CN208782462U - A kind of IGBT short-circuit protection circuit - Google Patents
A kind of IGBT short-circuit protection circuit Download PDFInfo
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- CN208782462U CN208782462U CN201821590138.1U CN201821590138U CN208782462U CN 208782462 U CN208782462 U CN 208782462U CN 201821590138 U CN201821590138 U CN 201821590138U CN 208782462 U CN208782462 U CN 208782462U
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Abstract
A kind of IGBT short-circuit protection circuit, it is therefore an objective to make up traditional short-circuit protection circuit and there is the disadvantages of accidentally protecting situation, protected mode is single, protection is unable to quick response.The utility model is comprehensive by overcurrent protection and excess voltage protection, and uses a kind of response speed of improved signal deteching circuit to promote protection circuit, and protection circuit includes current sensor, detects main circuit short circuit currents；Voltage sensor detects the conduction voltage drop of IGBT；Overcurrent protection circuit, the overcurrent protection circuit on the basis of electric current；Excess voltage protection, the excess voltage protection on the basis of the conduction voltage drop of electronic component.The shortcomings that the design considers short-circuit protection circuit there are slow motions, and use a kind of improved hardware protection circuit, to implementing more quick, accurate short-circuit protection in electronic component application.
Description
Technical field
The utility model relates to the overcurrent of IGBT pipe and short-circuit protection, especially a kind of IGBT short-circuit protection circuit.
Background technique
What IGBT needed important consideration in practical applications is exactly some short-circuit protection.In practical applications, electronic component needs
Work is under rated current, once short-circuit, the high short circuit current of electronic component can generate high heat, and electronic component is often
Since high temperature for a short time amount fails beyond the electronic component limit.Therefore, quickly short circuit inspection is needed in power electronic element application
Survey and defencive function.
There are many different short-circuit modes for power electronic element, wherein the most serious, one is bridgc arm shorts, this
Under short-circuit mode, electric current is risen rapidly, while electronic component directly bears busbar voltage, and electronic component will generate very big heat
Amount.Short circuit current is positively correlated with gate voltage, and gate voltage is higher, and electric current when short-circuit is just bigger.Generally for power electricity
The short-circuit protection response time of subcomponent must be fast, it is necessary to complete in 10us.
At present there are four types of common several guard methods of short-circuit detecting, respectively detection drain electrode or collector current, detection is full
And pressure drop, di/dt is monitored, gate charge characteristic is detected.It is the most direct to detect electric current.Under on state, the detection of saturation voltage drop
The regular hour is needed to place false triggering.The method for detecting current changing rate depends on parasitic inductance LeE.
Current detecting protection generally exports electric current using during the method detection of shunt resistance, judges over current fault, and nothing is prolonged
Late, circuit is simple, at low cost.But detection circuit is not isolated with main circuit.General isolation current sensor needs independent
There is also bigger differences for power supply, response speed and accuracy.Suitable current detecting source is selected to be even more important.
Under short-circuit condition, the pressure drop of electronic component both ends rises very rapidly up to busbar voltage, therefore saturation voltage drop is the one of short circuit
A distinguishing mark.It is an effective method using saturation voltage drop detection short circuit.But saturation voltage drop detection must rationally be set
It counts circuit and the blanking time is set, realize and quickly protect and reduce protection circuit false triggering probability.
Utility model content
In order to solve above-mentioned problems of the prior art, the utility model provides a kind of IGBT short-circuit protection circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of IGBT short-circuit protection circuit, described
Voltage protection circuit and the comprehensive connection of current protecting circuit are circulated modified RS latch electricity by IGBT short-circuit protection circuit
Road；It include: current sensor, detection main circuit short circuit currents and detection electronic component export electric current；Current sampling is compared with
Circuit, the protection value of settable short circuit current, when sampling current value is greater than the set value, the short-circuit signal of circuit output high level
AL2；Saturation voltage drop sampling and comparison circuit, the protection value of settable saturation voltage drop, when sampling voltage value is greater than the set value, circuit
The short-circuit signal AL1 of high level is exported, pressure drop sampling adds series resistance to divide mode using Zener diode, and Zener diode is adopted
It is connected with single tube or multitube；Sample resistance parallel connection small capacitances, C1 is 10nF in voltage sample circuit；Ann reset circuit is used
Alarm signal, circuit input high level are resetted after short-circuit alarming, circuit can reset, and police instruction is closed；Institute
Police instruction is stated using buzzer warning；Driving signal synchronous circuit, for short-circuit protection movement synchronize, synchronization signal use with
The synchronous signal of electronic component grid voltage, to guarantee the quick and accuracy of short-circuit protection；Short-circuit protection logical action circuit,
Protection signal is generated according to overcurrent or short-circuit signal, virtual protection circuit is real using the Digital Logic such as S/R latch gate circuit
Existing fast short-circuit protective；Voltage sensor detects the conduction voltage drop of IGBT；Overcurrent protection circuit, the mistake on the basis of electric current
Current protecting circuit；Excess voltage protection, the excess voltage protection on the basis of the conduction voltage drop of electronic component.
