CN204362014U - Drive circuit and electronic equipment - Google Patents
Drive circuit and electronic equipment Download PDFInfo
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- CN204362014U CN204362014U CN201520077828.7U CN201520077828U CN204362014U CN 204362014 U CN204362014 U CN 204362014U CN 201520077828 U CN201520077828 U CN 201520077828U CN 204362014 U CN204362014 U CN 204362014U
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Abstract
The utility model discloses a kind of drive circuit, drive circuit comprises control chip, driver module and switching tube; Wherein, described switching tube has first end, the second end and the control end for controlling first end and the second end connected state; Described control end is connected with the signal output part of described driver module; Described control chip is used for driver module described in output pulse width modulation signal, and described pulse-width signal exports described switching tube to through the signal output part of described driver module, to drive described switching tube; Driver module for detecting the output voltage size of described signal output part, and adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal.The invention also discloses a kind of electronic equipment.The utility model improves the stability of switching tube work.
Description
Technical field
The utility model relates to electronic technology field, particularly relates to drive circuit and electronic equipment.
Background technology
As everyone knows, normally by single-chip microcomputer output pulse width modulation signal in existing IGBT drive circuit, after driver module amplifies, the gate pole that gate drive voltage directly outputs to IGBT is formed, with the switch of control IGBT.Owing to not detecting the gate drive voltage of IGBT, under the higher or lower state of the gate drive voltage of IGBT, occur easily causing IGBT overcurrent or cannot the ill effect such as conducting affecting the stability of IGBT work.
Foregoing only understands the technical solution of the utility model for auxiliary, does not represent and admits that foregoing is prior art.
Utility model content
Main purpose of the present utility model is to provide a kind of drive circuit and electronic equipment, is intended to the stability improving switching tube work.
To achieve these goals, the utility model provides a kind of drive circuit, comprises control chip, driver module and switching tube; Wherein,
Described switching tube has first end, the second end and the control end for controlling first end and the second end connected state; Described control end is connected with the signal output part of described driver module;
Described control chip is used for driver module described in output pulse width modulation signal, and described pulse-width signal exports described switching tube to through the signal output part of described driver module, to drive described switching tube;
Driver module for detecting the output voltage size of described signal output part, and adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal.
Preferably, described driver module also for the described pulse-width signal received and preset reference square wave signal being compared, and adjusts the state of the pulse-width signal that described signal output part exports according to the result compared.
Preferably, the state that described driver module adjusts according to the result compared the pulse-width signal that described signal output part exports comprises:
When the pulsewidth of the pulse-width signal that described driver module receives is greater than the pulsewidth of described reference square wave signal, the described driver module pulse-width adjustment controlled in the pulse-width signal corresponding cycle of described signal output part output is the pulsewidth of described reference square wave signal, and/or controls the pulse-width signal that described signal output part stops output;
Or when the pulsewidth of the pulse-width signal that described driver module receives is greater than the pulsewidth of described reference square wave signal, described driver module outputs control signals to described control chip, exports the state of the pulse-width signal of described driver module for described control chip adjustment to.
Preferably, described driver module adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal and comprises:
When the output voltage size of described signal output part does not belong to preset interval range, described driver module controls the pulse-width signal that described signal output part stops exporting;
Or when the output voltage size of described signal output part does not belong to preset interval range, described driver module outputs control signals to described control chip, stop exporting described pulse-width signal for described control chip.
Preferably, described control chip is insulated gate bipolar transistor, described first end is the collector electrode of described insulated gate bipolar transistor, and described second end is the emitter of described insulated gate bipolar transistor, and described control end is the gate pole of described insulated gate bipolar transistor.
Preferably, described driver module is also for detecting the voltage between the collector electrode of described insulated gate bipolar transistor and emitter, and when described insulated gate bipolar transistor is opened, according to open moment the collector electrode of described insulated gate bipolar transistor and emitter between voltage determine the operating state of described insulated gate bipolar transistor, the output voltage adjusting described signal output part according to described operating state rises to the time of the second preset value.
Preferably, described operating state comprises startup, firmly to open and normally;
The time that the described output voltage adjusting described signal output part according to operating state rises to the second preset value comprises:
When described operating state is for starting, the voltage rise of described signal output part is first threshold to the time of the second preset value;
When described operating state is for firmly opening, the voltage rise of described signal output part is Second Threshold to the time of the second preset value;
When described operating state is normal, the voltage rise of described signal output part is the 3rd threshold value to the time of the second preset value;
Preferably, the voltage detecting end of described driver module is connected with the collector electrode of described insulated gate bipolar transistor, and earth terminal is connected with the emitter of described insulated gate bipolar transistor.
