CN103595238A - Low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit - Google Patents
Low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit Download PDFInfo
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- CN103595238A CN103595238A CN201310453733.6A CN201310453733A CN103595238A CN 103595238 A CN103595238 A CN 103595238A CN 201310453733 A CN201310453733 A CN 201310453733A CN 103595238 A CN103595238 A CN 103595238A
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Abstract
The invention discloses a low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit. The circuit comprises a first driving optocoupler, a second driving optocoupler, a first diode, a second diode, a first triode and a second triode, wherein the first triode and the second triode are used for connecting an IGBT module. According to the invention, driving signals of a singlechip are isolated through the first driving optocoupler and the second driving optocoupler, the IGBT module is driven through the first triode and the second triode, interlocking is realized through the first diode and the second diode, thereby being responsible for controlling high level not to occur simultaneously in driving of the IGBT module, and effectively protecting direct connection between an upper part and a lower part of a bridge of the IGBT module, that is, the first optocoupler, the second optocoupler, the first triode and the second triode of the circuit realize driving of the IGBT module, and the first diode and the second diode do not conduct simultaneously so as to realize gate pole driving interlocking protection of the IGBT module. In addition, the low-power IGBT driving interlocking circuit has the characteristics of simple circuit, low production cost, convenient operation, high sensitivity, stable working performance, good protection effect, strong applicability and the like.
Description
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Technical field
The present invention relates to field of power electronics, relate in particular to a kind of small-power IGBT and drive interlock circuit.
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Background technology
The compound full-control type voltage driven type power semiconductor device that IGBT (Insulated Gate Bipolar Transistor) insulated gate bipolar translator power tube is comprised of BJT (double pole triode) and MOS (insulating gate type field effect tube).IGBT has applied to the fields such as frequency converter, Switching Power Supply, lighting circuit, Traction Drive, new forms of energy widely.And IGBT device is also constantly opening up new application, for energy-efficient, material-saving, industrial automation provide the new world.
Therefore, the driving of IGBT is controlled, is protected and in whole system, born very crucial role.And upper and lower two switching tubes all work of conducting simultaneously in any case of the same brachium pontis of IGBT, in order to realize this purpose, it in prior art, is the method for setting the employing time, after upper bridge cut-off signals, lower bridge ability conducting work, otherwise, after lower bridge cut-off signals, upper bridge ability conducting work, otherwise will damage IGBT module.Other way is exactly only on given signal, to do interlock process, but exist actual IGBT module due to the difference of parameter or the difference of peripheral circuit, although given cut-off signals, in fact IGBT module is not turn-offed, and just completely likely occurs the phenomenon that upper and lower bridge is straight-through.
Comprehensive above-mentioned description, existing isolation drive optocoupler cost is higher and be not with protection, and under abnormal conditions, damaging easily appears in IGBT module.
Summary of the invention
For the weak point existing in above-mentioned technology; the invention provides a kind of circuit simple, use safely, protect small-power IGBT effective and that production cost is low to drive interlock circuit; this circuit drives interlock protection function by band, realizes the interlocking of IGBT module by the effect of two diodes.
For achieving the above object, the invention provides a kind of small-power IGBT and drive interlock circuit, comprise the first driving optocoupler, second drive optocoupler, the first diode, the second diode with for connecting the first triode and second triode of IGBT module;
Described first drives input first pin of optocoupler to connect single-chip microcomputer low level driving signal by the first resistance, described first drives input second pin of optocoupler by one end connection single-chip microcomputer high level driving signal of the second resistance, and the other end of described the second resistance is connected with the first resistance, output the 4th pin of described the first driving optocoupler connects respectively emitter and the base stage of the first triode, and the collector electrode of described the first triode connects respectively the positive pole of the first diode and the gate pole of IGBT module;
Described second drives input first pin of optocoupler by one end connection single-chip microcomputer high level driving signal of the 4th resistance, described second drives input second pin of optocoupler to connect single-chip microcomputer low level driving signal by the 3rd resistance, and the other end of described the 4th resistance is connected with the 3rd resistance, described second drives the input of optocoupler to go out emitter and the base stage that end the 4th pin connects respectively the second triode, and the collector electrode of described the second triode connects respectively the positive pole of the second diode and the gate pole of IGBT module;
Described first drives output the 3rd pin and second of optocoupler to drive output the 3rd pin of optocoupler to be connected, and the negative pole of described the first diode connects the base stage of the second triode, and the negative pole of described the second diode connects the base stage of the first triode.
