CN105743355A - Bidirectional converter structure of energy storage device and control method - Google Patents
Bidirectional converter structure of energy storage device and control method Download PDFInfo
- Publication number
- CN105743355A CN105743355A CN201610216145.4A CN201610216145A CN105743355A CN 105743355 A CN105743355 A CN 105743355A CN 201610216145 A CN201610216145 A CN 201610216145A CN 105743355 A CN105743355 A CN 105743355A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- storage device
- power
- control method
- reversible transducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
Abstract
The invention discloses a bidirectional converter structure of an energy storage device and a control method. In order to fundamentally eliminate a power backflow phenomenon and reduce the current stress of a bidirectional converter, a zero-crossing control method for inductor current is proposed. By adjusting the duty ratio, the size of transmission power is controlled; by switching different control modes, and control on power transmission and direction between a bus and the energy storage device is achieved; and since a conversion topological structure on one side adopts a push-pull structure, and the working efficiency during large-current application is improved.
Description
Technical field
The present invention relates to two-way DC converter, particularly relate to reversible transducer structure and the control method of a kind of energy storage device.
Background technology
Reversible transducer is that energy can in the both sides two-way flow of changer.Due in a set of topological structure, it is achieved that be equivalent to the function of 2 uni-directional converter, so in the application needing energy in bidirectional flow, such as occasions such as direct-current micro-grid, electric automobile, micro-net-connected controllers, it is possible to significantly reduce volume and the cost of system.The control mode of typical two-way changing circuit, what research was relatively many is that tradition phase-shifting controls and dual phase shifting control, and what use is all full-bridge topologies, but it is as the increase of voltage-regulation ratio, backflow power is also increasing, and owing to the switching tube used is more, reduces work efficiency.Be not inherently eliminated power backflow phenomenon so that power device, magnetics loss increase, reduce changer work efficiency, it is important to the existence of power backflow phenomenon, had a strong impact on the work efficiency of changer.
For the shortcoming improving above-mentioned control method, reduce power backflow and the current stress of reversible transducer, the present invention proposes a kind of inductive current zero passage PWM control method, and the combination topology of full-bridge topology and push-pull topology, owing to U2 side employs push-pull configuration, so U2 can be operated in current state.U2 side can connect accumulator or lithium battery etc. can the energy storage device of current work greatly.Comparing phase shifting control, it completely eliminates power backflow phenomenon, and has less current stress, simplifies the relation driving signal of the switching tube of full-bridge both sides simultaneously so that realizes motility and strengthens.It is particularly suited for electric automobile, submarine, photovoltaic plant and power station etc. and needs the application scenario of energy storage device.
Summary of the invention
The present invention proposes a kind of inductive current zero passage PWM control method and the combination of full-bridge topology and push-pull topology, to solve deficiency of the prior art, completely eliminates power backflow phenomenon.Make simultaneously U2 side can better coordinate accumulator or lithium battery etc. can the energy storage device of current work greatly, improve work efficiency.
The inductive current Super-zero control that the present invention proposes, it is possible to above-mentioned power backflow phenomenon is completely eliminated, thus putting forward high-power efficiency of transmission.Simultaneously because U2 side employs push-pull configuration so that in hgher efficiency when current state works of U2.By detecting inductive current zero-acrross ing moment, cut off the electric current carrying pathway of full-bridge side, stop the generation of power backflow phenomenon.Operation principle and the duty of inductive current Super-zero control is analyzed in detail below from two aspects.The U1 > nU2 that has ready conditions in discussion process meets, and the no-load voltage ratio n:1 of transformator T1 refers to the former limit turn ratio to secondary c and e two ends, and wherein the coil turn at c and e two ends and the coil turn at e and d two ends are equal.
Forward U1 side to U2 side, changer Working state analysis.Assume that changer has worked in steady statue, the operation principle waveform of the inductive current Super-zero control according to Fig. 2, is divided into 4 kinds of states by the duty that changer forward power is transmitted, due to symmetrical relation, front 2 kinds of states are only described herein, and rear 2 kinds of states are in like manner known.
The state 1:t0-t1 stage.As depicted in figs. 1 and 2, in the t0 moment, Q1 and Q4 turns on, and Q5 is also switched on, and inductive current iL now is 0, and the terminal voltage of inductance is U1-nU2, then cause that the electric current iL in inductance starts to be gradually increased from 0.In this case, U1 lateral U2 side forward power, simultaneously energy storage in the lateral inductance L1 of U1.
