CN103687118B - IGBT drive circuit, electromagnetic induction heating device and method thereof - Google Patents
IGBT drive circuit, electromagnetic induction heating device and method thereof Download PDFInfo
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- CN103687118B CN103687118B CN201310629417.XA CN201310629417A CN103687118B CN 103687118 B CN103687118 B CN 103687118B CN 201310629417 A CN201310629417 A CN 201310629417A CN 103687118 B CN103687118 B CN 103687118B
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Abstract
The present invention discloses a kind of IGBT drive circuit, electromagnetic induction heating device and method thereof, this IGBT drive circuit comprises operational module, operational module comprises an IGBT, IGBT drive circuit also comprises: control module, space before for being less than preset value at the electric current of IGBT exports multiple first and opens signal to IGBT, and export second of fixing service time open signal to IGBT for reaching interval after below preset value at the electric current of IGBT, the first service time of opening signal was less than the service time that second opens signal.The present invention can avoid occurring because IGBT flowing through the situation that larger short circuit current causes it to burn out, thus reliably and effectively protect IGBT, improves its useful life, ensure the normal work of described IGBT.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly relate to a kind of IGBT drive circuit, electromagnetic induction heating device and method thereof.
Background technology
IGBT (InsulatedGateBipolarTransistor, insulated gate bipolar transistor) is a kind of electronic device common in control circuit.Generally make IGBT conducting by the signal of opening fixing to IGBT mono-in existing electromagnetic induction heating device, but because the input terminal voltage in electromagnetic induction heating device is general all higher, very large short circuit current can be produced when first time opens IGBT, thus make the electric current flowing through IGBT very large, and fixing open signal under can continue the long period, to impacting the useful life of IGBT, even directly can burn out IGBT, making 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 IGBT reliably.
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, space before for being less than preset value at the electric current of described IGBT exports multiple first and opens signal to IGBT, and export second of fixing service time open signal to IGBT for reaching interval after below preset value at the electric current of described IGBT, described first service time of opening signal is less than the service time that described second opens signal.
Preferably, described operational module also comprises ac input end, rectifier bridge, direct-flow input end, inductance, filter capacitor, coil panel, the alternating current inputted by described ac input end inputs 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 through the collector electrode of described coil panel with described IGBT, 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 first Capacitance parallel connection is at the two ends of described coil panel.
Preferably, the time sequencing exported by described control module, described multiple first service time of opening signal arranges 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 exports multiple first and opens signal to described IGBT;
After the electric current of described IGBT reaches below preset value, second of described control module interval output fixing service time opens signal to described IGBT, and described first service time of opening signal is less than the service time that described second opens signal.
Preferably, the time sequencing exported by described control module, described multiple first service time of opening signal arranges 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 that the present invention proposes, electromagnetic induction heating device and method thereof, arranged from small to large by the output at interval multiple service time first opens signal to IGBT, make described IGBT corresponding interval conducting, until the electric current flowing through described IGBT is less than the maximum operating currenbt of described IGBT, second of output fixing service time open signal to described IGBT again, make described IGBT be operated in normal condition.Thus avoid occurring because described IGBT flowing through the situation that larger short circuit current causes it to burn out, can the reliable and described IGBT of effective protection, improve the useful life of described IGBT, ensure the normal work of described IGBT.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of present pre-ferred embodiments IGBT drive circuit;
Fig. 2 is the corresponding schematic diagram that the collector current size and multiple first of IGBT in present pre-ferred embodiments IGBT drive circuit opens signal;
Fig. 3 is the change in voltage schematic diagram in present pre-ferred embodiments IGBT drive circuit on filter capacitor C.
In order to make technical scheme of the present invention clearly, understand, be described in further detail below in conjunction with accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to the circuit diagram that Fig. 1, Fig. 1 are present pre-ferred embodiments IGBT drive circuit.
Present pre-ferred embodiments 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 inputted by ac input end 11 inputs a direct current to circuit through direct-flow input end 13 again after rectifier bridge 12 rectification, 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 the first electric capacity C1, and the first electric capacity C1 is connected in parallel on the two ends of coil panel 14, for the AC signal in filtering circuit.
Control module 2 exports multiple first for the space before being less than preset value at the electric current of described IGBT and opens signal to IGBT, and export second of fixing service time open signal to IGBT for reaching interval after below preset value at the electric current of described IGBT, described first service time of opening signal is less than the service time that described second opens signal.Wherein, the time sequencing exported by described control module, described multiple first service time of opening signal arranges from small to large.Described preset value is less than or equal to the maximum operating currenbt of described IGBT.
The operation principle of present pre-ferred embodiments IGBT drive circuit specifically describes as follows:
With reference to shown in Fig. 2 and Fig. 3, Fig. 2 is the corresponding schematic diagram that the collector current size and multiple first of IGBT in present pre-ferred embodiments IGBT drive circuit opens signal; Fig. 3 is the change in voltage schematic diagram in present pre-ferred embodiments IGBT drive circuit on filter capacitor C.