Wherein, described circuit also comprises the first protection loop being formed by the 5th resistance and the first Capacitance parallel connection, and described first drives the input of optocoupler to go out to hold the 4th pin by the first protection loop, to connect respectively emitter and the base stage of the first triode.
Wherein, described circuit also comprises the second protection loop being formed by the 9th resistance and the second Capacitance parallel connection, and described second drives the input of optocoupler to go out to hold the 4th pin by the second protection loop, to connect respectively emitter and the base stage of the second triode.
Wherein, between the collector electrode of the collector electrode of described the first triode and the second triode, be connected with the 7th resistance and the 8th resistance of connecting, and output the 3rd pin and second that described the 7th resistance and the 8th resistance are connected to respectively the first driving optocoupler drives between output the 3rd pin of optocoupler.
Wherein, described the first protection loop is connected with the emitter of the first triode by the 6th resistance.
Wherein, described the second protection loop is connected with the emitter of the second triode by the tenth resistance.
Wherein, the voltage of described the first triode and the second triode is 5V.
Wherein, the model of described the first driving optocoupler and the second driving optocoupler is TL181.
The invention has the beneficial effects as follows: compared with prior art, small-power IGBT provided by the invention drives interlock circuit, by the first driving optocoupler and second, drive optocoupler that the driving signal of single-chip microcomputer is isolated, by the first triode and the second triode, drive IGBT module, by the first diode and the second diode, realize interlocking, be responsible for controlling IGBT module drive and can not occur high level simultaneously, effectively the bridge up and down of protection IGBT module is straight-through, first of this circuit drive optocoupler, second drives optocoupler, the first triode and the second triode are realized the driving of IGBT module, thereby the first diode and the second diode not conducting are simultaneously realized IGBT module gate-drive interlock protection.The features such as the present invention has that circuit is simple, production cost is low, simple operation, highly sensitive, stable work in work, protection is effective, applicability is strong.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram that small-power IGBT of the present invention drives interlock circuit;
Fig. 2 is the oscillogram of the present invention's the first application examples;
Fig. 3 is the oscillogram of the present invention's the second application examples.
Embodiment
In order more clearly to explain the present invention, below in conjunction with accompanying drawing, the present invention is further described.
Refer to Fig. 1, small-power IGBT of the present invention drives interlock circuit, comprise the first driving optocoupler U1, second drive optocoupler U2, the first diode D1, the second diode D2 with for connecting the first triode Q1 and the second triode Q2 of IGBT module; First drives input the first pin of optocoupler U1 to connect single-chip microcomputer low level driving signal L by the first resistance R 1, first drives input the second pin of optocoupler U1 by one end connection single-chip microcomputer high level driving signal H of the second resistance R 2, and the other end of the second resistance R 2 is connected with the first resistance R 1, output the 4th pin of the first driving optocoupler U1 connects respectively emitter E and the base stage B of the first triode Q1, and the collector electrode C of the first triode Q1 connects respectively the anodal A of the first diode D1 and the gate pole of IGBT module; Second drives input the first pin of optocoupler U2 by one end connection single-chip microcomputer high level driving signal H of the 4th resistance R 4, second drives input the second pin of optocoupler U2 to connect single-chip microcomputer low level driving signal L by the 3rd resistance R 3, and the other end of the 4th resistance R 4 is connected with the 3rd resistance R 3, second drives the input of optocoupler U2 to go out emitter E and the base stage B that end the 4th pin connects respectively the second triode Q2, and the collector electrode C of the second triode Q2 connects respectively the anodal A of the second diode D2 and the gate pole of IGBT module; First drives output the 3rd pin and second of optocoupler U1 to drive output the 3rd pin of optocoupler U2 to be connected, the negative pole K of the first diode D1 connects the base stage B of the second triode Q2, the negative pole K of the second diode D2 connects the base stage B of the first triode Q1, and the voltage of the first triode Q1 and the second triode Q2 is 5V.
