CN208143086U - Active clamp circuit and switching circuit - Google Patents
Active clamp circuit and switching circuit Download PDFInfo
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- CN208143086U CN208143086U CN201820144216.9U CN201820144216U CN208143086U CN 208143086 U CN208143086 U CN 208143086U CN 201820144216 U CN201820144216 U CN 201820144216U CN 208143086 U CN208143086 U CN 208143086U
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Abstract
The utility model discloses a kind of active clamp circuit and switching circuit, which includes：The clamper module that one end is used to connect with the collector of first switch tube and the control module being connect with the clamper module other end；The control module is also used to connect with the gate pole of the first switch tube, the voltage of emitter and inter-collector when for detecting first switch tube shutdown, and when the voltage is greater than or equal to voltage threshold and the duration is less than time threshold, controls the clamper module and clamper control is carried out to collector voltage.The active clamp circuit can carry out clamper control with the collector of switch tube, with protective switch pipe, and reduce the work times of active clamp circuit, avoid active clamp circuit from overheating because of frequent starting and burn.
Description
Technical field
The utility model relates to high power device technical field more particularly to a kind of active clamp circuits and switching circuit.
Background technique
In the application process of the high power devices such as photovoltaic DC-to-AC converter, there are biggish stray inductances for main circuit.It is switching
When managing (such as IGBT) shutdown, collector current rate of descent is higher, and stray inductance both ends induce electromotive force, direction and DC bus
Voltage is consistent, and the both ends of switching tube are superimposed upon together with DC bus, and collector-transmitting interpolar of switching tube is caused to generate wave
Gush voltage.Surge voltage is excessively high, more than switching tube specified collection emitter voltage when so that switching tube damage.
In high-power applications occasion, the method protected when switching tube shutdown moment generates surge voltage to it is,
Active-clamp protection is carried out using the clamp circuit switch tube of Transient Voltage Suppressor (TVS) composition.This method can be preferable
Ground inhibits surge voltage, and can solve the problem of short circuit occurs and driver short-circuit protection is caused to fail when switching tube turns off.
But the clamp circuit of Transient Voltage Suppressor (TVS) composition is easy to mislead, it is (non-in the Vce overtension of switching tube
The excessively high situation of Vce dynamic electric voltage), clamp circuit work, continually starting burns TVS pipe overheat even.
Utility model content
The utility model is intended to provide a kind of active clamp circuit and switching circuit.The active clamp circuit can detect
The current potential of the collector of switch tube carries out clamper protection when switching tube shutdown moment generates surge voltage, reduces active clamp electricity
The work times on road avoid active clamp circuit from overheating because of frequent starting and burn.
The utility model embodiment uses following technical scheme：
A kind of active clamp circuit, the current potential of the collector for controlling first switch tube, including clamper module and control
Module；For connecting with the collector, the other end is connect with the control module for one end of the clamper module；The control
Module is also used to connect with the gate pole of the first switch tube, emitter and current collection when for detecting first switch tube shutdown
The voltage of interpolar, and when the voltage is greater than or equal to voltage threshold and the duration is less than time threshold, control the pincers
Position module carries out clamper control to collector voltage.
The control module includes the first clamp diode and discharge loop in one of the embodiments,；Described first
The cathode of clamp diode is connect with the output end of the clamper module；The discharge loop and first clamp diode are simultaneously
Connection is used for first clamper when the voltage is greater than or equal to voltage threshold and the duration is less than the time threshold
Bypass diode.
The discharge loop includes capacitor and resistance in parallel in one of the embodiments,.
The control module includes the first clamp diode, second switch and controller in one of the embodiments,；
The cathode of first clamp diode is connect with the output end of the clamper module, and in parallel with the second switch；Institute
The control terminal for stating second switch is connect with the controller；The controller is used to detect the emitter of the first switch tube
With the voltage value of inter-collector, when the voltage value is greater than or equal to the voltage threshold and the duration is less than the time threshold
When value, the second switch conducting is controlled.
It in one of the embodiments, further include current-limiting resistance；The current-limiting resistance is serially connected in the clamper module and institute
It states between control module.
The clamper module includes the second clamp diode of multiple differential concatenations in one of the embodiments, described
The breakdown reverse voltage summation of second clamp diode is the voltage threshold.
