CN102237801A - Method for controlling bidirectional direct-current converter - Google Patents
Method for controlling bidirectional direct-current converter Download PDFInfo
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- CN102237801A CN102237801A CN2011100972974A CN201110097297A CN102237801A CN 102237801 A CN102237801 A CN 102237801A CN 2011100972974 A CN2011100972974 A CN 2011100972974A CN 201110097297 A CN201110097297 A CN 201110097297A CN 102237801 A CN102237801 A CN 102237801A
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Abstract
The invention relates to a method for controlling a bidirectional direct-current converter, which is used for solving the problem that two sets of control circuits are used in a control circuit of a bidirectional push-pull full-bridge direct-current converter and belongs to the technical field of switching power supplies. In the technical scheme provided by the invention, the bidirectional direct-current converter works under reduced voltage in a full-bridge working mode, full-wave rectification is adopted for a secondary side, four switch tubes on a full-bridge side are required to be controlled in the working state, and rectification of a diode which is reversely connected in parallel with the switch tube is only needed for the secondary side; the bidirectional direct-current converter works under raised voltage in the working mode of a push-pull circuit, two switch tubes on the push-pull side are required to be controlled, and the rectification of the diode which is reversely connected in parallel with the switch tube is only required for the secondary side likewise; and during the control of the push-pull full-bridge bidirectional DC/DC (Direct Current to Direct Current) converter, one set of chips is adopted, and auxiliary chips such as an alternative analog switch, a voltage comparer, an or door and the like are used for controlling, so that bidirectional flow of energy is realized. Due to the adoption of the control method, the quantity of control chips is reduced, the cost is saved, the size and the weight of the control circuit are reduced, and the overall efficiency of the converter is increased.
Description
Technical field:
The present invention relates to a kind of control method of two-way DC converter, solve the problems of using two cover control circuits in the two-way control circuit of recommending full-bridge direct current converter, belong to the switch power technology field.
Background technology:
Two-way DC converter has been widely used in occasions such as AC/DC uniterruptible power system, solar power supply system, electric automobile, fuel cell system, multiport mixed power supply system, amplidyne and elevator.Its application all reduces at aspects such as volume and weights to some extent than it unidirectional DC converter, but generally all be to use two cover control chips to control separately in control, the optimization of two-way DC converter control has become the emphasis of present two-way DC converter research.In the control of general two-way DC/DC converter, all be to select two cover control chips for use, forward and reverse control all are the independent control algolithms of a cover.Contrast unidirectional DC/DC converter, though only make like this of the two-way flow that can realize energy once the cover main circuit, control algolithm is loaded down with trivial details relatively, and control circuit can not obtain its corresponding simplified.
Summary of the invention:
The object of the invention provides a kind of control method of two-way DC converter, only selects a cover control chip for use, has simplified control circuit, the volume and weight of mitigation system significantly, thus save cost, solve the problems referred to above that exist in the background technology.
Technical scheme of the present invention is: a kind of control method of two-way DC converter, the two-way DC converter step-down is operated in the mode of operation of full-bridge, secondary adopts full-wave rectification, this operating state need be controlled four switching tubes of full-bridge side, and secondary only needs the antiparallel diode rectification of switching tube to get final product; Boosting is operated in the mode of operation of push-pull circuit, needs this moment control to recommend two switching tubes of side, and secondary is only to need the antiparallel diode of switching tube to carry out rectification to get final product equally.
When two-way DC converter was operated in the mode of operation of step-down, promptly the mode of operation of full-bridge adopted bridge Phase shifted PWM Controlled, selects for use UC3875 to realize.
When two-way DC converter is operated in the mode of operation of boosting, the mode of operation that promptly adds the push-pull circuit of boost inductance, require two switching tubes that a common ON time is arranged this moment, the signal that utilizes UC3875 to produce this moment has the characteristics of phase shift, the two paths of signals that phase shift is arranged that makes UC3875 output through one or, the drive signal that obtains can satisfy the common conducting of two switching tubes, realizes the requirement of control.
It is a kind of of isolation type bidirectional DC/DC converter that the present invention recommends the two-way DC/DC converter of full-bridge, and it is to be combined by push-pull circuit and full-bridge circuit, also can regard the input full-bridge as, and the circuit topology of output full-wave rectification develops.