Situation compared to prior art, small-power IGBT provided by the invention drives interlock circuit, by the first driving optocoupler U1 and second, drive optocoupler U2 that the driving signal of single-chip microcomputer is isolated, by the first triode Q1 and the second triode Q2, drive IGBT module, by the first diode D1 and the second diode D2, realize interlocking, be responsible for controlling IGBT module drive and can not occur high level simultaneously, effectively the bridge up and down of protection IGBT module is straight-through, first of this circuit drive optocoupler U1, second drives optocoupler U2, the first triode Q1 and the second triode Q2 realize the driving of IGBT module, thereby the first diode D1 and the second diode D2 not conducting simultaneously realize IGBT module gate-drive interlock protection.The features such as the present invention has that circuit is simple, production cost is low, simple operation, highly sensitive, stable work in work, protection is effective, applicability is strong.
The operation principle of this circuit is: the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 is by single-chip microcomputer L, H low and high level drives signal to deliver to the first driving optocoupler U1, second drives on optocoupler U2, when the first driving optocoupler U1 conducting, the first triode Q1 is by saturation conduction, L1 output high level drives IGBT module, L1 is high level, by the first diode D1, by the base stage B point clamper of the second triode Q2, be high level, guarantee that H1 point is low level output, do not drive IGBT module, this step is the first diode D1 conducting, the second not conducting of diode D2, the upper bridge of protection IGBT module is opened, lower bridge closes, otherwise, when the second driving optocoupler U2 conducting, the second triode Q2 is by saturation conduction, H1 output high level drives IGBT module, and H1 is high level, by the second diode D2, by the base stage B point clamper of the first triode Q1, is high level, guarantee that L1 point is low level output, do not drive IGBT module, this step is the first not conducting of diode D1, the first diode D1 conducting, the lower bridge of protection IGBT module is opened, Shang Qiaoguan.
I.e. the first diode D1 and the second diode D2 conducting when different; no matter one of them is low level or high level; another must be with; its level is contrary, therefore, when driving upper and lower two brachium pontis of IGBT module, there will not be the situation of two conductings simultaneously; also there will not be short circuit; even when being interfered, can not occurring with height or with low phenomenon because of disturbing yet, thereby protect IGBT module.
In the present embodiment, circuit also comprises by the 5th resistance R 5 and the first capacitor C 1 the first protection loop forming in parallel, by the 9th resistance R 9 and the second capacitor C 2 the second protection loop forming in parallel, first drives the input of optocoupler U1 to go out to hold the 4th pin by the first protection loop, to connect respectively emitter E and the base stage B of the first triode Q1, and the first protection loop is connected with the emitter E of the first triode Q1 by the 6th resistance R 6, second drives the input of optocoupler U2 to go out to hold the 4th pin by the second protection loop, to connect respectively emitter E and the base stage B of the second triode Q2, the second protection loop is connected with the emitter E of the second triode Q2 by the tenth resistance R 10.By the first protection loop and the second protection loop, can effectively protect triode and drive optocoupler.
In the present embodiment, between the collector electrode C of the collector electrode C of the first triode Q1 and the second triode Q2, be connected with the 7th resistance R 7 and the 8th resistance R 8 of connecting, and output the 3rd pin and second that the 7th resistance R 7 and the 8th resistance R 8 are connected to respectively the first driving optocoupler U1 drives between output the 3rd pin of optocoupler U2.The 7th resistance R 7 and the 8th resistance R 8 play current-limiting protection effect in this circuit.
