CN106130520A - IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit - Google Patents
IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit Download PDFInfo
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- CN106130520A CN106130520A CN201610436428.XA CN201610436428A CN106130520A CN 106130520 A CN106130520 A CN 106130520A CN 201610436428 A CN201610436428 A CN 201610436428A CN 106130520 A CN106130520 A CN 106130520A
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- igbt
- electric current
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- circuit
- circuit protection
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0828—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in composite switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
Abstract
The present invention provides a kind of IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit.Described IGBT short-circuit protection circuit, including: drive current detecting unit, flow through the driving electric current of IGBT grid for detection；Comparing unit, for this driving electric current and a reference current being compared, and exports comparative result；And protected location, for determining whether to start the short-circuit protection to IGBT according to described comparative result.According to the such scheme of the present invention, the electric current that drives being flowed through IGBT by detection controls the self-locking of IGBT drive circuit, to improve the reliability of the short-circuit protection to IGBT.
Description
Technical field
The present invention relates to circuit engineering field, particularly relate to a kind of IGBT short-circuit protection circuit and method, IGBT driver
And IGBT circuit.
Background technology
IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) by MOSFET and
Bipolar transistor is composited, the advantage of it is warm both devices, had both had MOSFET element and has driven simple and quickly
Advantage, there is again the advantage that bipolar device capacity is big, thus, obtained more and more extensive in current power electronic technology
Application.But, can the various defencive functions of the driver of IGBT be the most feasible, perfect, close the most in time
IGBT, determines the life-span that IGBT uses to a certain extent.
The short-circuit protection of conventional IGBT driver is by carrying out voltage detecting, i.e. to the colelctor electrode CE end of IGBT when opening
Detection grid voltage Vce (sat).When normally working, Vce (sat) value about about 2V, do not reach short-circuit protection threshold value.Work as generation
During short circuit, owing to flowing through electric current (i.e. Ic) Rapid Variable Design of colelctor electrode, Vce (sat) is caused to rise, until it reaches short-circuit protection threshold
Value.Self-lock protection is implemented by the signal processing circuit of IGBT driver.
But in this method, due to operating current more than 2 times of rated current time, the external characteristic curve of IGBT be qualitative not
Quantitative, also it is not up to short-circuit protection threshold value, protection when some abnormal conditions causes short circuit current very big it is possible that can exist
Be failure to actuate, i.e. short-circuit protection lost efficacy, thus damaged IGBT.Further, when short-circuit loop inductance value is excessive, current changing rate
Just become is the lowest, is not the most short circuit, but crosses stream, and this situation short-circuit protection is also by ineffective.
Summary of the invention
In view of this, the present invention provides a kind of IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit,
The short-circuit protection to IGBT can be realized more reliably.
According to the first aspect of the invention, it is provided that a kind of IGBT short-circuit protection circuit, including: drive current detecting unit,
The driving electric current of IGBT grid is flowed through for detection；Comparing unit, for this driving electric current and a reference current are compared,
And export comparative result；And protected location, for determining whether to start the short-circuit protection to IGBT according to described comparative result.
Further, described comparing unit includes that reference current provides unit and comparator；Described reference current provides single
Unit is used for providing described reference current, and described comparator is used for comparing described driving electric current and described reference current, and
Output comparative result.
Further, described reference current provides unit to be a memory element, is used for storing described reference current, it is provided that give
Described comparator.
Further, described reference current is the maximum driving electric current under normally working according to IGBT or IGBT driving
Last driving electric current when device normally works.
Further, when described reference current is the maximum driving electric current under normally working according to IGBT, if ratio
The described comparative result of relatively unit output shows that the described driving electric current detected exceedes described reference current, and the most described protection is single
Unit starts short-circuit protection；
When described reference current be IGBT driver normally work time last drive electric current time, if comparative result shows
The described driving electric current detected exceedes the described last electric current preset range that drives, and the startup short circuit of the most described protected location is protected
Protect.
Further, described protected location includes switching switch, when protected location determines startup according to described comparative result
During IGBT short-circuit protection, close pwm pulse by disconnecting described switching switch, thus close IGBT.