In addition, for achieving the above object, the utility model also provides a kind of electronic equipment, and described electronic equipment comprises drive circuit, and described drive circuit comprises control chip, driver module and switching tube; Wherein,
Described switching tube has first end, the second end and the control end for controlling first end and the second end connected state; Described control end is connected with the signal output part of described driver module;
Described control chip is used for driver module described in output pulse width modulation signal, and described pulse-width signal exports described switching tube to through the signal output part of described driver module, to drive described switching tube;
Driver module for detecting the output voltage size of described signal output part, and adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal.
The utility model embodiment is by arranging driver module connection control chip and switching tube, and exported the state of described pulse-width signal according to the voltage control signal output of signal output part by driver module, thus can effectively prevent the driving voltage of switching tube too high, switching tube is caused to burn out, the too low switching tube that makes of the driving voltage of switching tube cannot be opened or be in magnifying state, and therefore the utility model embodiment improves the stability of switching tube work.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the utility model drive circuit preferred embodiment.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of drive circuit, and with reference to Fig. 1, in one embodiment, this drive circuit comprises control chip 10, driver module 20 and switching tube 30; Wherein,
Described switching tube 30 has first end, the second end and the control end for controlling first end and the second end connected state; Described control end is connected with the signal output part of described driver module 20;
Described control chip 10 is for driver module 20 described in output pulse width modulation signal, and described pulse-width signal exports described switching tube 30 to through the signal output part of described driver module 20, to drive described switching tube 30;
Driver module 20 for detecting the output voltage size of described signal output part, and adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal.
The drive circuit that the present embodiment provides is mainly used in the drived control realizing switching tube 30.Particularly, the structure of above-mentioned switching tube can be arranged according to actual needs, in the present embodiment, switching tube 30 is preferably insulated gate bipolar transistor (IGBT), above-mentioned first end is the collector electrode of described insulated gate bipolar transistor, described second end is the emitter of described insulated gate bipolar transistor, and described control end is the gate pole of described insulated gate bipolar transistor.
Above-mentioned driver module 20 adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal and comprises:
When the output voltage size of described signal output part does not belong to preset interval range, described driver module controls the pulse-width signal that described signal output part stops exporting;
Or when the output voltage size of described signal output part does not belong to preset interval range, described driver module outputs control signals to described control chip, stop exporting described pulse-width signal for described control chip.
The large I of above-mentioned preset interval range is arranged according to actual needs, does not do limiting further at this, as long as can driving switch pipe 30, and prevents switching tube 30 to be burned.
Should be noted that, above-mentioned driver module 20 can adopt the voltage swing of built-in voltage sampling circuit detection signal input, also comparator can be adopted to judge the voltage swing of first end, and physical circuit form can be arranged according to actual needs, does not do limiting further at this.Be understandable that, when the output voltage size of signal output part does not belong to preset interval range, also can be adjusted the voltage swing of the signal output part of this driver module 20 by control chip 10 or driver module 20, be stabilized in make the size of signal output part and belong in preset interval range.Particularly, the output voltage of above-mentioned signal output part is the gate drive voltage of above-mentioned insulated gate bipolar transistor.Such as, when the gate drive voltage of insulated gate bipolar transistor is greater than the higher limit of above-mentioned preset interval range, can stop by driver module 20 gate pole (voltage by the gate pole of insulated gate bipolar transistor drags down) pulse-width signal being exported to insulated gate bipolar transistor.Thus prevent the gate drive voltage of insulated gate bipolar transistor too high causing from damaging insulated gate bipolar transistor.
The utility model embodiment is by arranging driver module 20 connection control chip 10 and switching tube 30, and exported the state of described pulse-width signal according to the voltage control signal output of signal output part by driver module 20, thus can effectively prevent the driving voltage of switching tube 30 too high, switching tube 30 is caused to burn out, the too low switching tube that makes of the driving voltage of switching tube cannot be opened or be in magnifying state, and therefore the utility model embodiment improves the stability that switching tube 30 works.
