CN203233391U - Strong drive circuit with short-circuit protection function - Google Patents
Strong drive circuit with short-circuit protection function Download PDFInfo
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- CN203233391U CN203233391U CN 201320194573 CN201320194573U CN203233391U CN 203233391 U CN203233391 U CN 203233391U CN 201320194573 CN201320194573 CN 201320194573 CN 201320194573 U CN201320194573 U CN 201320194573U CN 203233391 U CN203233391 U CN 203233391U
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Abstract
The utility model discloses a strong drive circuit with a short-circuit protection function. The strong drive circuit comprises a drive circuit, a control circuit, an amplifying circuit and a detection circuit. The drive circuit comprises a first resistor, a second resistor, and an optoelectronic coupler; a first terminal of the first resistor is a voltage input terminal, a second terminal of the first resistor is connected with a first terminal of the optoelectronic coupler and a second terminal of the optoelectronic coupler is connected with an external circuit; and a first terminal of the second resistor is connected to the ground, and a second terminal of the second resistor is connected with a third terminal of the optoelectronic coupler. The strong drive circuit with the short-circuit protection function is simple in structure, low in cost, good in reliability and high in security and is provided with a short-circuit protection function.
Description
Technical field
The utility model relates to a kind of drive circuit, relates in particular to a kind of strong drive circuit with short-circuit protection function.
Background technology
Insulated gate bipolar transistor is by the device that is composited of ambipolar power transistor and metal-oxide half field effect transistor, so it has both common a bit, i.e. multiple advantages such as input impedance height, speed is fast, switching frequency is high, Heat stability is good, simple, the single ampacity of drive circuit are big, blocking voltage height.Therefore, in present power electronic technology, obtain more and more widely application.Yet the drive circuit of insulated gate bipolar transistor is the interface between power electronics main circuit and the control circuit, is the important step of power electronic equipment, and the performance of whole device is had very big influence.Adopt well behaved drive circuit, can make power electronic device be operated in comparatively ideal on off state, shorten switching time, reduce switching loss, operational efficiency, reliability, the fail safe of installing had important meaning.But in switching power unit, because it is operated under the condition of high pressure, big electric current, make insulated gate bipolar transistor damage easily.
The utility model content
The purpose of this utility model with regard to be to provide in order to address the above problem a kind of simple in structure, cost is low, have the strong drive circuit of short-circuit protection function.
In order to achieve the above object, the utility model has adopted following technical scheme:
A kind of strong drive circuit with short-circuit protection function; comprise drive circuit, control circuit, amplifying circuit and testing circuit; described drive circuit comprises first resistance, second resistance, photoelectrical coupler; first end of described first resistance is that second end of voltage input end, described first resistance is connected with first end of described photoelectrical coupler; second end of described photoelectrical coupler is connected with external circuits; the first end ground connection of described second resistance, second end of described second resistance is connected with the 3rd end of described photoelectrical coupler.
Particularly, described control circuit comprises the 3rd resistance, the 4th resistance, the 5th resistance, first electric capacity, second electric capacity, the 3rd electric capacity, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 13 resistance, the 14 resistance, first diode, first voltage stabilizing didoe, second voltage stabilizing didoe, the 7th triode and the 8th triode, first end of described the 4th resistance is connected with the 4th end of described photoelectrical coupler, first end of described the 5th resistance is connected with the five terminal of described photoelectrical coupler, second end of described the 5th resistance, first end of described second electric capacity, first end of described the 8th resistance, first end of described the 9th resistance, first end of described the 3rd electric capacity and first end of described the 13 resistance are connected back ground connection, second end of described the 9th resistance is connected with the positive pole of described first diode and the emitter of described the 7th triode respectively, the negative pole of described first diode is connected with first end of described the tenth resistance, second end of described the tenth resistance respectively with second end of described the 3rd electric capacity, the positive pole of described second voltage stabilizing didoe, first end of described the 11 resistance, second end of described the 13 resistance is connected with the emitter of described the 8th triode, the base stage of described the 7th triode is connected with second end of described second electric capacity and second end of described the 8th resistance respectively, the collector electrode of described the 7th triode is connected with first end of described the 3rd resistance and second end of described the 11 resistance respectively, described the 3rd resistance first end is voltage input end, second end of described the 3rd resistance is connected with first end of described first electric capacity, second end of described the 4th resistance is connected with second end of described first electric capacity, the negative pole of described second voltage stabilizing didoe is connected with the negative pole of described first voltage stabilizing didoe, and the positive pole of described first voltage stabilizing didoe is connected with first end of described the 14 resistance and the base stage of described the 8th triode respectively.