The state 2:t1-t2 stage.As depicted in figs. 1 and 2, in the t1 moment, Q1 turns off, and Q3 and Q4 turns on, and Q5 is also switched on, and now inductive current iL is (U1-nU2) Ton/L.The terminal voltage of inductance is-nU2, then owing to Q3 and Q4 turns on, provide path to the afterflow of inductive current so that in inductance, the energy of storage continues forward feeding U2 side.Detecting inductive current whether zero passage in the t1-t2 stage, if zero passage, illustrate, be stored in the energy in inductance to be completely fed to U2 side, Q4 and Q5 turns off this moment, to prevent U2 to L1 energy storage, namely stops the generation of power backflow phenomenon.Above-mentioned 2 kinds of states, described in front half working cycle, and power is sent to the situation of U2 side from U1.Within rear half working cycle, and detecting inductive current whether zero passage in the t3-t4 stage, if zero passage, illustrate, be stored in the energy in inductance to be completely fed to U2 side, Q3 and Q6 turns off this moment, to prevent U2 to L1 energy storage, namely stops the generation of power backflow phenomenon.Other are the opposite polarity of corresponding voltage and current, and operation principle is the same with front half working cycle.
Assume that changer has worked in steady statue, the operation principle waveform of the inductive current Super-zero control according to Fig. 2, is divided into 4 kinds of states by the duty of changer reverse power transmission, due to symmetrical relation, front 2 kinds of states are only described herein, and rear 2 kinds of states are in like manner known.
The state 1:t0-t1 stage.As shown in figures 1 and 3, in the t0 moment, Q3 and Q4 turns on, and Q5 is also switched on, and inductive current iL now is 0, and the terminal voltage of inductance is-nU2, then cause that the electric current iL in inductance starts to increase to negative direction gradually from 0.In this case, energy storage in the lateral inductance L1 of U2.
The state 2:t1-t2 stage.As shown in figures 1 and 3, in the t1 moment, Q3 turns off, and Q1 and Q4 turns on, and Q5 is also switched on, and inductive current iL now is (-nU2) Ton/L.The terminal voltage of inductance is U1-nU2, then Q1 and Q4 turns on, and provides path to the afterflow of inductive current so that in inductance, the energy back of storage delivers to U1 side.Detecting the whether zero passage of inductive current in the t1-t2 stage, if zero passage, illustrate, be stored in the energy in inductance to send into U1 side completely, Q1 and Q5 turns off this moment, to prevent U1 to L1 energy storage, namely stops the generation of power backflow phenomenon.Above-mentioned 2 kinds of states, described in front half working cycle, and power is sent to the situation of U1 side from U2.Within rear half working cycle, and detecting inductive current whether zero passage in the t3-t4 stage, if zero passage, illustrate, be stored in the energy in inductance to send into U1 side completely, Q2 and Q6 turns off this moment, to prevent U1 to L1 energy storage, namely stops the generation of power backflow phenomenon.Other are the opposite polarity of corresponding voltage and current, and operation principle is the same with front half working cycle.
Advantages of the present invention: owing to have employed inductive current zero passage detection, completely eliminates the power backflow phenomenon in reversible transducer, simultaneously because U2 side employs push-pull configuration so that in hgher efficiency when current state works of U2.
Accompanying drawing explanation
Fig. 1 is the reversible transducer structure of one embodiment of the invention energy storage device.
Fig. 2 is voltage current waveform in one embodiment of the invention forward power transmission topology.
Fig. 3 is voltage current waveform in one embodiment of the invention reverse power transmission topology.
Fig. 4 is the relation of one embodiment of the invention forward power and dutycycle D.
Fig. 5 is the relation of one embodiment of the invention reverse transfer power and dutycycle D.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.Technical scheme in the clear complete description embodiment of the present invention.Based on embodiments of the invention, those skilled in the art, if not making under performing creative labour premise, then drawn every other embodiment is all in protection scope of the present invention.
The present invention proposes reversible transducer structure and the control method of a kind of energy storage device, completely eliminates power backflow phenomenon, and has less current stress, and U2 side employs push-pull configuration.