The invention has the beneficial effects as follows: in the control of recommending the two-way DC/DC converter of full-bridge, select UC3875 one cover chip for use, select the alternative analog switch again for use, voltage comparator, or companion chip such as door controls, and realizes the two-way flow of its energy.Such control method has reduced control chip, saves cost, and the control circuit volume and weight is reduced, and has improved the whole efficiency of converter.
Description of drawings:
Fig. 1 recommends the two-way DC/DC converter circuit of full-bridge figure;
The schematic diagram that Fig. 2 control signal produces;
The The general frame of Fig. 3 system control;
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
In an embodiment, a kind of control method of two-way DC converter, the two-way DC converter step-down is operated in the mode of operation of full-bridge, and secondary adopts full-wave rectification, this operating state need be controlled four switching tubes of full-bridge side, and secondary only needs the antiparallel diode rectification of switching tube to get final product; Boosting is operated in the mode of operation of push-pull circuit, needs this moment control to recommend two switching tubes of side, and secondary is only to need the antiparallel diode of switching tube to carry out rectification to get final product equally.
When two-way DC converter was operated in the mode of operation of step-down, promptly the mode of operation of full-bridge adopted bridge Phase shifted PWM Controlled, selects for use UC3875 to realize.
When two-way DC converter is operated in the mode of operation of boosting, the mode of operation that promptly adds the push-pull circuit of boost inductance, require two switching tubes that a common ON time is arranged this moment, the signal that utilizes UC3875 to produce this moment has the characteristics of phase shift, the two paths of signals that phase shift is arranged that makes UC3875 output through one or, the drive signal that obtains can satisfy the common conducting of two switching tubes, realizes the requirement of control.
It is a kind of of isolation type bidirectional DC/DC converter that the present invention recommends the two-way DC/DC converter of full-bridge, and it is to be combined by push-pull circuit and full-bridge circuit, also can regard the input full-bridge as, and the circuit topology of output full-wave rectification develops.
1, the control strategy of energy two-way flow
It is tactful as follows that the energy two-way flow is controlled: a controlled tr tube to the full-bridge side carries out gating at the beginning, and secondary carries out rectification by the antiparallel diode of controlled tr tube, and circuit working is in the forward operating state.Output voltage is detected, compare with a set point (output voltage values of requirement), when surpassing this set point, by gating signal, control circuit carries out gating to the controlled tr tube of recommending side, makes its conducting.The full-bridge side is carried out rectification by the antiparallel diode of controlled tr tube, and circuit working is at the reverse operation state.
2, the method for control signal gating
The method of its control signal gating is: output voltage is detected, compare (reference voltage can be the size of the output voltage of requirement setting with regard to a setting voltage value) by voltage comparator and reference voltage then.When output voltage during greater than reference voltage, voltage comparator is output as high level, this moment, alternative analog switch gating passage 1(feedback signal was the high-pressure side, the correspondence mode of operation of boosting), same reason, this moment, multichannel alternative analog switch gating process or signal were behind the door delivered to the boosted switch pipe, the mode of operation that circuit working is boosting after this pwm signal generation.Otherwise when output voltage during less than reference voltage, voltage comparator is output as low level, this moment the alternative analog switch then gating passage 2(feedback signal be low-pressure side, corresponding step-down mode of operation).Multichannel alternative analog switch is four road signals with time delay of the direct output of gating UC3875 then, and this pwm signal is delivered to the step-down switching pipe after producing, and this moment, circuit then was operated in the step-down mode of operation.
Claims (4)
1. the control method of a two-way DC converter, it is characterized in that the two-way DC converter step-down is operated in the mode of operation of full-bridge, secondary adopts full-wave rectification, and this operating state need be controlled four switching tubes of full-bridge side, and secondary only needs the antiparallel diode rectification of switching tube to get final product; Boosting is operated in the mode of operation of push-pull circuit, needs this moment control to recommend two switching tubes of side, and secondary is only to need the antiparallel diode of switching tube to carry out rectification to get final product equally.
2. according to the control method of the described two-way DC converter of claim 1, it is characterized in that it is a kind of of isolation type bidirectional DC/DC converter that the present invention recommends the two-way DC/DC converter of full-bridge, it is to be combined by push-pull circuit and full-bridge circuit, also can regard the input full-bridge as, the circuit topology of output full-wave rectification develops.