The utility model compared to the prior art, the advantage is that: the utility model protects overcurrent protection and overvoltage
Protection circuit is comprehensive, and uses a kind of response speed of improved signal deteching circuit to promote protection circuit, it is therefore an objective to more
It mends traditional short-circuit protection circuit and there is the disadvantages of accidentally protecting situation, protected mode is single, protection is unable to quick response.Protection electricity
Road includes current sensor, detects main circuit short circuit currents；Voltage sensor detects the conduction voltage drop of IGBT；Over current protection
Protection circuit, the overcurrent protection circuit on the basis of electric current；Excess voltage protection, on the basis of the conduction voltage drop of electronic component
Excess voltage protection.The shortcomings that the design considers short-circuit protection circuit there are slow motions, and using a kind of improved hard
Part protect circuit, to electronic component application in implement more quick, accurate short-circuit protection.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is short-circuit protection detection and guard method schematic diagram；
Fig. 2 is short-circuit protection short path principle figure；
Fig. 3 is electronic component output current sampling comparison circuit schematic diagram；
Fig. 4 is saturation voltage drop sampling and comparison circuit schematic diagram；
Fig. 5 is ann reset circuit diagram；
Fig. 6 is driving signal synchronous circuit schematic diagram；
Fig. 7 is short-circuit protection logical action circuit diagram.
Specific embodiment
Exemplary embodiment disclosed by the utility model is more fully described below with reference to accompanying drawings, these embodiments be for
It can thoroughly understand the utility model, and range disclosed by the utility model can be communicated completely to this field
Technical staff.Although showing exemplary embodiment disclosed by the utility model in attached drawing, it being understood, however, that this is practical new
Type and should not be limited by the embodiments set forth herein.
In the description of the present invention, it should be understood that term " longitudinal direction ", " transverse direction ", "upper", "lower", " preceding ",
The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" be based on
Orientation or positional relationship shown in the drawings is merely for convenience of description the utility model, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.
In addition, term " first ", " second ", " third " etc. are used for description purposes only, it is not understood to indicate or imply
Relative importance.Meanwhile in the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " company
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, it can also be indirectly connected through an intermediary.For this field
Those of ordinary skill for, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
A kind of IGBT short-circuit protection circuit, the IGBT short-circuit protection circuit is by voltage protection circuit and current protecting circuit
Comprehensive connection, and circulate modified RS latch circuit；Include:
Current sensor, detection main circuit short circuit currents and detection electronic component export electric current；The current sensor
Passive PEARSON current sensor, corresponding bandwidth 10mhz or more are selected, rate of descent is less than 0.1/us；
Current sampling and comparison circuit, the protection value of settable short circuit current, when sampling current value is greater than the set value, circuit
Export the short-circuit signal AL2 of high level；
Saturation voltage drop sampling and comparison circuit, the protection value of settable saturation voltage drop, when sampling voltage value is greater than the set value,
The short-circuit signal AL1 of circuit output high level, pressure drop sampling add series resistance to divide mode, two pole of Zener using Zener diode
Pipe is connected using single tube or multitube；Sample resistance parallel connection small capacitances, C1 is 10nF in voltage sample circuit；
Ann reset circuit, for resetting alarm signal, circuit input high level after short-circuit alarming, circuit is
It can reset, police instruction is closed；The police instruction uses buzzer warning；
Driving signal synchronous circuit is synchronized for short-circuit protection movement, and synchronization signal uses and electronic component grid voltage
Synchronous signal, to guarantee the quick and accuracy of short-circuit protection；
Short-circuit protection logical action circuit generates protection signal, virtual protection circuit according to overcurrent or short-circuit signal
Fast short-circuit protective is realized using the Digital Logic gate circuit such as S/R latch；
Voltage sensor detects the conduction voltage drop of IGBT；
Overcurrent protection circuit, the overcurrent protection circuit on the basis of electric current；
Excess voltage protection, the excess voltage protection on the basis of the conduction voltage drop of electronic component.
