CN1174543C - Phase-shift controlled bidirectional DC-DC converter - Google Patents
Phase-shift controlled bidirectional DC-DC converter Download PDFInfo
- Publication number
- CN1174543C CN1174543C CNB02112194XA CN02112194A CN1174543C CN 1174543 C CN1174543 C CN 1174543C CN B02112194X A CNB02112194X A CN B02112194XA CN 02112194 A CN02112194 A CN 02112194A CN 1174543 C CN1174543 C CN 1174543C
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- CN
- China
- Prior art keywords
- circuit
- main circuit
- switching tube
- phase
- converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- 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 present invention relates to a phase-shift controlled bidirectional direct current-direct current converter which is provided with a main circuit and a control circuit, wherein the main circuit comprises four switching tubes M1 to M4, a clamping capacitor Cc1, voltage isolation capacitors Ct1 and Ct2, a filter inductor Lo and an isolation transformer T; the control circuit comprises a phase-shift controlled chip and two PWM control chips which are connected to the output end of the phase-shift controlled chip; the positive end of the error amplifier of each control chip is connected with a duty ratio control signal, and the output end is divided into two ways which are respectively connected with the two input ends of two data selectors; the output signals of the data selectors are divided into two ways; one way of the output signals is inputted to the driver of the main circuit, and the other way of the output signals is inputted to the driver of the main circuit through a negation gate; driving signals outputted by a driving circuit control the switching tube of the main circuit. The present invention tracks the duty ratio used for regulating a PWM and effectively reduces the current stress of the converter and the effective value of a current on the base of the size and the direction of phase-shift controlled transmission power according to voltage amplitude values on both sides. Besides, the converter can realize soft switching operation and improve efficiency.
Description
Technical field
The present invention relates to phase-shift controlled bidirectional dc-dc converter.
Background technology
In order to reduce the volume and weight of two-way DC-DC converter, must improve switching frequency.And the increase that the raising of switching frequency must bring switching loss in traditional converter.In these years, the scheme that addresses this problem has appearred.Wherein some adopts resonance, quasi-resonance or the multi resonant technology of shaking, but the electric current and voltage stress of converter is higher, and variable frequency control has increased the difficulty of Design of Filter; Some adds energy snubber and absorbs circuit or active clamp circuit, but has increased the complexity of converter and control; Also some adopts the full-bridge phase-shift technology, such transformer configuration is simple, components and parts are few, weak point is when a side voltage deviation equilibrium valve, the current peak and the effective value of converter increase greatly, certainly will increase the exchange of reactive power between input and the output,, increase loss so increase the current stress of power device, magnetic element.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structurely, can reduce the peak value of electric current and the phase-shift controlled bidirectional dc-dc converter of effective value.
Phase-shift controlled bidirectional dc-dc converter of the present invention has main circuit and control circuit two parts, and main circuit comprises four switching tube M
1～M
4, clamp capacitor Cc1, two capacitance Ct1, Ct2, filter inductance L
0With isolating transformer T, the former limit of isolating transformer T is connected across the switching tube M that is in series after being connected in series the first capacitance Ct1
1, M
2One of them switching tube M
2Two ends, these two switching tube M
1, M
2Series circuit and DC power supply V
1Parallel connection, the secondary of isolating transformer T are connected in series behind the second capacitance Ct2 and switching tube M
4Parallel connection, and respectively with switching tube M
3Series circuit, filter inductance L with clamp capacitor Cc1
0With active load V
2Series circuit be in parallel; Control circuit comprises that two inputs connect the phase shift control chip of given power signal and feedback power signal respectively, the output signal of phase shift control chip divides two the tunnel, respectively with first, the synchronous end of the second two pwm chips links to each other, the positive termination duty cycle control signal of the error amplifier of each pwm chip, output divides two the tunnel, connect first respectively, the input of second data selector, first, the public input of the second two data selectors is just connecing respectively, reverse control signal, the output signal of data selector divides two the tunnel, one road input main circuit driver, another road is through not gate input main circuit driver, said main circuit driver comprises the rising edge delay circuit, buffer circuit and drive circuit, the signal of input main circuit driver is defeated by buffer circuit through the rising edge delay circuit, the input of the output termination drive circuit of buffer circuit, the drive signal of No. four drive circuits output is defeated by main circuit switch pipe M respectively
1～M
4
Phase-shift controlled bidirectional dc-dc converter of the present invention is on the basis of phase shift control transmission watt level and direction, according to the both sides voltage magnitude, follow the tracks of the duty ratio of regulating PWM, can effectively reduce the current stress and the current effective value of converter, and converter can be realized soft switch work, thereby can raise the efficiency.