Particularly, described amplifying circuit comprises first triode, second triode, the 3rd triode, the 4th triode and the 5th triode, the base stage of described first triode is connected with second end of described the 4th resistance, the collector electrode of described first triode is connected with the base stage of described second triode and the base stage of described the 3rd triode respectively, the collector electrode of described second triode is connected with second end of described the 11 resistance, the emitter of described second triode respectively with the emitter of described the 3rd triode, the base stage of described the 4th triode is connected with the base stage of described the 5th triode, the collector electrode of described the 3rd triode is connected with second end of described the 5th resistance, the collector electrode of described the 4th triode is connected with second end of described the 11 resistance, the emitter of described the 4th triode is connected with second end of described the 14 resistance and the emitter of described the 5th triode respectively, and the collector electrode of described the 5th triode is connected with second end of described the 5th resistance.
Particularly, described testing circuit comprises second diode, the 6th resistance, the 7th resistance, the 12 resistance and the 6th triode, the negative pole of described second diode be connected with external circuits again after the collector electrode of described the 8th triode is connected, the positive pole of described second diode is connected with first end of described the 12 resistance, second end of described the 12 resistance respectively with first end of described the 6th resistance, the collector electrode of described the 6th triode is connected with the base stage of described the 7th triode, second end of described the 6th resistance is connected with first end of described the 7th resistance and second end of described the 11 resistance respectively, second end of described the 7th resistance is connected with the collector electrode of described first triode, the base stage of described the 6th triode is connected with second end of described the 4th resistance, and the emitter of described the 6th triode is connected with second end of described the 5th resistance.
The beneficial effects of the utility model are:
The utlity model has short-circuit protection function strong drive circuit simple in structure, cost is low, good reliability, safe, and has short-circuit protection function.
Description of drawings
Fig. 1 is the circuit diagram that the utlity model has the strong drive circuit of short-circuit protection function.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1; the utlity model has the strong drive circuit of short-circuit protection function; comprise drive circuit, control circuit, amplifying circuit and testing circuit; drive circuit comprises first resistance R 1, second resistance R 2, photoelectrical coupler OC; first end of first resistance R 1 is that second end of voltage input end, first resistance R 1 is connected with first end of photoelectrical coupler OC; second end of photoelectrical coupler OC is connected with external circuits; the first end ground connection of second resistance R 2, second end of second resistance R 2 is connected with the 3rd end of photoelectrical coupler OC.
Control circuit comprises the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the 11 resistance R 11, the 13 resistance R 13, the 14 resistance R 14, the first diode D1, the first voltage stabilizing didoe VS1, the second voltage stabilizing didoe VS1, the 7th triode VT7 and the 8th triode VT8, first end of the 4th resistance R 4 is connected with the 4th end of photoelectrical coupler OC, first end of the 5th resistance R 5 is connected with the five terminal of electrical-optical coupler OC, second end of the 5th resistance R 5, first end of second capacitor C 2, first end of the 8th resistance R 8, first end of the 9th resistance R 9, first end of the 3rd capacitor C 3 is connected back ground connection with first end of the 13 resistance R 13, second end of the 9th resistance R 9 is connected with the positive pole of the first diode D1 and the emitter of the 7th triode VT7 respectively, the negative pole of the first diode D1 is connected with first end of the tenth resistance R 10, second end of the tenth resistance R 10 respectively with second end of the 3rd capacitor C 3, the positive pole of the second voltage stabilizing didoe VS2, first end of the 11 resistance R 11, second end of the 13 resistance R 13 is connected with the emitter of the 8th triode VT8, the base stage of the 7th triode VT7 is connected with second end of second capacitor C 2 and second end of the 8th resistance R 8 respectively, the collector electrode of the 7th triode VT7 is connected with first end of the 3rd resistance R 3 and second end of the 11 resistance R 11 respectively, the 3rd resistance R 3 first ends are voltage input end, second end of the 3rd resistance R 3 is connected with first end of first capacitor C 1, second end of the 4th resistance R 4 is connected with second end of first capacitor C 1, the negative pole of the second voltage stabilizing didoe VS2 is connected with the negative pole of the first voltage stabilizing didoe VS1, and the positive pole of the first voltage stabilizing didoe VS1 is connected with first end of the 14 resistance R 14 and the base stage of the 8th triode VT8 respectively.