As shown in figure 3, resistance R1 is current sampling resistor in the current sampling and comparison circuit, current sensor will
Current signal Ie is converted into voltage signal, gives comparator through input resistance R2, capacitor C1 is input filter capacitor, and Z1 is with Z2
15V voltage-stabiliser tube limits comparator input voltage, and RW1 sets setting value with resistance R3, is given comparator
It is compared with current sampling value.Comparator output signal is transferred to Q1 grid through resistance R4, resistance R5, resistance R6.Overcurrent letter
Number AL2 passes through collector output resistance R7, resistance R8 and exports.Under normal condition, AL2 exports high level, once device output electricity
Stream is greater than the set value, and comparator will export high level (+15V), and triode Q1 will be connected, and AL2 state will be transformed by high level
Low level.
As shown in figure 4, the saturation voltage drop sampling is with comparison circuit, Vc is element collector voltage signal, and D is Zener
Diode, resistance R are voltage sampling resistor.Resistance R1, capacitor C1 are input filter circuit, and Z1 and Z2 are 15V voltage-stabiliser tube, comparison
Limited compared with device input voltage, RW1 sets setting value with resistance R3, given comparator and current sampling value into
Row compares.Comparator output signal is transferred to Q1 grid through resistance R4, resistance R5, resistance R6.Over-voltage signal AL1 passes through collector
Output resistance R7, resistance R8 output.Saturation voltage drop very little under normal condition, generally several volts, diode D are in off-state, sampling
Voltage is 0V, and AL1 is high level.Once device saturation voltage drop is greater than the set value, diode D will be in reverse breakdown off-state, take
Sample voltage will be risen to fixed value (depending on Zener diode D parameter) by 0V, and sampling voltage will be greater than setting value, and comparator will
It exports high level (+15V), triode Q1 will be connected, and AL2 state will be transformed into low level by high level.
As shown in figure 5 ,+15V and IGND are power supply signal, and FW is reset signal in the ann reset circuit, letter is resetted
Number Q2 grid is given through resistance R12, resistance R13, resistance R14, Z5 is that reset signal voltage limits diode.Resistance R15 is light
The input of coupler 4N25 drives resistance, and Q2 switch state controls the output of reset signal, and Z6 is voltage steering diode, transmission
Reset signal.When reset signal input terminal FW is high level, Q2 conducting, 4N25 input terminal generates driving current conducting, resets
Signal is pulled down to low level by Z6.
As shown in fig. 6 ,+15V2 and IGND2 are power supply signal, and SYN is that driving synchronizes in the driving signal synchronous circuit
Signal, driving synchronization signal give Q3 grid through resistance R17, resistance R18, resistance R19, and Z4 is driving synchronization signal voltage limit
Diode.The input that resistance R16 is photo-coupler 6N137 drives resistance, and Q3 switch state controls the output of reset signal, resistance
The output signal that R21 is photo-coupler 6N137 drives resistance, remaining is the power circuit of photo-coupler 6N137.The synchronous letter of driving
Number SYN control device grid open and cut-off signals, when driving synchronous signal input end SYN is high level, Q3 conducting,
6N137 input terminal generates driving current conducting, and driving synchronization signal is pulled down to low level, when driving synchronous signal input end
When SYN is low level, Q3 shutdown, 6N137 input terminal drives synchronization signal to be pulled down to height by resistance R21 without driving current
Level.