First clamp diode and the second clamp diode are TVS pipe in one of the embodiments,.
It in one of the embodiments, further include third diode；Third diode one end and the control module
Connection, the other end with the gate pole for connecting.
The third diode is Zener diode in one of the embodiments,.
A kind of switching circuit, including active clamp circuit described in first switch tube and any of the above-described embodiment；Its
In, the control module is connect with the gate pole of the first switch tube, the current collection of the clamper module and the first switch tube
Pole connection.
Above-mentioned active clamp circuit and switching circuit detect first switch tube emitter and collector by control module
Between voltage, and be greater than or equal to voltage threshold and duration in the voltage of first switch tube emitter and inter-collector and be less than
When time threshold, clamper module is controlled, clamper control is carried out with the collector voltage to first switch tube.When first switch tube exists
When shutdown moment generates surge voltage, control module detects that the voltage of first switch tube emitter and inter-collector is greater than clamper
Point voltage (voltage threshold), and the voltage-duration be less than time surge voltage duration (time threshold) when, clamper
Module carries out clamper control to the collector of first switch tube, to protect first switch tube, and reduces the work of clamp circuit
Number avoids clamp circuit from overheating because of frequent starting and burns.
Detailed description of the invention
It, below will be to the utility model embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to the content of the utility model embodiment and these attached drawings.
Fig. 1 is the circuit diagram in a kind of conventional example of active clamp circuit provided by the utility model；
Fig. 2 is the circuit structure block diagram in an a kind of embodiment of active clamp circuit provided by the utility model；
Fig. 3 is the circuit diagram in an a kind of embodiment of active clamp circuit provided by the utility model；
Fig. 4 is the circuit diagram in a kind of another embodiment of active clamp circuit provided by the utility model.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality
Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
It is practical new to belong to this for those skilled in the art's every other embodiment obtained without making creative work
The range of type protection.
IGBT:(Insulated Gate Bipolar Transistor), insulated gate bipolar transistor is by BJT
The compound full-control type voltage driven type power semiconductor device of (double pole triode) and MOS (insulating gate type field effect tube) composition
Part has advantage of both the high input impedance of MOSFET pipe and the low conduction voltage drop of GTR pipe concurrently.GTR pipe saturation voltage drop is low, carries
Current density is big, but driving current is larger.MOSFET pipe driving power very little, switching speed is fast, but conduction voltage drop is big, and current-carrying is close
It spends small.IGBT pipe combines the advantages of both the above device, and driving power is small and saturation pressure reduces.IGBT pipe is (exhausted by IGBT
Edge grid bipolar transistor tube chip) with FWD (freewheeling diode chip) by specific circuit bridge encapsulation made of modularization
Semiconductor product.
NTC:Negative tempperature coefficient thermistor is a kind of sensor resistance that a kind of resistance value reduces with temperature increase.
It is widely used in various electronic original parts, such as the heater of temperature sensor, composite fuse and automatic adjustment.In this implementation
The effect of NTC mainly detects IGBT shell temperature in example, and the height of shell temperature is reflected by the size of resistance value.
TVS(Transient Voltage Suppressor):Also known as Transient Suppression Diode is one generally used
The new and effective circuit brake of kind, it has the response time (subnanosecond grade) being exceedingly fast and quite high surge absoption ability.
When its both ends are subjected to the high energy impact events of moment, TVS pipe can with high speed the impedance value between both ends by high impedance
Become Low ESR, to absorb an instantaneous large-current, its both end voltage strangulation one it is scheduled numerically, to protect
Subsequent circuit element is not by the impact of high voltage transient spike.