In the present embodiment, the model of the first driving optocoupler U1 and the second driving optocoupler U2 is TL181.Certainly; the model of this driving optocoupler is not limited to TL181, can also be TLP190 or TLP191 etc., if to driving the change of the model of optocoupler; so also can be appreciated that it is to simple deformation of the present invention or conversion, all fall within the scope of protection of the present invention.
Please further consult Fig. 2-3, from Fig. 2, can show that this small-power IGBT drives interlock circuit to have good time delay response, from Fig. 3, can show that this small-power IGBT drives interlock circuit, realize and drive interlock function, protection IGBT module.
Application examples one, small-power IGBT drives interlock circuit to apply on AC60E series inverter, failure rate 0.2%, good reliability service, relatively traditional optocoupler drive circuit (as W314 optocoupler) failure rate is low by 5.3%.
Application examples two, small-power IGBT drives interlock circuit to use in design, and conventional ADS driving optocoupler cost is much lower relatively, can save 3% of low power frequency conversion entire system cost.
Disclosed is above only several specific embodiment of the present invention, but the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. small-power IGBT drives an interlock circuit, it is characterized in that, comprise the first driving optocoupler, second drive optocoupler, the first diode, the second diode with for connecting the first triode and second triode of IGBT module;
Described first drives input first pin of optocoupler to connect single-chip microcomputer low level driving signal by the first resistance, described first drives input second pin of optocoupler by one end connection single-chip microcomputer high level driving signal of the second resistance, and the other end of described the second resistance is connected with the first resistance, output the 4th pin of described the first driving optocoupler connects respectively emitter and the base stage of the first triode, and the collector electrode of described the first triode connects respectively the positive pole of the first diode and the gate pole of IGBT module;
Described second drives input first pin of optocoupler by one end connection single-chip microcomputer high level driving signal of the 4th resistance, described second drives input second pin of optocoupler to connect single-chip microcomputer low level driving signal by the 3rd resistance, and the other end of described the 4th resistance is connected with the 3rd resistance, described second drives the input of optocoupler to go out emitter and the base stage that end the 4th pin connects respectively the second triode, and the collector electrode of described the second triode connects respectively the positive pole of the second diode and the gate pole of IGBT module;
Described first drives output the 3rd pin and second of optocoupler to drive output the 3rd pin of optocoupler to be connected, and the negative pole of described the first diode connects the base stage of the second triode, and the negative pole of described the second diode connects the base stage of the first triode.
2. small-power IGBT according to claim 1 drives interlock circuit; it is characterized in that; described circuit also comprises the first protection loop being formed by the 5th resistance and the first Capacitance parallel connection, and described first drives the input of optocoupler to go out to hold the 4th pin by the first protection loop, to connect respectively emitter and the base stage of the first triode.
3. small-power IGBT according to claim 1 drives interlock circuit; it is characterized in that; described circuit also comprises the second protection loop being formed by the 9th resistance and the second Capacitance parallel connection, and described second drives the input of optocoupler to go out to hold the 4th pin by the second protection loop, to connect respectively emitter and the base stage of the second triode.
4. small-power IGBT according to claim 1 drives interlock circuit, it is characterized in that, between the collector electrode of the collector electrode of described the first triode and the second triode, be connected with the 7th resistance and the 8th resistance of connecting, and output the 3rd pin and second that described the 7th resistance and the 8th resistance are connected to respectively the first driving optocoupler drives between output the 3rd pin of optocoupler.
5. small-power IGBT according to claim 2 drives interlock circuit, it is characterized in that, described the first protection loop is connected with the emitter of the first triode by the 6th resistance.