Description of drawings
Fig. 1 is a main circuit of the present invention;
Fig. 2 is a control circuit block diagram of the present invention;
Fig. 3 is a circuit theory waveform of the present invention.
Embodiment
The phase-shift controlled bidirectional dc-dc converter of invention has main circuit and control circuit two parts, and main circuit is with reference to Fig. 1, and it comprises four switching tube M
1～M
4, clamp capacitor Cc1, capacitance Ct1, Ct2, filter inductance L
0With isolating transformer T, switching tube can be power field effect transistor, power bipolar transistor or insulated door gated transistors or other controlled switching device, what legend adopted is power field effect transistor, is connected across the switching tube M that is in series behind the former limit serial connection capacitance Ct1 of isolating transformer T
1, M
2One of them switching tube M
2Two ends, these two switching tube M
1, M
2Series circuit and DC power supply V
1Parallel connection, L among the figure
1It is the leakage inductance of isolating transformer.Behind the secondary of the isolating transformer T serial connection capacitance Ct2 with switching tube M
4, switching tube M
3Series circuit, filter inductance L with clamp capacitor Cc1
0With active load V
2Series circuit be in parallel; Control circuit as shown in Figure 2, it comprises that two inputs connect the phase shift control chip 1 of given power signal A and feedback power signal B respectively, the output signal of phase shift control chip divides two the tunnel, link to each other with the synchronous end of first, second two pwm chips 2 respectively, the positive termination duty cycle control signal of the error amplifier of each pwm chip D, D=NV
2/ V
1N is the transformer number of turn, output divides two the tunnel, connect first respectively, the input of second data selector 3, first, the public input of the second two data selectors is just connecing respectively, reverse control signal E, the output signal of data selector divides two the tunnel, one road input main circuit driver 8, another road is through not gate 4 input main circuit drivers 8, said main circuit driver 8 comprises rising edge delay circuit 5, buffer circuit 6 and drive circuit 7, and the signal of input main circuit driver is defeated by buffer circuit 6 through rising edge delay circuit 5, the input of the output termination drive circuit 7 of buffer circuit, the drive signal V of No. four drive circuits output
G1, V
G2, V
G3, V
G4Be defeated by main circuit switch pipe M respectively
1～M
4Gate pole.
Here, the phase shift control chip can adopt UC3875, and pwm chip can be used UC3525A.
The course of work of converter is with reference to Fig. 3, and figure (a)～figure (d) is switching tube M
1～M
4Gate electrode drive signals, figure (e) is a voltage waveform between main circuit a, b contact, figure (f) is the voltage waveform between main circuit c, d contact, figure (g) is converter leakage inductance L
1Voltage waveform, figure (h) be L
1Current waveform.
In the converter work, four switching tube M
1, M
2, M
3And M
4Switching frequency identical, M wherein
1And M
3Drive controlling keep identical duty ratio D, M
2With M
1Drive controlling be complimentary fashion, M
4With M
3Drive controlling be complimentary fashion.By control M
1And M
3The phase relation of drive signal reaches two DC source V of control
1And V
2Between the size and Orientation of power transfer.Work as V
1Or/and V
2During the voltage deviation equilibrium valve, at switching tube M
1And M
3Time period of conducting simultaneously (figure h, t2～t3 time period) and switching tube M
2And M
4The time period of conducting simultaneously (figure h, t4～t5 time period) converter current remains unchanged, and can reduce current stress like this, reduces the loss of current effective value and converter.