Amplifying circuit comprises the first triode VT1, the second triode VT2, the 3rd triode VT3, the 4th triode VT4 and the 5th triode VT5, the base stage of the first triode VT1 is connected with second end of the 4th resistance R 4, the collector electrode of the first triode VT1 is connected with the base stage of the second triode VT2 and the base stage of the 3rd triode VT3 respectively, the collector electrode of the second triode VT2 is connected with second end of the 11 resistance R 11, the emitter of the second triode VT2 respectively with the emitter of the 3rd triode VT3, the base stage of the 4th triode VT4 is connected with the base stage of the 5th triode VT5, the collector electrode of the 3rd triode VT3 is connected with second end of the 5th resistance R 5, the collector electrode of the 4th triode VT4 is connected with second end of the 11 resistance R 11, the emitter of the 4th triode VT4 is connected with second end of the 14 resistance R 14 and the emitter of the 5th triode VT5 respectively, and the collector electrode of the 5th triode VT5 is connected with second end of the 5th resistance R 5.
Testing circuit comprises the second diode D2, the 6th resistance R 6, the 7th resistance R 7, the 12 resistance R 12 and the 6th triode VT3, the negative pole of the second diode D2 be connected with external circuits again after the collector electrode of the 8th triode VT8 is connected, the positive pole of the second diode D2 is connected with first end of the 12 resistance R 12, second end of the 12 resistance R 12 respectively with first end of the 6th resistance R 6, the collector electrode of the 6th triode VT6 is connected with the base stage of the 7th triode VT7, second end of the 6th resistance R 6 is connected with first end of the 7th resistance R 7 and second end of the 11 resistance R 11 respectively, second end of the 7th resistance R 7 is connected with the collector electrode of the first triode VT1, the base stage of the 6th triode VT6 is connected with second end of the 4th resistance R 4, and the emitter of the 6th triode VT6 is connected with second end of the 5th resistance R 5.
It is as follows that use the utlity model has the operation principle of strong drive circuit of short-circuit protection function:
This circuit adopts single supply (VCC=24V) power supply, can produce+15V and-driving voltage of 9V, guaranteed the reliable turn-on and turn-off of the 8th triode VT8.Photoelectrical coupler OC realizes the electrical isolation of input/output signal, can make drive circuit and control circuit want strict at current potential and isolate, and suitable frequency applications occasion.Driving main circuit adopts two-way to recommend the way of output, reduced the output impedance of drive circuit effectively, can give the 8th triode VT8 output very strong driving voltage to greatest extent, improve driving force, make it to be suitable for the driving of high-power the 8th triode VT8.This circuit uses collector electrode to move back saturated principle, when the generation collector current is excessive, reduces the driving voltage of the 8th triode VT8, before the 8th triode VT8 damages, with its shutoff, thereby has protected the 8th triode VT8.
The first diode D1 adopts fast recovery diode, high voltage when preventing that the 8th triode VT8 from turn-offing on its collector electrode is scurried into drive circuit, in order to prevent that static from mislead power device, between the grid source and meet the bi-directional voltage stabilizing pipe first voltage stabilizing didoe VS1 and the second voltage stabilizing didoe VS2, the 13 resistance R 13 and the 11 resistance R 11 dividing potential drops constitute a negative voltage, when turn-offing the 8th triode VT8, for providing between the grid source-voltage of 9V, the 8th triode VT8 is turn-offed fast, and the 14 resistance R 14 is gate pole series resistances of the 8th triode VT8.
Claims (4)
1. strong drive circuit with short-circuit protection function; it is characterized in that: comprise drive circuit, control circuit, amplifying circuit and testing circuit; described drive circuit comprises first resistance, second resistance, photoelectrical coupler; first end of described first resistance is that second end of voltage input end, described first resistance is connected with first end of described photoelectrical coupler; second end of described photoelectrical coupler is connected with external circuits; the first end ground connection of described second resistance, second end of described second resistance is connected with the 3rd end of described photoelectrical coupler.