According to the second aspect of the invention, it is provided that a kind of IGBT driver, including driver element；And any of the above-described item
Described IGBT short-circuit protection circuit.
Further, described driver element is that the push-pull type that the grid with IGBT is connected promotes level.
According to the third aspect of the invention we, it is provided that a kind of IGBT circuit, including IGBT；And described in any of the above-described item
IGBT driver.
Further, described IGBT circuit, also include IGBT resistance；Wherein, described driving current detecting unit
It is arranged between described driver element and described IGBT resistance.
According to the fourth aspect of the invention, it is provided that a kind of IGBT short-circuit protection method, including: drive current detection step,
Detection flows through the driving electric current of the grid of IGBT；Comparison step, compares this driving electric current and a reference current, and exports
Comparative result；And protection step, determine whether to start the short-circuit protection to IGBT according to described comparative result.
Further, described comparison step includes that reference current provides step and compares sub-step；Described reference current carries
For step, it is provided that described reference current；Described compare sub-step, described driving electric current and described reference current compared,
And export comparative result.
Further, when driver is properly functioning, samples and preserve the value of described driving electric current, IGBT once opens
Drive electric current and described sampling the value of described driving electric current preserved by detect time logical, i.e. described last drive electricity
Stream compares, and exports result of the comparison.
Further, if comparative result shows that the described driving electric current detected exceedes described last driving electric current and makes a reservation for
Scope, then show that IGBT occurs abnormal, the most now in protected location step, starts short-circuit protection.
According to the such scheme of the present invention, by detection flow through IGBT drive electric current control IGBT drive circuit from
Lock, to realize the short-circuit protection to IGBT.So, flowed through the driving electric current of IGBT grid by detection, solve prior art
In scheme that the protection of high-power IGBT module short circuit can only be caused by the detection electric current of IGBT forceful electric power end colelctor electrode single
Problem, and owing to the sampled point of short-circuit protection is not provided with the forceful electric power end of IGBT, thus avoid the mixing of driver strong, weak electricity
Situation, eliminate to controller exist potential safety hazard.Further, lost efficacy at short-circuit protection or excessively flowed non-shorting state
Time, the reliability of IGBT short-circuit protection is unaffected, and i.e. improves the reliability of short-circuit protection.
Below in conjunction with the drawings and the specific embodiments, technical scheme is further detailed description, the present invention
Beneficial effect will be further appreciated.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, is used for
Explain the present invention, be not intended that inappropriate limitation of the present invention.
Fig. 1 shows the structured flowchart being preferable to carry out IGBT short-circuit protection circuit according to the present invention one.
Fig. 2 is the structural representation of the IGBT circuit according to one embodiment of the present invention.
Fig. 3 is the flow chart of the IGBT short-circuit protection method being preferable to carry out according to the present invention one.
Fig. 4 is the FB(flow block) of the specific embodiment according to short-circuit protection method of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described by corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Before the circuit structure of the present invention is illustrated, first explain the operation principle of the present invention.If IGBT
Be short-circuited fault, and during the collector current Ic of IGBT rises, grid voltage Vge is also rising, and this is by Miller
Effect causes.And the change of grid voltage Vge when short circuit, cause gate charge amount Qg also to change accordingly, and
And then required driving electric current also can change.Now, by judging that driving the exception of electric current to increase or fluctuate i.e. can determine whether
The short circuit of IGBT module.Further, although some drivers are provided with excessive the having of collector voltage Vce suppressing to cause during short circuit
Source clamp circuit, but when this voltage Vce reaches specified clamp voltage, also to the grid injection current of IGBT, thus can cause
Drive the change of electric current, the most also can determine whether the short circuit of IGBT module.
Based on principles above, propose the solution of the present invention, below will be described in more detail.
First the composition that Fig. 1 illustrates the IGBT short-circuit protection circuit of the present invention is combined.Fig. 1 shows according to of the present invention
The structured flowchart of IGBT short-circuit protection circuit, as it is shown in figure 1, described IGBT short-circuit protection circuit P includes: drive current detecting list
Unit 1, comparing unit 2 and protected location 3.Described driving current detecting unit 1 flows through the driving electric current of IGBT, tool for detection
Body ground, detection flows through the driving electric current of the grid of IGBT.Described comparing unit 2 is for entering this driving electric current and a reference current
Row compares, and exports comparative result.Described protected location 3 is short for determine whether to start to IGBT according to described comparative result
Road is protected, such as, control the driver self-locking of IGBT, to close IGBT.