3. according to the control method of claim 1 or 2 described two-way DC converters, when it is characterized in that two-way DC converter is operated in the mode of operation of step-down, promptly the mode of operation of full-bridge adopts bridge Phase shifted PWM Controlled, selects for use UC3875 to realize.
4. according to the control method of claim 1 or 2 described two-way DC converters, when it is characterized in that two-way DC converter is operated in the mode of operation of boosting, the mode of operation that promptly adds the push-pull circuit of boost inductance, require two switching tubes that a common ON time is arranged this moment, the signal that utilizes UC3875 to produce this moment has the characteristics of phase shift, the two paths of signals that phase shift is arranged that makes UC3875 output through one or, the drive signal that obtains can satisfy the common conducting of two switching tubes, realizes the requirement of control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100972974A CN102237801A (en) | 2010-12-30 | 2011-04-19 | Method for controlling bidirectional direct-current converter |
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| CN201010613406 | 2010-12-30 | ||
| CN201010613406.9 | 2010-12-30 | ||
| CN2011100972974A CN102237801A (en) | 2010-12-30 | 2011-04-19 | Method for controlling bidirectional direct-current converter |
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| CN102237801A true CN102237801A (en) | 2011-11-09 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868198A (en) * | 2012-10-12 | 2013-01-09 | 广东易事特电源股份有限公司 | Uninterrupted power supply (UPS) reserve power supply boosting and charging reuse circuit |
| CN103219764A (en) * | 2013-04-03 | 2013-07-24 | 湖南大学 | Vehicular charging system for electric automobile, and charging control method thereof |
| CN104135158A (en) * | 2014-07-10 | 2014-11-05 | 西南交通大学 | Disperse phase-shifting angle control method of phase-shifting full-bridge DC-DC (Direct Current-Direct Current) converter, and device of control method |
| CN105743355A (en) * | 2016-04-11 | 2016-07-06 | 魏腾飞 | Bidirectional converter structure of energy storage device and control method |
| CN106505868A (en) * | 2016-12-30 | 2017-03-15 | 广东工业大学 | Two-way DC/DC driving pulses modulator approach and device based on DSP |
| CN108712081A (en) * | 2018-06-04 | 2018-10-26 | 浙江大学 | The control method of constant voltage gain isolation type bidirectional full-bridge DC/DC converters |
| CN109617409A (en) * | 2018-12-27 | 2019-04-12 | 哈尔滨工业大学（深圳） | Two-way DC converter control circuit and its control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101667784A (en) * | 2008-09-02 | 2010-03-10 | 日立计算机机器株式会社 | Bidirectional dc-dc converter and control method thereof |
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2011
- 2011-04-19 CN CN2011100972974A patent/CN102237801A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101667784A (en) * | 2008-09-02 | 2010-03-10 | 日立计算机机器株式会社 | Bidirectional dc-dc converter and control method thereof |
Non-Patent Citations (2)
| Title |
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| 石宏伟: "基于UC3875全桥移相开关电源的设计", 《广西轻工业》 * |
| 马兰，钱荔，肖岚: "电流型推挽全桥双向变换器的研究", 《电力电子技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868198A (en) * | 2012-10-12 | 2013-01-09 | 广东易事特电源股份有限公司 | Uninterrupted power supply (UPS) reserve power supply boosting and charging reuse circuit |
| CN103219764A (en) * | 2013-04-03 | 2013-07-24 | 湖南大学 | Vehicular charging system for electric automobile, and charging control method thereof |
| CN104135158A (en) * | 2014-07-10 | 2014-11-05 | 西南交通大学 | Disperse phase-shifting angle control method of phase-shifting full-bridge DC-DC (Direct Current-Direct Current) converter, and device of control method |
| CN105743355A (en) * | 2016-04-11 | 2016-07-06 | 魏腾飞 | Bidirectional converter structure of energy storage device and control method |
| CN106505868A (en) * | 2016-12-30 | 2017-03-15 | 广东工业大学 | Two-way DC/DC driving pulses modulator approach and device based on DSP |
| CN108712081A (en) * | 2018-06-04 | 2018-10-26 | 浙江大学 | The control method of constant voltage gain isolation type bidirectional full-bridge DC/DC converters |
| CN109617409A (en) * | 2018-12-27 | 2019-04-12 | 哈尔滨工业大学（深圳） | Two-way DC converter control circuit and its control method |
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Application publication date: 20111109 |