6. small-power IGBT according to claim 3 drives interlock circuit, it is characterized in that, described the second protection loop is connected with the emitter of the second triode by the tenth resistance.
7. according to the small-power IGBT described in claim 1-6 any one, drive interlock circuit, it is characterized in that, the voltage of described the first triode and the second triode is 5V.
8. small-power IGBT according to claim 7 drives interlock circuit, it is characterized in that, it is TL181 that described the first driving optocoupler and second drives the model of optocoupler.
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| CN201310453733.6A CN103595238A (en) | 2013-09-29 | 2013-09-29 | Low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit |
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| CN201310453733.6A CN103595238A (en) | 2013-09-29 | 2013-09-29 | Low-power IGBT (insulated gate bipolar transistor) driving interlocking circuit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105375750A (en) * | 2015-12-17 | 2016-03-02 | 南京工程学院 | Driving protection circuit for preventing bridge arm direct connection |
| CN105656301A (en) * | 2016-03-25 | 2016-06-08 | 明纬(广州)电子有限公司 | Resonance control device |
| CN106208818A (en) * | 2016-08-04 | 2016-12-07 | 许继集团有限公司 | A kind of mutual exclusion drive circuit of motor H bridge |
| CN104283540B (en) * | 2014-10-31 | 2017-09-15 | 德力西电气有限公司 | A kind of electrical interlocks circuit |
| CN105743337B (en) * | 2016-04-26 | 2018-04-17 | 湖南利能科技股份有限公司 | IGBT drive signal interlock circuits |
| CN106160448B (en) * | 2016-07-13 | 2018-05-25 | 东文高压电源（天津）股份有限公司 | One kind is with the interlocking positive or negative high voltage switching output circuit that is delayed |
| CN109088398A (en) * | 2018-04-18 | 2018-12-25 | 核工业理化工程研究院 | Large power supply protects system and control method with switching power inverter |
| CN109660239A (en) * | 2019-01-14 | 2019-04-19 | 武汉盛硕电子有限公司 | A kind of interlock circuit and application |
| CN112130050A (en) * | 2020-11-19 | 2020-12-25 | 杭州飞仕得科技有限公司 | IGBT desaturation fault detection device |
| CN117360536A (en) * | 2023-11-07 | 2024-01-09 | 吉咖智能机器人有限公司 | Circuit system for protecting vehicle from faults and vehicle |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283540B (en) * | 2014-10-31 | 2017-09-15 | 德力西电气有限公司 | A kind of electrical interlocks circuit |
| CN105375750A (en) * | 2015-12-17 | 2016-03-02 | 南京工程学院 | Driving protection circuit for preventing bridge arm direct connection |
| CN105656301A (en) * | 2016-03-25 | 2016-06-08 | 明纬(广州)电子有限公司 | Resonance control device |
| CN105743337B (en) * | 2016-04-26 | 2018-04-17 | 湖南利能科技股份有限公司 | IGBT drive signal interlock circuits |
| CN106160448B (en) * | 2016-07-13 | 2018-05-25 | 东文高压电源（天津）股份有限公司 | One kind is with the interlocking positive or negative high voltage switching output circuit that is delayed |
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| CN109660239A (en) * | 2019-01-14 | 2019-04-19 | 武汉盛硕电子有限公司 | A kind of interlock circuit and application |
| CN109660239B (en) * | 2019-01-14 | 2024-02-13 | 武汉盛硕电子有限公司 | Interlocking circuit and application |
| CN112130050A (en) * | 2020-11-19 | 2020-12-25 | 杭州飞仕得科技有限公司 | IGBT desaturation fault detection device |
| CN112130050B (en) * | 2020-11-19 | 2021-03-23 | 杭州飞仕得科技有限公司 | IGBT desaturation fault detection device |
| CN117360536A (en) * | 2023-11-07 | 2024-01-09 | 吉咖智能机器人有限公司 | Circuit system for protecting vehicle from faults and vehicle |
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