Fig. 1 is the circuit structure diagram of active clamp circuit in a conventional example.As shown in Figure 1, the active clamp circuit
For the active clamp circuit of 3.0MW (PCC) power.Active clamp circuit uses three TVS pipe differential concatenations, two of them TVS
The breakdown reverse voltage of pipe is 400V, and the breakdown reverse voltage of a TVS pipe is 480V, and active clamp point is 1280V.It feeds back
Third diode is passed through in circuit, i.e. VD pipe and TVS pipe access the gate pole of IGBT pipe, as shown in Figure 1.The active clamp circuit
Working principle be：When specific operation (short circuit, overload etc.) causes IGBT pipe to turn off, the collector potential of IGBT pipe is excessively high,
More than 1280V, the TVS pipe series circuit of differential concatenation is breakdown, has electric current to flow into the gate pole of IGBT pipe, the gate pole of IGBT pipe
Current potential is raised, to avoid the cut-off current of IGBT pipe excessively precipitous, and then reduces peak voltage.Since due to voltage spikes can only go out
Existing 100-300ns or so or even time are shorter, therefore it is required that the curent change of feedback loop must change more than collector potential
Fastly, collector potential can be just controlled, and the bandwidth of feedback loop must be high.
In traditional active clamp circuit, it is excessively high that Vce dynamic electric voltage does not occur in emitter-collector voltage of IGBT pipe
When, i.e., when there is not IGBT pipe shutdown moment generation surge voltage, active clamp circuit is easy to appear the phenomenon that misleads.When
When emitter-collector voltage of IGBT pipe is greater than the active clamp point voltage of clamp circuit, active clamp circuit work, frequently
Starting make TVS pipe overheat even burn, while by the gate pole of IGBT pipe puncture.
The utility model provides a kind of active clamp circuit, avoids active clamp circuit because mislead and frequent starting,
The work times for reducing active clamp circuit, to be protected to active clamp circuit.
As shown in Fig. 2, in one embodiment, which includes clamper module 100 and control module 200.Pincers
For connecting with the collector of first switch tube 10, the other end is connect with control module 200 for one end of position module 100.Control mould
The other end of block 200 is also used to connect with the gate pole of first switch tube 10.Control module 200 exists for detecting first switch tube 10
The voltage of emitter and inter-collector when shutdown, and it is greater than voltage in the voltage of the emitter of first switch tube 10 and inter-collector
When threshold value, and the duration be less than time threshold when, control clamper module 100.To first switch tube when clamper module 100 works
10 collector carries out clamper control, to carry out clamper protection to first switch tube 10.
Specifically, voltage threshold is the clamper point voltage of the collector of first switch tube 10.Time threshold is first switch
Pipe 10 generates due to voltage spikes duration when surge voltage when off.When first switch tube 10 generates wave in shutdown moment
When gushing voltage, control module 200 detects that the voltage of 10 emitter of first switch tube and inter-collector is greater than clamper point voltage, and
And the voltage-duration be less than the surge voltage due to voltage spikes duration when, collection of the clamper module 100 to first switch tube 10
Electrode carries out clamper control, to protect first switch tube 10, and reduces the work times of active clamp circuit, avoids active pincers
Position circuit because frequent starting and overheat and burn.
In one embodiment, clamper module 100 includes the second clamp diode of multiple differential concatenations.Multiple second clampers
The breakdown reverse voltage summation of diode is voltage threshold, i.e. the clamper point voltage of the collector of first switch tube 10.In this reality
It applies in example, the second clamp diode is TVS pipe.In a specific embodiment, as shown in figure 3, clamper module 100 includes
The TVS pipe of three differential concatenations, i.e. diode DZ1, diode DZ2, diode DZ3.The breakdown reverse voltage phase of each TVS pipe
Together.In other embodiments, it may also comprise the other kinds of clamp diode of Opposite direction connection in clamper module 100, such as the
Three diodes etc..The breakdown reverse voltage of clamp diode in clamper module 100 can not also be identical.It is anti-in clamper module 100
To the quantity of concatenated second clamp diode and the breakdown reverse voltage summation of the second clamp diode, opened according to first
Close the practical clamper point voltage setting of the collector of pipe 10.
In one embodiment, as shown in figure 3, control module 200 includes the first clamp diode DZ4 and discharge loop.The
One clamp diode DZ4 Opposite direction connection is into circuit.Discharge loop is in parallel with the first clamp diode DZ4.Discharge loop is used for
The emitter of first switch tube 10 and the voltage of inter-collector are greater than or equal to voltage threshold and the duration is less than time threshold
When by the first clamp diode bypass.In the present embodiment, discharge loop is used for emitter and current collection in first switch tube 10
The voltage of interpolar is greater than or equal to the clamper point voltage of the collector of first switch tube 10, and the voltage-duration is less than first
When 10 shutdown moment of switching tube generates the due to voltage spikes duration of surge voltage, the first clamp diode DZ4 is bypassed.?