As shown in fig. 7, in the short-circuit protection logical action circuit, AL1 and AL2 it is non-be not over-voltage and over-current signal, pass through
Crossing nor gate 4001 will protect signal to send the S/R latch circuit being made of NAND gate MC14093A, MC14093B to, and U3A is defeated
Outlet output protection alarm signal, reset signal give latch circuit by resistance R22, resistance R24, and driving synchronization signal is logical
It crosses transmission resistance R29 and gives U3C input terminal in virtual protection circuit, signal is protected to give U3C input terminal through resistance R25, pass through
U3D output driving controls signal, and resistance R23, capacitor C4 are reset signal input filter element, and capacitor C6 is driving synchronization signal
Input filter capacitor, capacitor C5 are power filtering capacitor.When proper device operation, AL1 and AL2 are all level, alarm signal
Output is low level, and alarm module does not work；Driving control signal and driving synchronization signal are synchronous always, i.e. same-phase.Work as device
When part overcurrent or short circuit, one of AL1, AL2 ratio are high level, and the output of logical action circuit alarm is converted to high level, alarms
Module work, while U3C output is converted to low level by high level under normal condition, driving synchronization signal is protected always by U3B
Low level is held, driving control signal keeps level.It when reset signal FW is high level, resets, alarms by latch circuit
Signal exports low level, and alarm module stops working, and driving control signal keeps synchronous with driving synchronization signal again.
Embodiment
The utility model aim is the short circuit curve for comprehensively considering IGBT pipe, provides a kind of improved IGBT short-circuit protection electricity
Road protects circuit and uses optically coupled isolation circuit, promotes electrical isolation effect.
IGBT short-circuit protection circuit, including by current sensor, saturation voltage sample circuit, short-circuit protection circuit, comprising:
Current sensor, for detecting electronic component output electric current, current sensor selects passive PEARSON current sense
Device, corresponding bandwidth 10mhz or more, rate of descent are less than 0.1/us.
Saturation voltage drop sampling and comparison circuit, the protection value of settable saturation voltage drop, when sampling voltage value is greater than the set value,
The short-circuit signal AL1 of circuit output high level, pressure drop sampling add series resistance to divide mode, two pole of Zener using Zener diode
Pipe is connected using single tube or multitube；The reasonable blanking time is arranged in spike when in order to avoid voltage sampling, can be in sample resistance
Small capacitances in parallel achieve the goal, i.e., C1 is 10nF in voltage sample circuit.
Current sampling and comparison circuit, the protection value of settable short circuit current, when sampling current value is greater than the set value, circuit
Export the short-circuit signal AL2 of high level.
Ann reset circuit, for resetting alarm signal, circuit input high level after short-circuit alarming, circuit is
It can reset, police instruction is closed, and police instruction uses buzzer warning herein.
Driving signal synchronous circuit is synchronized for short-circuit protection movement, and synchronization signal uses and electronic component grid voltage
Synchronous signal is to guarantee the quick and accuracy of short-circuit protection.
Short-circuit protection logical action circuit generates protection signal, virtual protection electricity according to overcurrent or short-circuit signal
Road fast short-circuit protective is realized using Digital Logic gate circuits such as S/R latches.
By taking first kind short circuit as an example, under IGBT normal operating conditions, the RW1 current potential in voltage and current sampling circuit is adjusted
Device can set corresponding protection value, and current signal is transmitted to comparison circuit by sample resistance by current sensor, same to be saturated
Pressure drop is also transmitted to voltage comparator circuit.When electronic component is not short-circuit, electric current is less than protection value, and saturation voltage drop sampling input is 0, electricity
The output of current voltage comparison circuit is height, i.e. over-current signal AL1 and AL2 output are+15V, short-circuit protection logical action circuit
Middle alarm signal output is low.
Driving signal synchronous circuit exports normal driving signal, and 5 feet of U3B, which input, in short-circuit protection logical action circuit is
Height, driving signal synchronous circuit output driving control signal follow driving synchronization signal variation, and electronic component is in normal condition,
And protection circuit is not operating.
When circuit or electronic component failure cause electronic component short-circuit, current spikes rise, current sampling circuit
Input moment increases above setting value, and output overcurrent signal AL2 is high level.Electronic component saturation voltage drop moment rises to simultaneously
Busbar voltage, voltage sample circuit input both end voltage and rise, Zener diode reverse breakdown, and saturation voltage drop sampling input maintains
In fixed value and it is greater than protection value, output overvoltage signal AL1 is high level.When AL1 or AL2 is high level, short-circuit protection
The 5 feet input of U3B is low in logical action circuit, and it is low level that driving signal synchronous circuit output driving, which controls signal output,
Realize the shutdown to gate pole driving control signal, while alarm signal output is low, warning circuit work in logical action circuit
Make.Work as trouble shooting, reset circuit input high level, alarm signal output is low, alarm in short-circuit protection logical action circuit
Circuit stops working.
