CN104836561A - Soft turn-off technology with load voltage being adjusted - Google Patents
Soft turn-off technology with load voltage being adjusted Download PDFInfo
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- CN104836561A CN104836561A CN201510266003.4A CN201510266003A CN104836561A CN 104836561 A CN104836561 A CN 104836561A CN 201510266003 A CN201510266003 A CN 201510266003A CN 104836561 A CN104836561 A CN 104836561A
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- power tube
- control circuit
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Abstract
The invention discloses a soft turn-off technology with a load voltage being adjusted. After single-phase AC rectification, a control circuit controls a power tube, and a diode is in parallel connection with two ends of a load. The power tube is in parallel connection with a buffering circuit. The control circuit comprises a synchronous circuit, a voltage control circuit, and a drive circuit. The control circuit also can be provided with a detection circuit, or a working mode circuit. The voltage control circuit can adjust the load voltage. After the full-voltage start of a load, the voltage is converted into a normal working voltage. A pulse with the corresponding duty ratio is generated, and is synchronous with an AC zero potential signal, thereby controlling the soft turning-off of the power tube.
Description
Technical field
The present invention relates to a kind of device of load Regulation Control.
Background technology
During for the employing of some pressure regulation loads at present silicon-controlled voltage regulation, can not instantaneously turn off, silicon-controlled voltage regulation is not too applicable to inductive load, and controllable silicon drives complicated.
Summary of the invention
It is easy to the object of the invention is to load pressure regulation, and power tube adopts soft switching control technology, and has full voltage starting function.Be well suited for inductive load, such as elevator internal contracting brake.
For addressing these problems, technical scheme provided by the invention is:
Single-phase alternating current is by after rectifying device rectification, and power positive end connects a pin of load, and another pin of load connects 2 pin of power tube, and power tube 3 pin connects power supply negative terminal, or connects power supply negative terminal by detecting resistance; Control circuit controls power tube, and power tube can be IGBT, VMOSFET, triode etc.A load two ends diode in parallel, power tube 2 and 3 pin is parallel with buffer circuit.As Fig. 1.
The buffer circuit of power tube has three kinds of forms: C type; Or RC type; Or RCD type.As Fig. 2.
Control circuit has following embodiment:
ainclude synchronous circuit, voltage control circuit, and drive circuit;
bexcept A, also comprise testing circuit circuit;
cexcept A, also comprise operating mode circuit, operating mode circuit can select continuous firing pattern or discontinuous pattern;
dexcept B, also comprise operating mode circuit.
Synchronous circuit: by sampling rectifying device AC or DC voltage, obtains alternating current zero potential signal.
Voltage control circuit: energy regulating load voltage; After load full voltage starting, be converted to normal working voltage.It produces the pulse of corresponding duty ratio, and this pulse is synchronous with alternating current zero potential signal, controls power tube soft switching.It has plug-in or without plug-in.
Drive circuit: can driving power pipe.
Testing circuit: can coherent signal be detected.
accompanying drawing explanation:
Fig. 1 is the structure of main circuit, and Fig. 2 is three kinds of forms of the buffer circuit of power tube.
Embodiment
Below in conjunction with specific embodiment, such scheme is described further, should be understood that these embodiments are for illustration of the present invention instead of restriction scope.The implementation condition adopted in the present embodiment can do further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
Power positive end connects a pin of load, and another pin of load connects a pin of IGBT, and another pin of power tube connects power supply negative terminal, control circuit control IGBT, and a load two ends diode in parallel, power tube is parallel with electric capacity C.
Control circuit: comprise synchronous circuit, voltage control circuit, drive circuit, testing circuit.
Above-mentioned example, only for design of the present invention and feature are described, its object is to be to person skilled in the art can be understood content of the present invention and implement according to this, can not limiting the scope of the invention with this.All equivalent transformations of doing according to Spirit Essence of the present invention or modification, all should be encompassed within the scope of the invention.