According to the such scheme of the present invention, by detection flow through IGBT drive electric current control IGBT drive circuit from
Lock, to realize the short-circuit protection to IGBT.So, flowed through the driving electric current of IGBT grid by detection, solve prior art
In scheme that the protection of high-power IGBT module short circuit can only be caused by the detection electric current of IGBT forceful electric power end colelctor electrode single
Problem, and owing to the sampled point of short-circuit protection is not provided with the forceful electric power end of IGBT, thus avoid the mixing of driver strong, weak electricity
Situation, eliminate and controller existed potential safety hazard.Further, when short-circuit protection lost efficacy or excessively flowed non-shorting state,
The reliability of IGBT short-circuit protection is unaffected, and i.e. improves the reliability of short-circuit protection.
Hereinafter each ingredient of described protection circuit is illustrated one by one.
Described driving current detecting unit 1 flows through the driving electric current of IGBT for detection, and specifically, detection flows through IGBT's
The driving electric current of grid.This driving current detecting unit for example, ammeter etc. is capable of the element of current detecting.
Described comparing unit 2 is for comparing described driving electric current and a reference current, and exports comparative result.?
In one preferred embodiment, as it is shown in figure 1, described comparing unit 2 includes that reference current provides unit 21 and comparator 22.Described ginseng
Examining electric current provides unit 21 for providing described reference current, and described comparator 21 is for by described driving electric current and described reference
Electric current compares, and exports comparative result.In a specific embodiment, described reference current provides unit 21 to be a conduct
The memorizer of memory element or depositor, be used for storing described reference current, and be supplied to comparator 22.
In one embodiment, described reference current can be that the electric current that drives under normally working according to IGBT is arranged
Empirical value, for example, IGBT normally work under drive electric current maximum, or driver start after normally work the several seconds,
Gather and drive the maximum that goes out of electric current union, or be this maximum calculated value of adding an amount of redundancy gained again
Deng.If the described comparative result of comparing unit 2 output shows that the described driving electric current detected exceedes described reference current, then protect
Protect unit 3 and start short-circuit protection, such as, make driver carry out self-locking, to close IGBT.
In another embodiment, described reference current can also be stored in above-mentioned reference current provides in unit 21
Last driving electric current when driver normally works.Specifically, when driver is properly functioning, samples and preserve described driving
The value of electric current, drives electric current and described sampling the described driving electric current that preserves by detect when once opening on IGBT
Value, i.e. described last driving electric current compares, and exports result of the comparison.If it is described that comparative result shows to detect
Electric current is driven to exceed described last driving electric current preset range, this preset range, for example, one amount of redundancy, the institute i.e. detected
Stating driving electric current to compare and last drive electric current to have a larger increase, then show that IGBT occurs abnormal, the most now protected location 3 starts
Short-circuit protection, such as, make driver carry out self-locking, to close IGBT.If comparative result shows the described driving electric current detected
Exceed and described last drive the value of electric current in preset range, then show that exception does not occurs in IGBT, then protected location 3 does not starts
Short-circuit protection, provides unit 21 to store with reference to electric current and drives electric current accordingly, for comparison next time.
Described protected location 3 is for determining whether to start the short-circuit protection to IGBT according to described comparative result.Specifically,
If comparative result shows that IGBT occurs extremely, the described driving electric current such as detected exceedes described last driving electric current and makes a reservation for
Scope, then protected location 3 starts the short-circuit protection to IGBT, such as, control driver and carry out self-locking, thus close IGBT.No
Then, short-circuit protection is not started.
Further, the present invention provides a kind of IGBT driver.This IGBT driver includes driver element and above-mentioned IGBT
Short-circuit protection circuit.The push-pull type that the driver element of described IGBT driver is for example, connected with the grid of IGBT promotes level.