The switching tube M of transformer the same side
1(or M
3) and switching tube M
2(or M
4) carry out in the switch handoff procedure, because transformer leakage inductance L
1Existence, switching tube such as M therein
1Have no progeny in the pass, the electric current in the leakage inductance will be to another switching tube M of homonymy
2Two ends and the equivalent capacity discharge that connects, latter M afterwards
2Will be by open-minded under the no-voltage situation.Like this, converter all can be realized soft switch work in two-way operation.After arbitrary switching tube was turned off, its both end voltage all was clamped on the fixed voltage, high voltage stress and vibration can not occur.
Claims (1)
1. phase-shift controlled bidirectional dc-DC converter is characterized in that having main circuit and control circuit two parts, and main circuit comprises four switching tube (M
1～M
4), clamp capacitor (Cc1), two capacitances (Ct1, Ct2), filter inductance (L
0) and isolating transformer (T), the former limit of isolating transformer (T) is connected across first, second switching tube (M that is in series after being connected in series first capacitance (Ct1)
1, M
2) the two ends of one of them switching tube (M2), this first, second switching tube (M
1, M
2) series circuit and DC power supply (V
1) parallel connection, the secondary of isolating transformer (T) is connected in series second capacitance (Ct2) back and the 4th switching tube (M
4) parallel connection, and respectively with the 3rd switching tube (M
3) and series circuit, the filter inductance (L of clamp capacitor (Cc1)
0) and active load (V
2) series circuit be in parallel; Control circuit comprises that two inputs connect the phase shift control chip (1) of given power signal and feedback power signal respectively, the output signal of phase shift control chip divides two the tunnel, respectively with first, the synchronous end of the second two pwm chips (2) links to each other, the positive termination duty cycle control signal of the error amplifier of each pwm chip, output divides two the tunnel, connect first respectively, the input of second data selector (3), first, the public input of the second two data selectors is just connecing respectively, reverse control signal, the output signal of data selector divides two the tunnel, one road input main circuit driver (8), another road is through not gate (4) input main circuit driver (8), said main circuit driver (8) comprises rising edge delay circuit (5), buffer circuit (6) and drive circuit (7), the signal of input main circuit driver is defeated by buffer circuit (6) through rising edge delay circuit (5), the input of the output termination drive circuit (7) of buffer circuit, the drive signal of No. four drive circuits output is defeated by four switching tube (M of main circuit respectively
1～M
4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02112194XA CN1174543C (en) | 2002-06-21 | 2002-06-21 | Phase-shift controlled bidirectional DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02112194XA CN1174543C (en) | 2002-06-21 | 2002-06-21 | Phase-shift controlled bidirectional DC-DC converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1385954A CN1385954A (en) | 2002-12-18 |
| CN1174543C true CN1174543C (en) | 2004-11-03 |
Family
ID=4741932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02112194XA Expired - Fee Related CN1174543C (en) | 2002-06-21 | 2002-06-21 | Phase-shift controlled bidirectional DC-DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1174543C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538255B (en) * | 2003-10-24 | 2010-06-09 | 中兴通讯股份有限公司 | Multichannel switch control device |
| DE102006009506B4 (en) * | 2006-02-27 | 2010-09-23 | Phoenix Contact Gmbh & Co. Kg | Bidirectional, galvanically isolated transmission channel |
| CN100424976C (en) * | 2006-07-17 | 2008-10-08 | 南京航空航天大学 | Two way DC converter controlled by one-end voltage stable, one-end current stable phase shift plus PWM and its control method |
| US7598895B1 (en) * | 2008-04-01 | 2009-10-06 | Silicon Laboratories, Inc. | System and method of altering a PWM carrier power spectrum |
| CN104734474B (en) * | 2013-12-23 | 2017-07-18 | 立锜科技股份有限公司 | Switched power supply and its control circuit and control method |
| CN104242664B (en) * | 2014-09-25 | 2017-02-01 | 西安交通大学 | Modulation method of three-phase isolation type bidirectional direct-current converter under double PWM (pulse width modulation) |
| CN113708646B (en) * | 2021-09-28 | 2023-11-21 | 西南交通大学 | Phase shift sequence control method of bidirectional half-bridge three-level DC-DC converter |
-
2002
- 2002-06-21 CN CNB02112194XA patent/CN1174543C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1385954A (en) | 2002-12-18 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041103 Termination date: 20110621 |