In the present embodiment, discharge loop includes capacitor C1 and resistance R2 in parallel.The capacitance of capacitor C1 and the resistance value of resistance R2 are according to
One switching tube, 10 shutdown moment generates the due to voltage spikes duration setting of surge voltage, so that the discharge loop accurate judgement
Whether the first clamp diode DZ4 is bypassed, while 10 ontology of effective protection first switch tube.In the present embodiment, the first pincers
Position diode DZ4 is TVS pipe.In other embodiments, the first clamp diode DZ4 can also be other kinds of clamper two
Pole pipe.
As shown in figure 3, in one embodiment, active clamp circuit further includes current-limiting resistance R1.Current-limiting resistance R1 is serially connected in
Between clamper module 100 and control module 200.Current-limiting resistance R1 will flow through clamper module 100 and control in active clamp circuit
Current limit in molding block 200 is in current threshold, to avoid each device in active clamp circuit excessive because flowing through electric current
And it burns.
As shown in figure 3, in one embodiment, active clamp circuit further includes third diode D1.Third diode D1 mono-
End is connect with control module 200, and the other end with the gate pole of first switch tube 10 for connecting.
In a specific embodiment, the circuit structure diagram of active clamp circuit is as shown in Figure 3.First switch tube 10 is
IGBT1 pipe.Active clamp circuit is used to carry out clamper control to the current potential of the collector of IGBT1 pipe.Wherein, active clamp circuit
The value of each device is determined according to following manner：
The target of active clamp is to ensure that operating point (Vce, the I of IGBT1 pipe in turn off processC) in the reversed of IGB1T pipe
In bias operation area (RBSOA), two clamp voltage values (static and dynamic) by due to voltage spikes in IGBT1 pipe turn off process Lai
It determines.
When designing current potential, it should reasonably select clamp circuit working range, the setting of clamper point voltage is excessively high, will not have
Dynamic active clamping action.The loss of clamper point brownout, clamp circuit will increase.In this implementation, according to 3.0MW power packages
Part IGBT characteristic, two clamper point (dynamic and static state) recommendations calculate as follows：
1.15Uin(max)≤VDZ1+VDZ2+VDZ3≤1.25Uin(max)
1.25Uin(max)≤VDZ1+VDZ2+VDZ3+VDZ4≤1.45Uin(max)
1312.5≤VDZ1+VDZ2+VDZ3+VDZ4≤1522
1207≤VDZ1+VDZ2+VDZ3≤1312
Since the specified bus operating voltage of 3MW (PCC) power is 1050V, learnt by calculating：
The threshold value for needing to choose DZ1 pipe (DZ2 pipe, DZ3 pipe) is 420V, and DZ4 pipe threshold is 200V.
Third diode is Zener diode D1, model IN5379B, and the maximum instantaneous electric current that can be flowed through is
1.4A。
Selection resistance R1 is 150 Ω.
IGBT pipe maximum leakage current is 5mA,
Selection resistance R2 is 45k Ω.
In the present embodiment, when generating surge voltage when IGBT1 pipe turns off, due to voltage spikes judges the time for less than 300nS.
3C1R2≤300ns
Selection C2 is 2.3nF.
In the present embodiment, the reverse breakdown total voltage of first three TVS pipe is that (breakdown voltage of every TVS pipe is 1260V
420V), the breakdown reverse voltage of the last one TVS pipe is 200V.150 ohm of current-limiting resistance R1 resistance value, can be effectively protected
Each TVS pipe and D1 pipe.Capacitor C1 and resistance R2 form discharge loop, can be managed with accurate judgement afterbody TVS pipe DZ4 whether
It is bypassed (the due to voltage spikes duration is less than 300nS), while effective protection IGBT1 tube body.
Its working principle is that：When Vce voltage is more than or equal to 1260V, and the duration is less than 300ns (by parallel connection
Capacitor C1 capacitance size determines), active clamp circuit work, capacitor C1 bypasses afterbody TVS pipe, while by Vce voltage
Spike is clamped to lower voltage grade.It is greater than 300ns when Vce voltage is less than 1260V or is greater than 1260V but duration, it is active
Clamp circuit does not work.Reverse BV is 1460V in active clamp circuit.