And further, the IGBT circuit according to the present invention is described.This IGBT circuit includes: IGBT and above-mentioned IGBT
Driver.Wherein, the driving current detecting unit 1 in the described IGBT short-circuit protection circuit of described IGBT driver is arranged on and drives
Between moving cell and the resistance of IGBT.
Below in conjunction with shown in Fig. 2 a specific embodiment, the IGBT circuit according to the present invention is described.As in figure 2 it is shown,
Described IGBT circuit includes IGBT and described IGBT driver.This IGBT driver includes driver element 4 and described
IGBT short-circuit protection circuit P.Described IGBT short-circuit protection circuit P then includes driving current detecting unit 1, comparing unit 2
(including that reference current provides unit 21, comparator 22) and protected location 3.Described driving current detecting unit 1 is used for detecting
The driving electric current that driver element 4 is provided, comparator 22 compares the driving electric current of this detection provides unit 21 to carry with reference current
The reference current of confession, exports comparative result.Protected location 3 starts short-circuit protection according to described comparative result, carries out IGBT driving
The self-locking of circuit, such as, shield described PMW pulse, juxtaposition low level, thus close described IGBT.Further, described IGBT
Circuit includes that resistance Rg, current detecting unit 1 are arranged between driver element 4 and this resistance Rg, is used for detecting stream
Cross the driving electric current of the grid of IGBT.
Below in conjunction with Fig. 3, the IGBT short-circuit protection method according to the present invention is described, as it is shown on figure 3, described method includes: drive
Streaming current detecting step S1, comparison step S2 and protection step S3.Described driving current detection step S1, detection flows through IGBT
Driving electric current, specifically, detection flows through the driving electric current of grid of IGBT.Described comparison step S2, by this driving electric current with
One reference current compares, and exports comparative result.Described protection step S3, determines whether to start according to described comparative result
Short-circuit protection to IGBT, such as, control the driver self-locking of IGBT, to close IGBT.
Described comparison step S2 in a preferred embodiment, provides step including reference current and compares sub-step.Described
Reference current provides step, and utilization such as stores as memorizer or the depositor of memory element and provides described with reference to electricity
Stream.Described compare sub-step, described driving electric current and described reference current are compared, and exports comparative result.
As described above, in one embodiment, described reference current can be the driving under normally working according to IGBT
Electric current and the empirical value that arranges, for example, IGBT normally work under the maximum driving electric current, or after driver starts
Normally work the several seconds, gather the maximum driving electric current union to go out, or be that this maximum calculated adds one again
The value etc. of amount of redundancy gained.If the described comparative result of comparison step S2 output shows that the described driving electric current detected exceedes institute
State reference current, then, in protection step S3, start short-circuit protection, such as, make driver carry out self-locking, to close IGBT.
In another embodiment, described reference current can also be to drive the driver preserved last time when normally working
Streaming current.Specifically, when driver is properly functioning, samples and preserve the value of described driving electric current, the most open-minded on IGBT
Time drive electric current and described sampling the value of described driving electric current preserved by detect, i.e. described last drive electric current
Compare, and export result of the comparison.If comparative result shows that the described driving electric current detected exceedes the described last time and drives
Streaming current preset range, this preset range, for example, one amount of redundancy, the described driving electric current i.e. detected compares last driving
Electric current has a larger increase, then show that IGBT occurs abnormal, the most now protection step S3, starts short-circuit protection, such as, make to drive
Device carries out self-locking, to close IGBT.If comparative result shows that the described driving electric current detected exceedes described last driving electricity
The value of stream in preset range, then shows that exception does not occurs in IGBT, then, in protection step S3, do not start short-circuit protection, join simultaneously
Examine electric current offer step stores and drive electric current accordingly, for comparison next time.
Fig. 4 shows the FB(flow block) of the specific embodiment according to short-circuit protection method of the present invention.Such as Fig. 4 institute
Show, as a example by the work process of the IGBT circuit shown in Fig. 2, the idiographic flow of short-circuit protection method this described is illustrated.
IGBT driver is run, and the most described short-circuit protection circuit enters duty.First storage normal drive current for the first time
Signal, and driving electric current hereafter of sampling further, the driving electric current i.e. detected.Further, by the driving electric current of this detection
Compare with the front driving electric current once stored, and judge to drive electric current whether to suddenly change or abnormal, if abnormal, then open and cut
Change and switch to block described pwm pulse, thus start IGBT short-circuit protection.
IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit to the present invention are retouched above
State.Flowed through the driving electric current of IGBT grid by detection, solve in prior art the protection of high-power IGBT module short circuit
The problem that the scheme that can be caused by the detection electric current of IGBT forceful electric power end colelctor electrode is single, and due to the sampling of short-circuit protection
Point is not provided with the forceful electric power end of IGBT, thus avoids the situation of driver strong, weak electricity mixing, eliminates and controller is existed safety
Hidden danger.Further, when short-circuit protection lost efficacy or excessively flowed non-shorting state, the reliability of IGBT short-circuit protection will not be by shadow
Ring, i.e. improve the reliability of short-circuit protection.
In sum, skilled addressee readily understands that, on the premise of not conflicting, above-mentioned each advantageous manner can
Freely to combine, superposition.
The above, be only presently preferred embodiments of the present invention, the present invention not makees any pro forma restriction, depends on
Any simple modification, equivalent variations and the modification made above example according to the technical spirit of the present invention, all still falls within this
In the range of bright technical scheme.
Claims (14)
1. an IGBT short-circuit protection circuit, it is characterised in that including:
Drive current detecting unit, flow through the driving electric current of IGBT grid for detection；
Comparing unit, for this driving electric current and a reference current being compared, and exports comparative result；And
Protected location, for determining whether to start the short-circuit protection to IGBT according to described comparative result.
2. IGBT short-circuit protection circuit as claimed in claim 1, it is characterised in that
Described comparing unit includes that reference current provides unit and comparator；Described reference current provides unit to be used for providing described
Reference current, described comparator is for comparing described driving electric current and described reference current, and exports comparative result.
3. IGBT short-circuit protection circuit as claimed in claim 2, it is characterised in that
Described reference current provides unit to be a memory element, is used for storing described reference current, it is provided that to described comparator.
4. IGBT short-circuit protection circuit as claimed in claim 2 or claim 3, it is characterised in that
Described reference current be under normally working according to IGBT when driving the maximum of electric current or IGBT driver normally to work
Last drive electric current.
5. IGBT short-circuit protection circuit as claimed in claim 4, it is characterised in that
When described reference current is the maximum driving electric current under normally working according to IGBT, if the institute of comparing unit output
Stating the described driving electric current that comparative result shows to detect and exceed described reference current, the most described protected location starts short circuit to be protected
Protect；
When described reference current be IGBT driver normally work time last drive electric current time, if comparative result shows detection
To described driving electric current exceed and described last drive electric current preset range, the most described protected location starts short-circuit protection.
6. the IGBT short-circuit protection circuit as described in any one of claim 1-5, it is characterised in that
Described protected location includes switching switch, when protected location determines startup IGBT short-circuit protection according to described comparative result
Time, close pwm pulse by disconnecting described switching switch, thus close IGBT.
7. an IGBT driver, it is characterised in that including:
Driver element；And the IGBT short-circuit protection circuit described in any one of claim 1-6.
8. IGBT driver as claimed in claim 7, it is characterised in that
Described driver element is that the push-pull type that the grid with IGBT is connected promotes level.
9. an IGBT circuit, it is characterised in that including:
IGBT；And
IGBT driver as claimed in claim 7 or 8.
10. IGBT circuit as claimed in claim 9, it is characterised in that also include IGBT resistance；
Wherein, described driving current detecting unit is arranged between described driver element and described IGBT resistance.
11. 1 kinds of IGBT short-circuit protection methods, it is characterised in that including:
Current detection step, detection is driven to flow through the driving electric current of the grid of IGBT；
Comparison step, compares this driving electric current and a reference current, and exports comparative result；And
Protection step, determines whether to start the short-circuit protection to IGBT according to described comparative result.
12. methods as claimed in claim 11, it is characterised in that
Described comparison step includes that reference current provides step and compares sub-step；Described reference current provides step, it is provided that institute
State reference current；Described compare sub-step, described driving electric current and described reference current are compared, and export and compare knot
Really.