Further, based on above-described embodiment, in the present embodiment, above-mentioned driver module 20 also for the described pulse-width signal received and preset reference square wave signal being compared, and adjusts the state of the pulse-width signal that described signal output part exports according to the result compared.
In the present embodiment, said reference square-wave signal can be produced by above-mentioned control chip 30 or be produced by square wave circuit for generating, and the pulsewidth of this reference square wave signal is the maximum pulse width allowing to export.
When the pulsewidth of the pulse-width signal that described driver module 20 receives is greater than the pulsewidth of described reference square wave signal, described driver module 20 pulse-width adjustment controlled in the pulse-width signal corresponding cycle of described signal output part output is the pulsewidth of described reference square wave signal, and/or controls the pulse-width signal that described signal output part stops output;
Or when the pulsewidth of the pulse-width signal that described driver module 20 receives is greater than the pulsewidth of described reference square wave signal, described driver module 20 outputs control signals to described control chip 10, exports the state of the pulse-width signal of described driver module 20 for described control chip 10 adjustment to.
In the present embodiment, by limiting the duty ratio of pulse-width signal, thus prevent because insulated gate bipolar transistor ON time is long, cause insulated gate bipolar transistor overcurrent, overvoltage, the phenomenon such as overheated, therefore improve the fail safe that insulated gate bipolar transistor uses.
Further, based on above-described embodiment, in the present embodiment, above-mentioned driver module 20 is also for detecting the voltage between the collector electrode of described insulated gate bipolar transistor and emitter, and when described insulated gate bipolar transistor is opened, according to open moment the collector electrode of described insulated gate bipolar transistor and emitter between voltage determine the operating state of described insulated gate bipolar transistor, the output voltage adjusting described signal output part according to described operating state rises to the time of the second preset value.
It should be noted that the voltage detecting end of above-mentioned driver module 20 is connected with the collector electrode of described insulated gate bipolar transistor, earth terminal is connected with the emitter of described insulated gate bipolar transistor; Thus the voltage detected between insulated gate bipolar transistor collector electrode and emitter.
Particularly, above-mentioned operating state comprises startup, firmly to open and normally;
The time that the described output voltage adjusting described signal output part according to operating state rises to the second preset value comprises:
When described operating state is for starting, the voltage rise of described signal output part is first threshold to the time of the second preset value;
When described operating state is for firmly opening, the voltage rise of described signal output part is Second Threshold to the time of the second preset value;
When described operating state is normal, the voltage rise of described signal output part is the 3rd threshold value to the time of the second preset value.
In the present embodiment, the hard switching that the advanced conducting of IGBT (the non-resonance of Vce of IGBT to 0 time just open IGBT) causes and the one-period that IGBT opens can cause the current peak of IGBT very large because resonant capacitance sharply rises to DC bus-bar voltage (being 311V in 220V situation) both of these case by 0 voltage.
The utility model also provides a kind of electronic equipment, and this electronic equipment comprises drive circuit, and the structure of this drive circuit can refer to above-described embodiment, does not repeat them here.Naturally, the electronic equipment due to the present embodiment have employed the technical scheme of above-mentioned drive circuit, and therefore this electronic equipment has all beneficial effects of above-mentioned drive circuit.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model specification and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. a drive circuit, is characterized in that, comprises control chip, driver module and switching tube; Wherein,
Described switching tube has first end, the second end and the control end for controlling first end and the second end connected state; Described control end is connected with the signal output part of described driver module;
Described control chip is used for driver module described in output pulse width modulation signal, and described pulse-width signal exports described switching tube to through the signal output part of described driver module, to drive described switching tube;
Driver module for detecting the output voltage size of described signal output part, and adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal.
2. drive circuit as claimed in claim 1, it is characterized in that, described driver module also for the described pulse-width signal received and preset reference square wave signal being compared, and adjusts the state of the pulse-width signal that described signal output part exports according to the result compared.
3. drive circuit as claimed in claim 2, is characterized in that, the state that described driver module adjusts according to the result compared the pulse-width signal that described signal output part exports comprises:
When the pulsewidth of the pulse-width signal that described driver module receives is greater than the pulsewidth of described reference square wave signal, the described driver module pulse-width adjustment controlled in the pulse-width signal corresponding cycle of described signal output part output is the pulsewidth of described reference square wave signal, and/or controls the pulse-width signal that described signal output part stops output;
Or when the pulsewidth of the pulse-width signal that described driver module receives is greater than the pulsewidth of described reference square wave signal, described driver module outputs control signals to described control chip, exports the state of the pulse-width signal of described driver module for described control chip adjustment to.
