and VS4 when opening simultaneously pipe VS2 and VS3 turn-off, otherwise pipe VS1 and VS4 turn-offed when pipe VS2 and VS3 opened simultaneously.VS1 and VS4, VS2 and VS3 can not be open-minded simultaneously, will be short-circuited if open simultaneously.Pipe turns on and off the positive and negative square wave that direct current is become high frequency at a high speed.When pipe VS1 and VS4 opened, electric current, was got back to power supply negative terminal by VS4 then and is formed a complete loops just successively by VS1, the former limit of transformer from power supply, and what establish that this moment, the transformer secondary produced is the positive voltage wave mode; When pipe VS2 and VS3 were logical, electric current, was got back to power supply negative terminal by VS3 then and is formed a complete loops just successively by VS2, the former limit of transformer from power supply, and what establish that this moment, the transformer secondary produced is the negative voltage wave mode.Boost by high frequency transformer then, then carry out all wave conversions by back axle.Its course of work is: pipe VS5a, VS6b, VS7b, VS8a open and pipe VS5b, VS6a, VS7a, VS8b shutoff at this moment simultaneously, when transformer secondary terminal voltage of the same name is timing, the other end that electric current is got back to secondary from the inverse parallel diode that brings out the inverse parallel diode sent out successively through VS5a, VS5b, LC filtering, load, VS8a, VS8b of the same name forms a complete loop.When transformer secondary terminal voltage of the same name when negative, electric current is got back to end of the same name from the other end through the inverse parallel diode of the inverse parallel diode of VS7b, VS7a, LC filtering, load, VS6b, VS6a and is formed a complete loop.The voltage that load this moment obtains is negative just down on all being; Otherwise the voltage that load obtains all is just to go up down to bear.If the switching frequency of pipe is 50HZ, then will export the 50HZ sine wave.The sine wave of output is by LC filtering, will make many that sinusoidal wave waveform will be good like this;
2, charge circuit: controller sent signal electromagnetic relay contact 1 and 2 was linked up in commutation circuit action this moment, thereby back axle and rectifier bridge are linked up.Civil power becomes positive and negative square wave by back axle (effect of this moment is inversion) then by the rectifier bridge rectification, has only VS5b, VS8b, four pipe works of VS7a, VS6a this moment.Terminal voltage of the same name had been for just when wherein VS5b, VS8b opened other pipe and close, and terminal voltage of the same name was for negative when VS7a, VS6a opened other pipe and close.By regulating duty ratio, the amplitude of adjustable output voltage.Then by the high frequency transformer step-down, then by propons (this moment, propons was the rectifier bridge that is made of IGBT inner counter diode connected in parallel) rectification output DC.
Claims (1)
1. bidirectional energy transfer circuit, it is characterized in that DC power supply is connected with propons, propons is connected with the former limit of high frequency transformer, propons is made of four transistors, the secondary of high frequency transformer is connected with back axle, back axle is made of eight transistors, back axle is by first, two commutation circuits are connected with load, load is connected with the mains electricity input end by the 3rd commutation circuit, the output of rectifier bridge is connected with back axle by first commutation circuit respectively with input, be connected with load by second commutation circuit, controller is connected with drive circuit with commutation circuit respectively, the output of drive circuit is connected with back axle with propons respectively, first, two, three commutation circuits are made of two relays or switching circuit respectively, back axle is connected with filter circuit by first commutation circuit, filter circuit is connected with load by second commutation circuit, commutation circuit is made of 1-6 electromagnetic relay J1-J6, the 1st of first commutation circuit, 2 relay J 1, the common port of J2 (1) is connected with back axle, normally opened contact (3) is by the electromagnetic relay J3 of the rectifier bridge and second commutation circuit, the normally opened contact of J4 connects, the 1st, the normally-closed contact of 2 electromagnetic relays is by filter circuit and the 3rd, 4 electromagnetic relay J3, the normally-closed contact of J4 connects, the 3rd, common port of 4 electromagnetic relays (1) and the 5th of load and the 3rd commutation circuit, 6 electromagnetic relay J5, the common port of J6 connects, the 5th, the normally opened contact of 6 relays (2) is electrically connected with the city, the control end of 1-6 electromagnetic relay is connected with controller, propons is made of 1-4 igbt VS1-VS4, the 1st, the 3 and the 2nd, 4 igbts are contacted respectively, two series circuits are in parallel and are connected with DC power supply, the centre tap of two series circuits is connected with high frequency transformer, each is connected the emitter of 1-4 igbt with the negative pole of a diode, the positive pole of diode is connected with the collector electrode of igbt, the control utmost point of igbt is connected with the output of 1-4 drive circuit respectively, the input of 1-4 drive circuit is connected with controller respectively, back axle is made of the 5-12 igbt, 5-8 and 9-12 igbt are connected respectively, be connected with the high frequency transformer secondary after the two series circuit parallel connections, the centre tap of two series circuits is connected with first commutation circuit, each is connected the emitter of 5-12 igbt with the negative pole of a diode, the positive pole of diode is connected with the collector electrode of igbt, the 6th, 8,10, the emitter of 12 igbts is respectively with the 5th, 7,9, the emitter of 11 igbts connects, the control utmost point of 5-12 igbt is connected with the output of 5-12 drive circuit respectively, and the input of 5-12 drive circuit is connected with controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100585495A CN101494420B (en) | 2009-03-10 | 2009-03-10 | Bidirectional energy transfer circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100585495A CN101494420B (en) | 2009-03-10 | 2009-03-10 | Bidirectional energy transfer circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101494420A CN101494420A (en) | 2009-07-29 |
| CN101494420B true CN101494420B (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100585495A Expired - Fee Related CN101494420B (en) | 2009-03-10 | 2009-03-10 | Bidirectional energy transfer circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104811047B (en) * | 2014-01-27 | 2019-03-15 | 山特电子（深圳）有限公司 | Two-way DC/DC converter and its control method |
| CN105978321B (en) * | 2016-06-30 | 2018-08-24 | 西安特锐德智能充电科技有限公司 | A kind of bi-directional DC-DC power control circuit and its control method |
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2009
- 2009-03-10 CN CN2009100585495A patent/CN101494420B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101494420A (en) | 2009-07-29 |
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