13. methods as described in claim 11 or 12, it is characterised in that
When driver is properly functioning, samples and preserve the value of described driving electric current, will detect when IGBT once opens
Drive electric current and described sampling the value of described driving electric current preserved, i.e. described last drive electric current to compare,
And export result of the comparison.
14. methods as claimed in claim 13, it is characterised in that
If comparative result shows that the described driving electric current detected exceedes described last driving electric current preset range, then show
IGBT occurs abnormal, the most now in protected location step, starts short-circuit protection.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610436428.XA CN106130520A (en) | 2016-06-17 | 2016-06-17 | IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit |
| PCT/CN2017/080694 WO2017215335A1 (en) | 2016-06-17 | 2017-04-17 | Igbt short-circuit protection circuit and method, igbt driver and igbt circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610436428.XA CN106130520A (en) | 2016-06-17 | 2016-06-17 | IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit |
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| CN106130520A true CN106130520A (en) | 2016-11-16 |
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| CN201610436428.XA Pending CN106130520A (en) | 2016-06-17 | 2016-06-17 | IGBT short-circuit protection circuit and method, IGBT driver and IGBT circuit |
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| WO (1) | WO2017215335A1 (en) |
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| WO2017215335A1 (en) * | 2016-06-17 | 2017-12-21 | 珠海格力电器股份有限公司 | Igbt short-circuit protection circuit and method, igbt driver and igbt circuit |
| CN108235481A (en) * | 2016-12-22 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | A kind of guard method of IGBT collector voltages, device and electromagnetic oven based on power input voltage |
| CN108666981A (en) * | 2017-03-28 | 2018-10-16 | 中国科学院上海微系统与信息技术研究所 | A kind of IGBT current foldback circuits and method |
| CN108872761A (en) * | 2017-05-11 | 2018-11-23 | 富士电机株式会社 | Short-circuit detecting device and the device for having short-circuit detecting device |
| CN112104346A (en) * | 2020-08-31 | 2020-12-18 | 电子科技大学 | IGBT high-voltage drive overcurrent and overvoltage protection circuit |
| CN112805654A (en) * | 2018-08-02 | 2021-05-14 | 德克萨斯仪器股份有限公司 | Miller clamp driver with feedback bias control |
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| RU195809U1 (en) * | 2019-03-20 | 2020-02-05 | Федеральное государственное унитарное предприятие Экспериментальный завод научного приборостроения со Специальным конструкторским бюро Российской академии наук | IGBT KEY CONTROL DIAGRAM FOR THE PRIMARY PART OF THE DRIVER Kernel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017215335A1 (en) * | 2016-06-17 | 2017-12-21 | 珠海格力电器股份有限公司 | Igbt short-circuit protection circuit and method, igbt driver and igbt circuit |
| CN108235481A (en) * | 2016-12-22 | 2018-06-29 | 佛山市顺德区美的电热电器制造有限公司 | A kind of guard method of IGBT collector voltages, device and electromagnetic oven based on power input voltage |
| CN108235481B (en) * | 2016-12-22 | 2021-03-30 | 佛山市顺德区美的电热电器制造有限公司 | IGBT collector voltage protection method and device based on power supply input voltage and induction cooker |
| CN108666981A (en) * | 2017-03-28 | 2018-10-16 | 中国科学院上海微系统与信息技术研究所 | A kind of IGBT current foldback circuits and method |
| CN108872761A (en) * | 2017-05-11 | 2018-11-23 | 富士电机株式会社 | Short-circuit detecting device and the device for having short-circuit detecting device |
| CN112805654A (en) * | 2018-08-02 | 2021-05-14 | 德克萨斯仪器股份有限公司 | Miller clamp driver with feedback bias control |
| CN112104346A (en) * | 2020-08-31 | 2020-12-18 | 电子科技大学 | IGBT high-voltage drive overcurrent and overvoltage protection circuit |
| CN112104346B (en) * | 2020-08-31 | 2021-08-06 | 电子科技大学 | IGBT high-voltage drive overcurrent and overvoltage protection circuit |
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| WO2017215335A1 (en) | 2017-12-21 |
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Application publication date: 20161116 |