CN103687118A - IGBT drive circuit, and electromagnetic induction heating device and method - Google Patents
IGBT drive circuit, and electromagnetic induction heating device and method Download PDFInfo
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- CN103687118A CN103687118A CN201310629417.XA CN201310629417A CN103687118A CN 103687118 A CN103687118 A CN 103687118A CN 201310629417 A CN201310629417 A CN 201310629417A CN 103687118 A CN103687118 A CN 103687118A
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Abstract
The invention discloses an IGBT drive circuit, and an electromagnetic induction heating device and method. The IGBT drive circuit comprises an operating module. The operating module comprises an IGBT. The IGBT drive circuit further comprises a control module. The control module is used for alternately outputting a plurality of first on signals to the IGBT before current of the IGBT is smaller than a preset value, and alternately outputting second on signals with fixed on time to the IGBT after the current of the IGBT is smaller than the preset value. On time of the first on signals is smaller than that of the second signals. Burnout of the IGBT caused by high short-circuit current flowing by the IGBT can be avoided, and thus the IGBT is reliably and effectively protected, the service life of the IGBT is prolonged and normal operation of the IGBT is ensured.
Description
Technical field
The present invention relates to electronic circuit technology field, relate in particular to a kind of IGBT drive circuit, electromagnetic induction heating device and method thereof.
Background technology
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) is a kind of electronic device common in control circuit.In existing electromagnetic induction heating device, be generally by making IGBT conducting to fixing signal of opening of IGBT, but because the input terminal voltage in electromagnetic induction heating device is generally all higher, when opening IGBT for the first time, can produce very large short circuit current, thereby the electric current of the IGBT that makes to flow through is very large, and the long period can be continued in fixing opening under signal, can even can directly burn out IGBT to impacting the useful life of IGBT, make electromagnetic induction heating device cisco unity malfunction.
Summary of the invention
Main purpose of the present invention is to provide a kind of IGBT drive circuit, electromagnetic induction heating device and the method thereof that can protect reliably IGBT.
In order to achieve the above object, the present invention proposes a kind of IGBT drive circuit, comprises operational module, and described operational module comprises an IGBT, and described IGBT drive circuit also comprises:
Control module, for interval before the electric current of described IGBT is less than preset value, export a plurality of first and open signal to IGBT, and after reaching below preset value for the electric current at described IGBT interval output fixedly service time second open signal to IGBT, described the first service time of opening signal is less than described the second service time of opening signal.
Preferably, described operational module also comprises ac input end, rectifier bridge, direct-flow input end, inductance, filter capacitor, coil panel, the alternating current of being inputted by described ac input end is inputted a direct current to circuit through described direct-flow input end again after described rectifier bridge rectification, described inductance one end is connected with the positive pole of described direct-flow input end, the minus earth of described direct-flow input end, the described inductance other end is connected with one end of described filter capacitor, the other end ground connection of described filter capacitor, one end of described filter capacitor is also connected with the collector electrode of described IGBT through described coil panel, the grounded emitter of described IGBT, the grid of described IGBT is connected with described control module.
Preferably, described operational module also comprises the first electric capacity, and described the first Capacitance parallel connection is at the two ends of described coil panel.
Preferably, by the time sequencing of described control module output, described a plurality of the first service times of opening signal arrange from small to large.
Preferably, described preset value is less than or equal to the maximum operating currenbt of described IGBT.
The present invention also proposes a kind of electromagnetic induction heating device, comprises IGBT drive circuit as above.
The present invention proposes again a kind of IGBT driving method of electromagnetic induction heating device, comprising:
Before the electric current of IGBT is less than preset value, control module interval is exported a plurality of first and is opened signal to described IGBT;
After the electric current of described IGBT reaches below preset value, described control module interval output fixedly service time second open extremely described IGBT of signal, described the first service time of opening signal is less than described the second service time of opening signal.
Preferably, by the time sequencing of described control module output, described a plurality of the first service times of opening signal arrange from small to large.
Preferably, described preset value is less than or equal to the maximum operating currenbt of described IGBT.
A kind of IGBT drive circuit, electromagnetic induction heating device and method thereof that the present invention proposes, by output a plurality of service times at interval arrange from small to large first open signal to IGBT, make described IGBT corresponding interval conducting, until flow through, the electric current of described IGBT is less than the maximum operating currenbt of described IGBT, again output fixedly service time second open extremely described IGBT of signal, make described IGBT be operated in normal condition.Thereby avoid occurring because the larger short circuit current of flowing through on described IGBT causes situation that it burns out, can be reliably and effectively protect described IGBT, improve the useful life of described IGBT, guarantee the normal work of described IGBT.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of preferred embodiment IGBT drive circuit of the present invention;
Fig. 2 is the corresponding schematic diagram that the collector current size and a plurality of first of IGBT in preferred embodiment IGBT drive circuit of the present invention is opened signal;
Fig. 3 is the change in voltage schematic diagram on filter capacitor C in preferred embodiment IGBT drive circuit of the present invention.