2. the strong drive circuit with short-circuit protection function according to claim 1; it is characterized in that: described control circuit comprises the 3rd resistance; the 4th resistance; the 5th resistance; first electric capacity; second electric capacity; the 3rd electric capacity; the 8th resistance; the 9th resistance; the tenth resistance; the 11 resistance; the 13 resistance; the 14 resistance; first diode; first voltage stabilizing didoe; second voltage stabilizing didoe; the 7th triode and the 8th triode; first end of described the 4th resistance is connected with the 4th end of described photoelectrical coupler; first end of described the 5th resistance is connected with the five terminal of described photoelectrical coupler; second end of described the 5th resistance; first end of described second electric capacity; first end of described the 8th resistance; first end of described the 9th resistance; first end of described the 3rd electric capacity and first end of described the 13 resistance are connected back ground connection; second end of described the 9th resistance is connected with the positive pole of described first diode and the emitter of described the 7th triode respectively; the negative pole of described first diode is connected with first end of described the tenth resistance; second end of described the tenth resistance respectively with second end of described the 3rd electric capacity; the positive pole of described second voltage stabilizing didoe; first end of described the 11 resistance; second end of described the 13 resistance is connected with the emitter of described the 8th triode; the base stage of described the 7th triode is connected with second end of described second electric capacity and second end of described the 8th resistance respectively; the collector electrode of described the 7th triode is connected with first end of described the 3rd resistance and second end of described the 11 resistance respectively; described the 3rd resistance first end is voltage input end; second end of described the 3rd resistance is connected with first end of described first electric capacity; second end of described the 4th resistance is connected with second end of described first electric capacity; the negative pole of described second voltage stabilizing didoe is connected with the negative pole of described first voltage stabilizing didoe, and the positive pole of described first voltage stabilizing didoe is connected with first end of described the 14 resistance and the base stage of described the 8th triode respectively.
3. the strong drive circuit with short-circuit protection function according to claim 1; it is characterized in that: described amplifying circuit comprises first triode; second triode; the 3rd triode; the 4th triode and the 5th triode; the base stage of described first triode is connected with second end of described the 4th resistance; the collector electrode of described first triode is connected with the base stage of described second triode and the base stage of described the 3rd triode respectively; the collector electrode of described second triode is connected with second end of described the 11 resistance; the emitter of described second triode respectively with the emitter of described the 3rd triode; the base stage of described the 4th triode is connected with the base stage of described the 5th triode; the collector electrode of described the 3rd triode is connected with second end of described the 5th resistance; the collector electrode of described the 4th triode is connected with second end of described the 11 resistance; the emitter of described the 4th triode is connected with second end of described the 14 resistance and the emitter of described the 5th triode respectively, and the collector electrode of described the 5th triode is connected with second end of described the 5th resistance.
4. the strong drive circuit with short-circuit protection function according to claim 1; it is characterized in that: described testing circuit comprises second diode; the 6th resistance; the 7th resistance; the 12 resistance and the 6th triode; the negative pole of described second diode be connected with external circuits again after the collector electrode of described the 8th triode is connected; the positive pole of described second diode is connected with first end of described the 12 resistance; second end of described the 12 resistance respectively with first end of described the 6th resistance; the collector electrode of described the 6th triode is connected with the base stage of described the 7th triode; second end of described the 6th resistance is connected with first end of described the 7th resistance and second end of described the 11 resistance respectively; second end of described the 7th resistance is connected with the collector electrode of described first triode; the base stage of described the 6th triode is connected with second end of described the 4th resistance, and the emitter of described the 6th triode is connected with second end of described the 5th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194573 CN203233391U (en) | 2013-04-17 | 2013-04-17 | Strong drive circuit with short-circuit protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320194573 CN203233391U (en) | 2013-04-17 | 2013-04-17 | Strong drive circuit with short-circuit protection function |
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| Publication Number | Publication Date |
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| CN203233391U true CN203233391U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320194573 Expired - Fee Related CN203233391U (en) | 2013-04-17 | 2013-04-17 | Strong drive circuit with short-circuit protection function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977939A (en) * | 2016-06-17 | 2016-09-28 | 阳光电源股份有限公司 | Direct current source protection apparatus and method |
-
2013
- 2013-04-17 CN CN 201320194573 patent/CN203233391U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977939A (en) * | 2016-06-17 | 2016-09-28 | 阳光电源股份有限公司 | Direct current source protection apparatus and method |
| US10581239B2 (en) | 2016-06-17 | 2020-03-03 | Sungrow Power Supply Co., Ltd. | Device and method for protecting direct current source |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140417 |