Although the various embodiments described above are described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications can be made to these embodiments, so the foregoing is merely the realities of the utility model
Example is applied, the scope of patent protection of the utility model is not intended to limit, it is all to utilize the utility model specification and accompanying drawing content
Made equivalent structure or equivalent flow shift, is applied directly or indirectly in other relevant technical fields, and similarly includes
Within the scope of patent protection of the utility model.
Claims (7)
1. a kind of IGBT short-circuit protection circuit, which is characterized in that the IGBT short-circuit protection circuit by voltage protection circuit and electricity
Stream protection circuit synthesis connection, and circulate modified RS latch circuit；Include:
Current sensor, detection main circuit short circuit currents and detection electronic component export electric current；
Current sampling and comparison circuit, the protection value of settable short circuit current, when sampling current value is greater than the set value, circuit output
The short-circuit signal AL2 of high level；
Saturation voltage drop sampling and comparison circuit, the protection value of settable saturation voltage drop, when sampling voltage value is greater than the set value, circuit
The short-circuit signal AL1 of high level is exported, pressure drop sampling adds series resistance to divide mode using Zener diode, and Zener diode is adopted
It is connected with single tube or multitube；Sample resistance parallel connection small capacitances, C1 is 10nF in voltage sample circuit；
Ann reset circuit, for resetting alarm signal, circuit input high level after short-circuit alarming, circuit can be answered
Position, police instruction are closed；The police instruction uses buzzer warning；
Driving signal synchronous circuit is synchronized for short-circuit protection movement, and synchronization signal is using synchronous with electronic component grid voltage
Signal, to guarantee the quick and accuracy of short-circuit protection；
Short-circuit protection logical action circuit generates protection signal according to overcurrent or short-circuit signal, and virtual protection circuit uses
The Digital Logic gate circuit such as S/R latch realizes fast short-circuit protective；
Voltage sensor detects the conduction voltage drop of IGBT；
Overcurrent protection circuit, the overcurrent protection circuit on the basis of electric current；
Excess voltage protection, the excess voltage protection on the basis of the conduction voltage drop of electronic component.
2. IGBT short-circuit protection circuit according to claim 1, it is characterised in that；The current sensor is selected passive
PEARSON current sensor, corresponding bandwidth 10MHz or more, rate of descent are less than 1%/ms.
3. IGBT short-circuit protection circuit according to claim 1, it is characterised in that；The current sampling and comparison circuit
In, R1 is current sampling resistor, and current signal Ie is converted voltage signal by current sensor, gives and compares through input resistance R2
Device；C1 is input filter capacitor, and Z1 and Z2 are 15V voltage-stabiliser tube, is limited to comparator input voltage, RW1 with R3 pairs of resistance
Setting value is set, and is given comparator and is compared with current sampling value；Comparator output signal is through resistance R4, resistance
R5, resistance R6 are transferred to Q1 grid；Over-current signal AL2 is exported by collector output resistance R7, resistance R8.
4. IGBT short-circuit protection circuit according to claim 1, it is characterised in that；The saturation voltage drop sampling is electric compared with
Lu Zhong, Vc are element collector voltage signal, and D is Zener diode, and R is voltage sampling resistor；Resistance R1, capacitor C1 composition are defeated
Enter filter circuit；Z1 and Z2 is 15V voltage-stabiliser tube, is limited to comparator input voltage, and RW1 and resistance R3 carry out setting value
Setting, is given comparator and is compared with current sampling value；Comparator output signal is through resistance R4, resistance R5, resistance R6
It is transferred to Q1 grid；Over-voltage signal AL1 is exported by collector output resistance R7, resistance R8.
5. IGBT short-circuit protection circuit according to claim 1, it is characterised in that；In the ann reset circuit ,+15V
It is power supply signal with IGND, FW is reset signal, and reset signal gives Q2 grid, Z5 through resistance R12, resistance R13, resistance R14
Diode is limited for reset signal voltage；The input that resistance R15 is photo-coupler 4N25 drives resistance, and the control of Q2 switch state is multiple
The output of position signal, Z6 are voltage steering diode, transmit reset signal.