In order to make technical scheme of the present invention clearer, clear, below in conjunction with accompanying drawing, be described in further detail.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is the circuit diagram of preferred embodiment IGBT drive circuit of the present invention.
Preferred embodiment of the present invention proposes a kind of IGBT drive circuit, comprise operational module 1, operational module 1 comprises an IGBT, operational module 1 also comprises ac input end 11, rectifier bridge 12, direct-flow input end 13, inductance L, filter capacitor C, coil panel 14, the alternating current of being inputted by ac input end 11 is inputted direct currents to circuit through direct-flow input end 13 again after rectifier bridge 12 rectifications, inductance L one end is connected with the positive pole of direct-flow input end 13, the minus earth of direct-flow input end 13, the inductance L other end is connected with one end of filter capacitor C, the other end ground connection of filter capacitor C, one end of filter capacitor C is also connected with the collector electrode C of IGBT through coil panel 14, the emitter E ground connection of IGBT, the grid G of IGBT is connected with control module 2.
Further, operational module 1 also comprises that the first capacitor C 1, the first capacitor C 1 is connected in parallel on the two ends of coil panel 14, for the AC signal of filtering circuit.
Control module 2 for the electric current at described IGBT, be less than preset value before interval export a plurality of first and open signal to IGBT, and after reaching below preset value for the electric current at described IGBT interval output fixedly service time second open signal to IGBT, described the first service time of opening signal is less than described the second service time of opening signal.Wherein, by the time sequencing of described control module output, described a plurality of the first service times of opening signal arrange from small to large.Described preset value is less than or equal to the maximum operating currenbt of described IGBT.
The operation principle of preferred embodiment IGBT drive circuit of the present invention specifically describes as follows:
Shown in Fig. 2 and Fig. 3, Fig. 2 is the corresponding schematic diagram that the collector current size and a plurality of first of IGBT in preferred embodiment IGBT drive circuit of the present invention is opened signal; Fig. 3 is the change in voltage schematic diagram on filter capacitor C in preferred embodiment IGBT drive circuit of the present invention.
In the present embodiment, before IGBT conducting, direct current through direct-flow input end 13 inputs is that filter capacitor C charges, filter capacitor C both end voltage constantly increases, the output a plurality of first at control module 2 intervals is opened signal to IGBT, due to the time sequencing of exporting by control module 2, described a plurality of the first service time of opening signal arranges from small to large, therefore, outputing at first first of IGBT grid, to open signal service time less, the ON time of corresponding IGBT is also shorter, at this moment, whole circuit is powered by the direct current through direct-flow input end 13 inputs and the electric discharge of filter capacitor C, flow through the electric current of IGBT during except conducting the surge current of moment higher, its electric current can be along with ON time be from smaller value quick increase in direct ratio, because the ON time of IGBT is shorter, therefore, the pulse current of IGBT of flowing through can not be increased to very large, on IGBT, can not cause too large impact yet, meanwhile, filter capacitor C during due to IGBT conducting, coil panel 14, the impedance in the loop that IGBT forms is very little, therefore, the discharge time of filter capacitor C is very short, in the shorter ON time of IGBT, the velocity of discharge of filter capacitor C is very fast, therefore, after the shorter ON time of IGBT, voltage on filter capacitor C is dragged down, output at first first of IGBT grid and open signal after service time completing, certain interval of time, export again next and first open signal to IGBT, within interval time, owing to exporting IGBT to without opening signal, therefore, IGBT cut-off, direct current through direct-flow input end 13 inputs is that filter capacitor C charges, effect due to inductance L, the charging interval of filter capacitor C is very long, within interval time, the charging rate of filter capacitor C is very slow, output next first while opening signal to IGBT, the electric weight that is filter capacitor C charging through the direct current of direct-flow input end 13 input is not enough to compensation filter capacitor C at discharge electricity amount before, therefore, output next first while opening signal to IGBT, voltage on filter capacitor C is less than its initial voltage, repeat said process, output a plurality of service times at control module 2 intervals arrange from small to large first open signal to IGBT, voltage on filter capacitor C can reduce gradually, lower voltage on filter capacitor C is to a certain extent time, through direct-flow input end 13 direct currents of input and the electric discharge of filter capacitor C, be that circuit supply is not enough so that the electric current of the described IGBT that flows through exceeds preset value, illustrate that the voltage on filter capacitor C has now been pulled down to safe range, control module 2 output fixedly service time second open the extremely grid of described IGBT of signal, make described IGBT be operated in normal condition, even described the second service time of opening signal is greater than described the first service time of opening signal while having guaranteed reliably that described IGBT is operated in normal condition, can be because of the short circuit current of the IGBT that flows through yet excessive burning out.In the present embodiment, described preset value is less than or equal to the maximum operating currenbt of described IGBT, with the electric current of the described IGBT that guarantees to flow through, can not exceed its maximum operating currenbt, thus protection IGBT.