Forward U1 side, to U2 side, as depicted in figs. 1 and 2, makes t0=0, then t1=Ton, wherein Ton < T/2
P1==
P1 represents, the performance number that the forward of U2 side is transmitted by U1 side；
Wherein D=Ton/T is dutycycle, and 0≤D < nU2/2U1.F is operating frequency.L is the inductance value of inductance L1.
Further embodiment of this invention, brings concrete parameter into, analyzes the relation of reverse transfer power and dutycycle D.Making U1=310v, U2=12V, n=20, f=50KHz, the inductance value of inductance L1 takes 200uH, 300uH and 400uH respectively.Obtain Fig. 4.From fig. 4 it can be seen that along with the increase of dutycycle D, the through-put power of forward is also increasing.And when other condition is certain, the maximum power value of forward transmission is relevant with the inductance value of inductance L1.Namely the inductance value of inductance L1 is more little, then the maximum power value of forward transmission is more big.
Reverse U2 side, to U1 side, as shown in figures 1 and 3, makes t0=0, then t1=Ton, wherein Ton < T/2,
P2=+=
P2 represents, the U2 side performance number reversely transmitted to U1 side；
Wherein D=Ton/T is dutycycle, and 0≤D < (0.5-nU2/2U1).F is operating frequency.L is the inductance value of inductance L1.
Further embodiment of this invention, brings concrete parameter into, analyzes the relation of reverse transfer power and dutycycle D.Making U1=310v, U2=12V, n=15, f=50KHz, the inductance value of inductance L1 takes 200uH, 300uH and 400uH respectively.Obtain Fig. 5, it is seen from fig 5 that along with the increase of dutycycle D, reverse through-put power is also being gradually increased.And when other conditions are certain, the peak power of reverse transfer is only relevant with the inductance value of inductance L1.Namely the inductance value of inductance L1 is more little, then the maximum power value of reverse transfer is more big.
Claims (10)
1. the reversible transducer structure of an energy storage device and control method, it is characterised in that including: typical two-way full-bridge topologies and typical case's push-pull topology structure, pulse-width modulation PWM, inductive current zero passage detection, the side of high frequency transformer seals in inductance, the former Secondary Voltage secondary voltage more than n times.
2. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: Q1 and Q3 complementation turns on, and Q2 and Q4 complementation turns on, and its ON time is determined by dutycycle, and conducting control mode is determined by the direction of delivering power.
3. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: Q5 and Q6 complementation turns on.
4. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterized in that: U2 side employs push-pull configuration, therefore U2 can be operated in current state, the direction of through-put power can change with control, and through-put power is determined by dutycycle.
5. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: U1 lateral U2 side transmission forward power and U2 lateral U1 side transmission backward power, adopt different control modes.
6. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: during the lateral U2 side transmission forward power of U1, through-put power increases with the increase of dutycycle, and becomes quadratic relationship.
7. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: during the lateral U1 side transmission backward power of U2, through-put power increases with the increase of dutycycle, and becomes quadratic relationship.
8. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: during the lateral U2 side transmission forward power of U1, forward power is, and 0≤D < nU2/2U1.
9. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: during the lateral U1 side transmission backward power of U2, backward power is, and 0≤D < (0.5-nU2/2U1).