4. drive circuit as claimed in claim 1, is characterized in that, described driver module adjusts according to the output voltage size of described signal output part the state that described signal output part exports described pulse-width signal and comprises:
When the output voltage size of described signal output part does not belong to preset interval range, described driver module controls the pulse-width signal that described signal output part stops exporting;
Or when the output voltage size of described signal output part does not belong to preset interval range, described driver module outputs control signals to described control chip, stop exporting described pulse-width signal for described control chip.
5. drive circuit as claimed in claim 1, it is characterized in that, described control chip is insulated gate bipolar transistor, described first end is the collector electrode of described insulated gate bipolar transistor, described second end is the emitter of described insulated gate bipolar transistor, and described control end is the gate pole of described insulated gate bipolar transistor.
6. drive circuit as claimed in claim 5, it is characterized in that, described driver module is also for detecting the voltage between the collector electrode of described insulated gate bipolar transistor and emitter, and when described insulated gate bipolar transistor is opened, according to open moment the collector electrode of described insulated gate bipolar transistor and emitter between voltage determine the operating state of described insulated gate bipolar transistor, the output voltage adjusting described signal output part according to described operating state rises to the time of the second preset value.
7. drive circuit as claimed in claim 6, is characterized in that, described operating state comprises startup, firmly to open and normally;
The time that the described output voltage adjusting described signal output part according to operating state rises to the second preset value comprises:
When described operating state is for starting, the voltage rise of described signal output part is first threshold to the time of the second preset value;
When described operating state is for firmly opening, the voltage rise of described signal output part is Second Threshold to the time of the second preset value;
When described operating state is normal, the voltage rise of described signal output part is the 3rd threshold value to the time of the second preset value.
8. drive circuit as claimed in claim 5, it is characterized in that, the voltage detecting end of described driver module is connected with the collector electrode of described insulated gate bipolar transistor, and earth terminal is connected with the emitter of described insulated gate bipolar transistor.
9. an electronic equipment, is characterized in that, comprises the drive circuit according to any one of claim 1 to 8.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520077828.7U CN204362014U (en) | 2015-02-03 | 2015-02-03 | Drive circuit and electronic equipment |
| JP2017540765A JP6473514B2 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic induction heating control circuit and electromagnetic induction heating equipment |
| EP15880852.7A EP3255957B1 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic heating control circuit and electromagnetic heating device |
| PCT/CN2015/082969 WO2016123897A1 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic heating control circuit and electromagnetic heating device |
| KR1020177024696A KR102057136B1 (en) | 2015-02-02 | 2015-06-30 | Electromagnetic heating control circuit and electromagnetic heating device |
| US15/665,044 US10638551B2 (en) | 2015-02-02 | 2017-07-31 | Electromagnetic heating control circuit and electromagnetic heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520077828.7U CN204362014U (en) | 2015-02-03 | 2015-02-03 | Drive circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN204362014U true CN204362014U (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520077828.7U Active CN204362014U (en) | 2015-02-02 | 2015-02-03 | Drive circuit and electronic equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016123897A1 (en) * | 2015-02-02 | 2016-08-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control circuit and electromagnetic heating device |
| CN105991116A (en) * | 2015-02-03 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit and electronic apparatus |
| CN109193572A (en) * | 2018-10-11 | 2019-01-11 | 四川长虹电器股份有限公司 | The protection control method of IGBT |
-
2015
- 2015-02-03 CN CN201520077828.7U patent/CN204362014U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016123897A1 (en) * | 2015-02-02 | 2016-08-11 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating control circuit and electromagnetic heating device |
| US10638551B2 (en) | 2015-02-02 | 2020-04-28 | Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Ltd | Electromagnetic heating control circuit and electromagnetic heating device |
| CN105991116A (en) * | 2015-02-03 | 2016-10-05 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit and electronic apparatus |
| CN105991116B (en) * | 2015-02-03 | 2019-09-20 | 佛山市顺德区美的电热电器制造有限公司 | Driving circuit and electronic equipment |
| CN109193572A (en) * | 2018-10-11 | 2019-01-11 | 四川长虹电器股份有限公司 | The protection control method of IGBT |
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