By using the active clamp circuit of the utility model, can under various operating conditions (overload, overcurrent, short circuit) it is right
IGBT1 pipe is effectively protected in the good dynamic electric voltage clamper of the carry out such as IGBT1 pipe.Using the active clamp electricity of the utility model
Road carries out clamper control to IGBT1 pipe, the shutdown IGBT1 pipe when the Vdc of IGBT1 pipe is 1050V, and Ic is 2400A, finally
The due to voltage spikes of IGBT1 pipe becomes 1060V or so after continuing 30ns in 1512V or so.Using the active clamp of the utility model
Circuit carries out clamper control to IGBT1 pipe, when Vdc voltage is 1250V, and Ic is 2400A when shutdown IGBT1 pipe, finally
The due to voltage spikes of IGBT1 pipe is stablized after continuing 20ns in 1260V or so in 1640V or so.By the way that test is found twice above,
This kind of circuit has preferable clamping action in high current.
In one embodiment, as shown in figure 4, control module 200 includes the first clamp diode DZ4, second switch
IGBT2 and controller.First clamp diode DZ4 Opposite direction connection is and in parallel with second switch IGBT2 into circuit.Second opens
The control terminal for closing pipe IGBT2 is connect with controller.Controller is used to detect the emitter and inter-collector of first switch tube IGBT1
Voltage value, the voltage value be greater than or equal to voltage threshold when and the duration be less than time threshold when, control second switch
Pipe IGBT2 conducting, so that the first clamp diode DZ4 is bypassed.
As shown in figure 4, in a specific embodiment, first three TVS pipe (DZ1 pipe, DZ2 pipe and DZ3 of differential concatenation
Pipe) reverse breakdown total voltage be 1260V, the breakdown reverse voltage of the last one TVS pipe (DZ4 pipe) is 200V, with last
A TVS pipe parallel connection is the IGBT1 of low current grade, and the control of IGBT1 terminates controller.When controller detects first switch
When the Vce voltage of pipe IGBT1 is more than or equal to 1260V, and the duration is less than 300ns and (generates surge voltage when the shutdown of IGBT1 pipe
The due to voltage spikes time) when, issue pulse rapidly and open IGBT2 pipe, DZ4 pipe in parallel is bypassed, so that first opens
The Vce voltage clamping of pipe IGBT1 pipe is closed to lower voltage grade.When Vce voltage is less than 1260V or the duration is greater than
When 300ns, active clamp circuit does not work.
Compared with conventional active clamp circuit, initiation culture reduces active clamp circuit in above-described embodiment.Traditional
Active clamp circuit starts as long as the Vce voltage for meeting IGBT1 pipe is more than 1280V, is easy accidentally to open when busbar voltage is excessively high
It is dynamic.And the Vce voltage of active clamp circuit detection IGBT1 pipe provided by the embodiment of the utility model is more than that 1260V continues simultaneously
Time just starts when being less than 300ns (generating the due to voltage spikes time of surge voltage when IGBT1 pipe turns off), reduces starting time
Number.Current-limiting resistance R1 is by the current limit for flowing through TVS pipe and third diode D1 to 1.4A hereinafter, effective protection has simultaneously
Each device in the clamp circuit of source, so that TVS pipe and the service life of third diode D1 increase substantially, simultaneously
The leakage current of IGBT1 pipe is also constrained to standard value.
What above-described embodiment provided is based on 3.0MW Infineon (PCC) power (IGBT model FF1000R17IE4) institute
Surely the active clamp circuit designed, and the type selection calculation formula of each device provided based on the (PCC) power.The embodiment is only
Merely to the essence of the utility model can be more convenient to describe and explain, limited not as implementation.
In one embodiment, the utility model also provides a kind of switching circuit.The switching circuit include first switch tube with
And active clamp circuit described in any of the above-described embodiment.Active clamp circuit is used for the current potential to the collector of first switch tube
Carry out clamper control, wherein the input terminal of clamper module is connect with the collector of the first switch tube, the output of control module
End is connect with the gate pole of the first switch tube.In this embodiment, first switch tube is IGBT pipe.In other embodiments,
One switching tube can also be other kinds of switching tube, such as metal-oxide-semiconductor.