10. the reversible transducer structure of a kind of energy storage device and control method according to claim 1, it is characterised in that: there is no power backflow phenomenon, and there is less current stress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216145.4A CN105743355A (en) | 2016-04-11 | 2016-04-11 | Bidirectional converter structure of energy storage device and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610216145.4A CN105743355A (en) | 2016-04-11 | 2016-04-11 | Bidirectional converter structure of energy storage device and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105743355A true CN105743355A (en) | 2016-07-06 |
Family
ID=56253896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610216145.4A Pending CN105743355A (en) | 2016-04-11 | 2016-04-11 | Bidirectional converter structure of energy storage device and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105743355A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504014A (en) * | 2000-11-06 | 2004-06-09 | 艾利森公司 | Method and circuit reducing reverse currents in synchronous rectifier converter circuit |
| CN102237801A (en) * | 2010-12-30 | 2011-11-09 | 保定天威集团有限公司 | Method for controlling bidirectional direct-current converter |
| CN102570831A (en) * | 2012-01-05 | 2012-07-11 | 深圳市高斯宝电气技术有限公司 | Isolated direct current (DC) bidirectional converter |
| CN103683936A (en) * | 2013-12-19 | 2014-03-26 | 陕西科技大学 | Two-way digital DC-DC convertor with wide load range |
| CN104167925A (en) * | 2014-09-01 | 2014-11-26 | 南京理工大学 | Two-way direct-current converter based on phase-shifted full bridge and synchronous rectification |
| CN105356759A (en) * | 2015-12-13 | 2016-02-24 | 魏腾飞 | PWM control method for bidirectional full-bridge DC-DC converter |
| CN105391304A (en) * | 2015-12-20 | 2016-03-09 | 魏腾飞 | PWM control method for bidirectional full-bridge DC-DC converter |
-
2016
- 2016-04-11 CN CN201610216145.4A patent/CN105743355A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504014A (en) * | 2000-11-06 | 2004-06-09 | 艾利森公司 | Method and circuit reducing reverse currents in synchronous rectifier converter circuit |
| CN102237801A (en) * | 2010-12-30 | 2011-11-09 | 保定天威集团有限公司 | Method for controlling bidirectional direct-current converter |
| CN102570831A (en) * | 2012-01-05 | 2012-07-11 | 深圳市高斯宝电气技术有限公司 | Isolated direct current (DC) bidirectional converter |
| CN103683936A (en) * | 2013-12-19 | 2014-03-26 | 陕西科技大学 | Two-way digital DC-DC convertor with wide load range |
| CN104167925A (en) * | 2014-09-01 | 2014-11-26 | 南京理工大学 | Two-way direct-current converter based on phase-shifted full bridge and synchronous rectification |
| CN105356759A (en) * | 2015-12-13 | 2016-02-24 | 魏腾飞 | PWM control method for bidirectional full-bridge DC-DC converter |
| CN105391304A (en) * | 2015-12-20 | 2016-03-09 | 魏腾飞 | PWM control method for bidirectional full-bridge DC-DC converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105356759B (en) | A kind of PWM control method of two-way full-bridge DC-DC converter | |
| CN104506040B (en) | Dual-PWM and phase-shifting control method with the same duty ratio | |
| CN105391304A (en) | PWM control method for bidirectional full-bridge DC-DC converter | |
| CN102969893B (en) | A kind of high gain boost type DC converter | |
| CN209375473U (en) | A kind of circuit of reversed excitation | |
| CN105245113B (en) | The anti-straight-through Sofe Switch of one kind recommends LLC resonant converter | |
| CN105245096A (en) | High-gain three-winding cascade boost converter | |
| CN207218541U (en) | A kind of quasi-resonance soft switch double-transistor flyback DC/DC converters | |
| CN111245078A (en) | Bidirectional vehicle-mounted charger circuit integrated with DC/DC converter | |
| CN206807288U (en) | A kind of three level boost system with one power | |
| CN103731039A (en) | Two-way direct current converter with high conversion efficiency | |
| CN105406724A (en) | Phase-shifting control full-bridge zero-current converter and direct-current switching power source | |
| CN102723869A (en) | Power converter | |
| CN104578806B (en) | Cascade bilateral soft switch DC/DC circuit topology | |
| CN105871219A (en) | Auxiliary pipe voltage clamp type soft switching push-pull direct-current converter | |
| CN111049379A (en) | Charge-discharge type DC-DC conversion circuit and charge-discharge system thereof | |
| CN107204707A (en) | A kind of two-way isolation DC/DC converter and its control method for being used to suppress peak voltage | |
| CN106487259A (en) | A kind of neutral point voltage balance method for three Level Full Bridge DC converters | |
| CN101127482B (en) | Original edge clamp circuit of DC converter | |
| CN105743355A (en) | Bidirectional converter structure of energy storage device and control method | |
| CN104967325A (en) | Winding clamp single tube forward resonant soft-switching DC/DC converter | |
| CN212258468U (en) | Double-end output charging circuit | |
| CN105680688A (en) | Structure and control method of half-bridge bidirectional converter | |
| CN103633844B (en) | A kind of magnetic coupling type high-gain DC/DC changer | |
| CN107086788A (en) | Solar DC converter, method for controlling power supply, air-conditioning electric power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160706 |