In the present embodiment, before IGBT conducting, the direct current inputted through direct-flow input end 13 is that filter capacitor C charges, filter capacitor C both end voltage constantly increases, the output multiple first at control module 2 interval opens signal to IGBT, due to the time sequencing exported by control module 2, described multiple first service time of opening signal arranges from small to large, therefore, outputting to first of IGBT grid at first, to open signal service time less, then the ON time of corresponding IGBT is also shorter, at this moment, whole circuit is powered by the electric discharge of the direct current inputted through direct-flow input end 13 and filter capacitor C, the electric current flowing through IGBT except the surge current of moment during conducting higher, its electric current can 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 flowing through IGBT can not be increased to very large, also too large impact can not be caused on IGBT, meanwhile, due to filter capacitor C during IGBT conducting, coil panel 14, the impedance in the loop of IGBT composition is very little, therefore, the discharge time of filter capacitor C is very short, in the ON time that IGBT is shorter, the velocity of discharge of filter capacitor C is very fast, therefore, after the ON time that IGBT is shorter, voltage on filter capacitor C is dragged down, output to after first of IGBT grid opens signal service time at first completing, certain interval of time, export next again and first open signal to IGBT, within interval time, owing to exporting IGBT to without opening signal, therefore, IGBT ends, the direct current inputted through direct-flow input end 13 is that filter capacitor C charges, due to the effect of 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, export next first open signal to IGBT time, the direct current inputted through direct-flow input end 13 is that the electricity that filter capacitor C charges is not enough to compensation filter electric capacity C at discharge electricity amount before, therefore, export next first open signal to IGBT time, voltage on filter capacitor C is less than its initial voltage, repeat said process, output multiple service time at control module 2 interval arrange from small to large first open signal to IGBT after, voltage on filter capacitor C can reduce gradually, when the voltage on filter capacitor C reduces to a certain extent, the direct current inputted through direct-flow input end 13 and the electric discharge of filter capacitor C are that the electric current that circuit supply has been not enough to make to flow through described IGBT exceeds preset value, then illustrate that the voltage on now filter capacitor C is pulled down to safe range, then second of control module 2 output fixing service time open the grid of signal to described IGBT, described IGBT is made to be operated in normal condition, even if described second service time of opening signal is greater than the service time that described first opens signal when ensure that described IGBT is operated in normal condition reliably, also can not be excessive and burn out because of the short circuit current flowing through IGBT.In the present embodiment, described preset value is less than or equal to the maximum operating currenbt of described IGBT, to ensure that the electric current flowing through described IGBT 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 is described above, does not repeat them here.Owing to have employed above-mentioned IGBT drive circuit; the situation causing it to burn out because described IGBT flowing through larger short circuit current is avoided to occur; can the reliable and described IGBT of effective protection; improve the useful life of described IGBT; ensure the normal work of described IGBT, improve 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 exports multiple first and opens signal to described IGBT; After the electric current of described IGBT reaches below preset value, second of described control module interval output fixing service time opens signal to described IGBT, described first service time of opening signal is less than the service time that described second opens signal, makes described IGBT be operated in normal condition.Thus avoid occurring because described IGBT flowing through the situation that larger short circuit current causes it to burn out, can the reliable and described IGBT of effective protection, improve the useful life of described IGBT, ensure the normal work of described IGBT.
Wherein, the time sequencing exported by described control module, described multiple first service time of opening signal arranges 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, arranged from small to large by the output at interval multiple service time first opens signal to IGBT, make described IGBT corresponding interval conducting, until the electric current flowing through described IGBT is less than the maximum operating currenbt of described IGBT, second of output fixing service time open signal to described IGBT again, make described IGBT be operated in normal condition.Thus avoid occurring because described IGBT flowing through the situation that larger short circuit current causes it to burn out, can the reliable and described IGBT of effective protection, improve the useful life of described IGBT, ensure the normal work of described IGBT.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or flow process conversion; 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 (7)
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, space before for being less than preset value at the electric current of described IGBT exports multiple first and opens signal to IGBT, and export second of fixing service time open signal to IGBT for reaching interval after below preset value at the electric current of described IGBT, described first service time of opening signal is less than the service time that described second opens signal; By the time sequencing that described control module exports, described multiple first service time of opening signal arranges from small to large.
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 inputted by described ac input end inputs 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 through the collector electrode of described coil panel with described IGBT, 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 first Capacitance parallel connection is at the two ends of described coil panel.
4. IGBT drive circuit according to claim 1, is characterized in that, described preset value is less than or equal to the maximum operating currenbt of described IGBT.
5. an electromagnetic induction heating device, is characterized in that, comprises the IGBT drive circuit in Claims 1-4 described in any one.
6. 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 exports multiple first and opens signal to described IGBT;
After the electric current of described IGBT reaches below preset value, second of described control module interval output fixing service time opens signal to described IGBT, described first service time of opening signal is less than the service time that described second opens signal, by the time sequencing that described control module exports, described multiple first service time of opening signal arranges from small to large.
7. method according to claim 6, 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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| CN103687118B true CN103687118B (en) | 2015-12-09 |
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| 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 |
| 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 |
| 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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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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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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