The present invention also proposes a kind of electromagnetic induction heating device, and this electromagnetic induction heating device comprises above-mentioned IGBT drive circuit, and its operation principle as mentioned above, does not repeat them here.Owing to having adopted above-mentioned IGBT drive circuit; avoid occurring because the larger short circuit current of flowing through on described IGBT causes its situation about burning out; can be reliably and effectively protect described IGBT; improve the useful life of described IGBT; guarantee the normal work of described IGBT, improved job stability and the working life of electromagnetic induction heating device.
The present invention proposes again a kind of IGBT driving method of electromagnetic induction heating device, and before the electric current of IGBT is less than preset value, control module interval is exported a plurality of first and opened signal to described IGBT; After the electric current of described IGBT reaches below preset value, described control module interval output fixedly service time second open extremely described IGBT of signal, described the first service time of opening signal is less than described the second service time of opening signal, makes described IGBT be operated in normal condition.Thereby avoid occurring because the larger short circuit current of flowing through on described IGBT causes situation that it burns out, can be reliably and effectively protect described IGBT, improve the useful life of described IGBT, guarantee the normal work of described IGBT.
Wherein, by the time sequencing of described control module output, described a plurality of the first service times of opening signal arrange from small to large, and described preset value is less than or equal to the maximum operating currenbt of described IGBT.
Above-mentioned IGBT drive circuit, electromagnetic induction heating device and method thereof, by output a plurality of service times at interval arrange from small to large first open signal to IGBT, make described IGBT corresponding interval conducting, until flow through, the electric current of described IGBT is less than the maximum operating currenbt of described IGBT, again output fixedly service time second open extremely described IGBT of signal, make described IGBT be operated in normal condition.Thereby avoid occurring because the larger short circuit current of flowing through on described IGBT causes situation that it burns out, can be reliably and effectively protect described IGBT, improve the useful life of described IGBT, guarantee the normal work of described IGBT.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. an IGBT drive circuit, comprises operational module, and described operational module comprises an IGBT, it is characterized in that, described IGBT drive circuit also comprises:
Control module, for interval before the electric current of described IGBT is less than preset value, export a plurality of first and open signal to IGBT, and after reaching below preset value for the electric current at described IGBT interval output fixedly service time second open signal to IGBT, described the first service time of opening signal is less than described the second service time of opening signal.
2. IGBT drive circuit according to claim 1, it is characterized in that, described operational module also comprises ac input end, rectifier bridge, direct-flow input end, inductance, filter capacitor, coil panel, the alternating current of being inputted by described ac input end is inputted a direct current to circuit through described direct-flow input end again after described rectifier bridge rectification, described inductance one end is connected with the positive pole of described direct-flow input end, the minus earth of described direct-flow input end, the described inductance other end is connected with one end of described filter capacitor, the other end ground connection of described filter capacitor, one end of described filter capacitor is also connected with the collector electrode of described IGBT through described coil panel, the grounded emitter of described IGBT, the grid of described IGBT is connected with described control module.
3. IGBT drive circuit according to claim 2, is characterized in that, described operational module also comprises the first electric capacity, and described the first Capacitance parallel connection is at the two ends of described coil panel.
4. according to the IGBT drive circuit described in any one in claims 1 to 3, it is characterized in that, by the time sequencing of described control module output, described a plurality of the first service times of opening signal arrange from small to large.
5. IGBT drive circuit according to claim 4, is characterized in that, described preset value is less than or equal to the maximum operating currenbt of described IGBT.
6. an electromagnetic induction heating device, is characterized in that, comprises the IGBT drive circuit described in any one in claim 1 to 5.