Claims (4)
1. a tunable load voltage soft switching technology, is characterized in that:
Single-phase alternating current is by after rectification, and power positive end connects a pin of load, and 2 pin of load connect a pin of power tube, and power tube 3 pin connects power supply negative terminal, or connects power supply negative terminal by detecting resistance; Control circuit controls power tube, a load two ends diode in parallel, and power tube 2 and 3 pin is parallel with buffer circuit;
Control circuit has following implementation to be:
Include synchronous circuit, voltage control circuit, and drive circuit;
Or also comprise testing circuit circuit;
Or also comprise operating mode circuit;
Or also comprise testing circuit circuit and operating mode circuit.
2., according to claim 1, it is characterized in that synchronous circuit can obtain alternating current zero potential signal.
3., according to claim 1, it is characterized in that voltage control circuit energy regulating load voltage; After load full voltage starting, be converted to normal working voltage; It produces the pulse of corresponding duty ratio, and this pulse is synchronous with synchronizing signal, controls power tube soft switching, and it has plug-in or without plug-in.
4., according to claim 1, it is characterized in that testing circuit can detect coherent signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510266003.4A CN104836561A (en) | 2015-04-14 | 2015-05-24 | Soft turn-off technology with load voltage being adjusted |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015101734007 | 2015-04-14 | ||
| CN201510173400 | 2015-04-14 | ||
| CN201510266003.4A CN104836561A (en) | 2015-04-14 | 2015-05-24 | Soft turn-off technology with load voltage being adjusted |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104836561A true CN104836561A (en) | 2015-08-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510266003.4A Pending CN104836561A (en) | 2015-04-14 | 2015-05-24 | Soft turn-off technology with load voltage being adjusted |
Country Status (1)
| Country | Link |
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| CN (1) | CN104836561A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6369688B1 (en) * | 1999-06-15 | 2002-04-09 | Matsushita Electric Works, Ltd. | Automatic gang switch having a heat ray sensor |
| CN1598989A (en) * | 2004-07-30 | 2005-03-23 | 东南大学 | Detecting device of mixed power electronic circuit-breaker |
| CN101478276A (en) * | 2009-01-22 | 2009-07-08 | 金莱克电气股份有限公司 | Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method |
| CN101854120A (en) * | 2009-04-01 | 2010-10-06 | 艾默龙电子科技（嘉兴）有限公司 | High-efficiency multifunctional flyback converter |
| CN101882860A (en) * | 2010-06-23 | 2010-11-10 | 山东大学威海分校 | Novel insulated gate bipolar translator (IGBT) drive and protection circuit |
| CN102664528A (en) * | 2012-04-23 | 2012-09-12 | 承德承信自动化工程有限公司 | Switch power supply |
| CN102904431A (en) * | 2012-10-15 | 2013-01-30 | 深圳市明微电子股份有限公司 | Switching power supply and constant voltage output controller thereof |
| CN202840938U (en) * | 2012-08-27 | 2013-03-27 | 上海占空比电子科技有限公司 | Constant current control circuit capable of power factor correction |
-
2015
- 2015-05-24 CN CN201510266003.4A patent/CN104836561A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6369688B1 (en) * | 1999-06-15 | 2002-04-09 | Matsushita Electric Works, Ltd. | Automatic gang switch having a heat ray sensor |
| CN1598989A (en) * | 2004-07-30 | 2005-03-23 | 东南大学 | Detecting device of mixed power electronic circuit-breaker |
| CN101478276A (en) * | 2009-01-22 | 2009-07-08 | 金莱克电气股份有限公司 | Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method |
| CN101854120A (en) * | 2009-04-01 | 2010-10-06 | 艾默龙电子科技（嘉兴）有限公司 | High-efficiency multifunctional flyback converter |
| CN101882860A (en) * | 2010-06-23 | 2010-11-10 | 山东大学威海分校 | Novel insulated gate bipolar translator (IGBT) drive and protection circuit |
| CN102664528A (en) * | 2012-04-23 | 2012-09-12 | 承德承信自动化工程有限公司 | Switch power supply |
| CN202840938U (en) * | 2012-08-27 | 2013-03-27 | 上海占空比电子科技有限公司 | Constant current control circuit capable of power factor correction |
| CN102904431A (en) * | 2012-10-15 | 2013-01-30 | 深圳市明微电子股份有限公司 | Switching power supply and constant voltage output controller thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150812 |
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| WD01 | Invention patent application deemed withdrawn after publication |