The terms such as similar IGBT pipe, TVS pipe, third diode, switching tube have more been used herein, but have been not precluded
A possibility that using other terms.It is used for the purpose of that the utility model can be more convenient to describe and explain using terms above
Essence, being construed as any additional limitation all is disagreed with the utility model purport.
The above content is only the preferred embodiment of the utility model, for those of ordinary skill in the art, according to this reality
With novel thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as
Limitations of the present invention.
Claims (10)
1. a kind of active clamp circuit, the current potential of the collector for controlling first switch tube, which is characterized in that including clamper mould
Block and control module；For connecting with the collector, the other end is connect with the control module for one end of the clamper module；
The control module is also used to connect with the gate pole of the first switch tube, transmitting when for detecting first switch tube shutdown
The voltage of pole and inter-collector, and when the voltage is greater than or equal to voltage threshold and the duration is less than time threshold, control
It makes the clamper module and clamper control is carried out to collector voltage.
2. active clamp circuit according to claim 1, which is characterized in that the control module includes two pole of the first clamper
Pipe and discharge loop；The cathode of first clamp diode is connect with the output end of the clamper module；The discharge loop
It is in parallel with first clamp diode, for when the voltage is greater than or equal to voltage threshold and the duration is less than described
Between threshold value when by first clamp diode bypass.
3. active clamp circuit according to claim 2, which is characterized in that the discharge loop include in parallel capacitor and
Resistance.
4. active clamp circuit according to claim 1, which is characterized in that the control module includes two pole of the first clamper
Pipe, second switch and controller；The cathode of first clamp diode is connect with the output end of the clamper module, and with
The second switch is in parallel；The control terminal of the second switch is connect with the controller；The controller is for detecting
The emitter of the first switch tube and the voltage value of inter-collector, the voltage value be greater than or equal to the voltage threshold when and
When duration is less than the time threshold, the second switch conducting is controlled.
5. active clamp circuit according to claim 4, which is characterized in that further include current-limiting resistance；The current-limiting resistance
It is serially connected between the clamper module and the control module.
6. active clamp circuit according to claim 5, which is characterized in that the clamper module includes multiple differential concatenations
The second clamp diode, the breakdown reverse voltage summation of second clamp diode is the voltage threshold.
7. active clamp circuit according to claim 6, which is characterized in that first clamp diode and the second pincers
Position diode is TVS pipe.
8. active clamp circuit according to claim 1, which is characterized in that further include third diode；Described 3rd 2
Pole pipe one end is connect with the control module, and the other end with the gate pole for connecting.
9. active clamp circuit according to claim 8, which is characterized in that the third diode is Zener diode.
10. a kind of switching circuit, which is characterized in that including any one of first switch tube and the claims 1-9 institute
The active clamp circuit stated；Wherein, the control module is connect with the gate pole of the first switch tube, the clamper module and institute
State the collector connection of first switch tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820144216.9U CN208143086U (en) | 2018-01-26 | 2018-01-26 | Active clamp circuit and switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820144216.9U CN208143086U (en) | 2018-01-26 | 2018-01-26 | Active clamp circuit and switching circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208143086U true CN208143086U (en) | 2018-11-23 |
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ID=64285226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820144216.9U Active CN208143086U (en) | 2018-01-26 | 2018-01-26 | Active clamp circuit and switching circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176855A (en) * | 2019-05-31 | 2019-08-27 | 芜湖康爱而电气有限公司 | A kind of active clamp protection circuit of the IGBT driving based on HCPL-316J |
| CN110572011A (en) * | 2019-08-20 | 2019-12-13 | 合肥工业大学 | IGBT drive circuit soft switching device with short-circuit protection |
-
2018
- 2018-01-26 CN CN201820144216.9U patent/CN208143086U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176855A (en) * | 2019-05-31 | 2019-08-27 | 芜湖康爱而电气有限公司 | A kind of active clamp protection circuit of the IGBT driving based on HCPL-316J |
| CN110572011A (en) * | 2019-08-20 | 2019-12-13 | 合肥工业大学 | IGBT drive circuit soft switching device with short-circuit protection |
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