6. IGBT short-circuit protection circuit according to claim 1, it is characterised in that；In the driving signal synchronous circuit ,+
15V2 and IGND2 is power supply signal, and SYN is driving synchronization signal, drives synchronization signal through resistance R17, resistance R18, resistance R19
Q3 grid is given, Z4 is that driving synchronization signal voltage limits diode；The input that resistance R16 is photo-coupler 6N137 drives electricity
Resistance, Q3 switch state control the output of reset signal, and the output signal that resistance R21 is photo-coupler 6N137 drives resistance, remaining
For the power circuit of photo-coupler 6N137.
7. IGBT short-circuit protection circuit according to claim 1, it is characterised in that；The short-circuit protection logical action circuit
In, AL1 and AL2 it is non-not be over-voltage and over-current signal, by nor gate 4001 by protection signal send to by NAND gate
The S/R latch circuit of MC14093A, MC14093B composition, U3A output end output protection alarm signal, reset signal pass through electricity
Resistance R22, resistance R24 give latch circuit, and driving synchronization signal gives U3C in virtual protection circuit by transmitting resistance R29
Input terminal protects signal to give U3C input terminal through resistance R25, controls signal, resistance R23, capacitor C4 by U3D output driving
For reset signal input filter element, capacitor C6 is driving synchronization signal input filter capacitor, and capacitor C5 is power filtering capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821590138.1U CN208782462U (en) | 2018-09-28 | 2018-09-28 | A kind of IGBT short-circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821590138.1U CN208782462U (en) | 2018-09-28 | 2018-09-28 | A kind of IGBT short-circuit protection circuit |
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| Publication Number | Publication Date |
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| CN208782462U true CN208782462U (en) | 2019-04-23 |
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|---|---|---|---|
| CN201821590138.1U Expired - Fee Related CN208782462U (en) | 2018-09-28 | 2018-09-28 | A kind of IGBT short-circuit protection circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110676817A (en) * | 2019-09-19 | 2020-01-10 | 江西精骏电控技术有限公司 | Low-cost design method for realizing upper bridge and lower bridge MOSFET conduction overcurrent detection and protection for low-speed vehicle |
| CN110676815A (en) * | 2019-09-23 | 2020-01-10 | 南京越博电驱动系统有限公司 | Vehicle, motor controller and overcurrent protection circuit |
| CN110768608A (en) * | 2019-11-12 | 2020-02-07 | 上海元城汽车技术有限公司 | Overcurrent protection device and electric automobile |
| CN111736054A (en) * | 2020-06-23 | 2020-10-02 | 中国南方电网有限责任公司超高压输电公司 | Test circuit for IGBT drive desaturation protection function and simulation test method thereof |
| CN112670955A (en) * | 2020-12-10 | 2021-04-16 | 合肥同智机电控制技术有限公司 | Motor relay protection device based on double N-channel IGBT series connection |
| US11519954B2 (en) | 2019-08-27 | 2022-12-06 | Analog Devices International Unlimited Company | Apparatus and method to achieve fast-fault detection on power semiconductor devices |
-
2018
- 2018-09-28 CN CN201821590138.1U patent/CN208782462U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11519954B2 (en) | 2019-08-27 | 2022-12-06 | Analog Devices International Unlimited Company | Apparatus and method to achieve fast-fault detection on power semiconductor devices |
| CN110676817A (en) * | 2019-09-19 | 2020-01-10 | 江西精骏电控技术有限公司 | Low-cost design method for realizing upper bridge and lower bridge MOSFET conduction overcurrent detection and protection for low-speed vehicle |
| CN110676815A (en) * | 2019-09-23 | 2020-01-10 | 南京越博电驱动系统有限公司 | Vehicle, motor controller and overcurrent protection circuit |
| CN110768608A (en) * | 2019-11-12 | 2020-02-07 | 上海元城汽车技术有限公司 | Overcurrent protection device and electric automobile |
| CN111736054A (en) * | 2020-06-23 | 2020-10-02 | 中国南方电网有限责任公司超高压输电公司 | Test circuit for IGBT drive desaturation protection function and simulation test method thereof |
| CN111736054B (en) * | 2020-06-23 | 2022-09-16 | 中国南方电网有限责任公司超高压输电公司 | Test circuit for IGBT drive desaturation protection function and simulation test method thereof |
| CN112670955A (en) * | 2020-12-10 | 2021-04-16 | 合肥同智机电控制技术有限公司 | Motor relay protection device based on double N-channel IGBT series connection |
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Granted publication date: 20190423 Termination date: 20190928 |