7. an IGBT driving method for electromagnetic induction heating device, is characterized in that, comprising:
Before the electric current of IGBT is less than preset value, control module interval is exported a plurality of first and is opened signal to described IGBT;
After the electric current of described IGBT reaches below preset value, described control module interval output fixedly service time second open extremely described IGBT of signal, described the first service time of opening signal is less than described the second service time of opening signal.
8. method according to claim 7, is characterized in that, by the time sequencing of described control module output, described a plurality of the first service times of opening signal arrange from small to large.
9. method according to claim 8, is characterized in that, described preset value is less than or equal to the maximum operating currenbt of described IGBT.
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| CN201310629417.XA CN103687118B (en) | 2013-11-29 | 2013-11-29 | IGBT drive circuit, electromagnetic induction heating device and method thereof |
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| CN201310629417.XA CN103687118B (en) | 2013-11-29 | 2013-11-29 | IGBT drive circuit, electromagnetic induction heating device and method thereof |
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| CN103687118A true CN103687118A (en) | 2014-03-26 |
| CN103687118B CN103687118B (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270343A (en) * | 2016-12-30 | 2018-07-10 | 佛山市顺德区美的电热电器制造有限公司 | A kind of method and system of adjust automatically single tube IGBT working conditions |
| CN108419323A (en) * | 2017-02-10 | 2018-08-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus, electromagnetic heating system and its method for heating and controlling and device |
| CN110049589A (en) * | 2018-12-27 | 2019-07-23 | 浙江绍兴苏泊尔生活电器有限公司 | Determination method, electromagnetic heating circuit and the electromagnetic heating utensil of valley calibration |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102960054A (en) * | 2010-06-28 | 2013-03-06 | Bsh博世和西门子家用电器有限公司 | Cooker hob device |
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- 2013-11-29 CN CN201310629417.XA patent/CN103687118B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102960054A (en) * | 2010-06-28 | 2013-03-06 | Bsh博世和西门子家用电器有限公司 | Cooker hob device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108270343A (en) * | 2016-12-30 | 2018-07-10 | 佛山市顺德区美的电热电器制造有限公司 | A kind of method and system of adjust automatically single tube IGBT working conditions |
| CN108270343B (en) * | 2016-12-30 | 2019-09-27 | 佛山市顺德区美的电热电器制造有限公司 | A kind of method and system of adjust automatically single tube IGBT working condition |
| CN108419323A (en) * | 2017-02-10 | 2018-08-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus, electromagnetic heating system and its method for heating and controlling and device |
| CN108419323B (en) * | 2017-02-10 | 2021-07-20 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating equipment, electromagnetic heating system and heating control method and device thereof |
| CN110049589A (en) * | 2018-12-27 | 2019-07-23 | 浙江绍兴苏泊尔生活电器有限公司 | Determination method, electromagnetic heating circuit and the electromagnetic heating utensil of valley calibration |
| CN110049589B (en) * | 2018-12-27 | 2021-08-24 | 浙江绍兴苏泊尔生活电器有限公司 | Determination method of valley value calibration, electromagnetic heating circuit and electromagnetic heating appliance |
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| CN103687118B (en) | 2015-12-09 |
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Inventor after: Lei Jun Inventor after: Yuan Hongbin Inventor after: Yang Le Inventor after: Fang Zhen Inventor after: Huang Bing Inventor after: Ma Baizhong Inventor after: Li Xinhe Inventor after: Yang Liping Inventor after: Huang Shufeng Inventor after: Huang Kaiping Inventor after: Dong Yuan Inventor after: Zhang Yongliang Inventor after: Qiao Weijun Inventor before: Li Xinhe Inventor before: Yuan Hongbin Inventor before: Yang Le Inventor before: Fang Zhen Inventor before: Huang Bing Inventor before: Yang Liping Inventor before: Huang Shufeng Inventor before: Huang Kaiping Inventor before: Ma Baizhong Inventor before: Lei Jun Inventor before: Dong Yuan Inventor before: Zhang Yongliang Inventor before: Qiao Weijun |
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Free format text: CORRECT: INVENTOR; FROM: LI XINHE YANG LIPING HUANG SHUFENG HUANG KAIPING MA BAIZHONG LEI JUN DONG YUAN ZHANG YONGLIANG QIAO WEIJUN YUAN HONGBIN YANG LE FANG ZHEN HUANG BING TO: LEI JUN MA BAIZHONG LI XINHE YANG LIPING HUANG SHUFENG HUANG KAIPING DONG YUAN ZHANG YONGLIANG QIAO WEIJUN YUAN HONGBIN YANG LE FANG ZHEN HUANG BING |
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