CN110676815A - Vehicle, motor controller and overcurrent protection circuit - Google Patents
Vehicle, motor controller and overcurrent protection circuit Download PDFInfo
- Publication number
- CN110676815A CN110676815A CN201910900750.7A CN201910900750A CN110676815A CN 110676815 A CN110676815 A CN 110676815A CN 201910900750 A CN201910900750 A CN 201910900750A CN 110676815 A CN110676815 A CN 110676815A
- Authority
- CN
- China
- Prior art keywords
- signal
- overcurrent protection
- protection circuit
- voltage
- trigger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/085—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 dynamo-electric motors against excessive load
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a vehicle, a motor controller and an overcurrent protection circuit, wherein the overcurrent protection circuit comprises: the detection module is used for detecting a current signal of the protection device and converting the current signal into a voltage signal; the amplifier is used for amplifying the voltage signal; and the control module is used for turning off the protection equipment when the voltage value corresponding to the amplified voltage signal is greater than a preset voltage threshold value. According to the overcurrent protection circuit provided by the embodiment of the invention, the protection equipment can be quickly turned off when the overcurrent point of the protection equipment is detected, so that the overcurrent protection problem caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the overcurrent protection circuit is simple and easy to implement.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle, a motor controller and an overcurrent protection circuit.
Background
An Insulated Gate Bipolar Transistor (IGBT) is used as a core device of an inverter circuit of a motor controller, and plays an important role in controlling a motor. Due to the problems of short circuit of bridge arms of an inverter circuit, short circuit of phase lines of a motor and the like caused by software control problems, electromagnetic interference problems or other artificial problems, the current flowing through the IGBT is greatly increased and seriously exceeds the rated working current, and the IGBT is easy to generate heat and burn out.
The IGBT driving chip generally has a short-circuit detection function and can automatically perform short-circuit protection on the IGBT.
However, when the phase line is short-circuited or the motor is locked, the inductance in the loop is large due to the inductance of the three phase lines of the motor, so that the increasing rate of the current is slow, the time required for reaching the same overcurrent protection value is prolonged, the tolerance time of the IGBT is possibly exceeded, and the problem that the IGBT is damaged remains to be solved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide an overcurrent protection circuit, which can quickly turn off a protection device when an overcurrent point of the protection device is detected, so as to effectively solve the overcurrent protection problem caused by a short circuit or a rotation blockage of a phase line of a motor, greatly improve the safety of the circuit, and be simple and easy to implement.
A second object of the present invention is to provide a motor controller.
A third object of the invention is to propose a vehicle.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an overcurrent protection circuit, including: the detection module is used for detecting a current signal of the protection equipment and converting the current signal into a voltage signal; the amplifier is used for amplifying the voltage signal; and the control module is used for turning off the protection equipment when the voltage value corresponding to the amplified voltage signal is greater than a preset voltage threshold value.
In addition, the overcurrent protection circuit according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the control module comprises: the voltage comparator is used for outputting a level jump signal when the voltage value corresponding to the amplified voltage signal is greater than the voltage threshold value; and the triggering submodule is used for switching off the protection equipment under the triggering of the level jump signal.
According to one embodiment of the invention, the trigger submodule includes: the trigger unit is used for outputting a high-level signal under the trigger of the level jump signal; and the latch is used for outputting a high-resistance state under the action of the high-level signal, so that the low-level signal is input to the control end of the protection equipment, and the protection equipment is turned off.
According to one embodiment of the present invention, the trigger unit includes: the trigger subunit is used for outputting a rising edge signal under the trigger of the level jump signal; and the flip-flop is used for outputting the high-level signal under the triggering of the rising edge signal.
According to one embodiment of the invention, the trigger subunit comprises: the photoelectric coupler is used for outputting a falling edge signal under the trigger of the level jump signal; an inverter for converting the falling edge signal into the rising edge signal.
According to one embodiment of the invention, the detection module is a current sensing resistor.
According to one embodiment of the invention, the current sensor is a hall type current sensor.
According to one embodiment of the invention, the protection device is an insulated gate bipolar transistor.
According to the overcurrent protection circuit provided by the embodiment of the invention, the current signal of the protection device can be detected through the detection module, the current signal is converted into the voltage signal, the voltage signal is amplified through the amplifier, and the protection device is turned off through the control module when the voltage value corresponding to the amplified voltage signal is greater than the preset voltage threshold value. Therefore, when the overcurrent point of the protection equipment is detected, the protection equipment can be quickly turned off, so that the problem of overcurrent protection caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the overcurrent protection device is simple and easy to realize.
In order to achieve the above object, a second embodiment of the present invention provides a motor controller, which includes the above over-current protection circuit.
According to the motor controller provided by the embodiment of the invention, through the overcurrent protection circuit, the protection equipment can be quickly turned off when the overcurrent point of the protection equipment is detected, so that the overcurrent protection problem caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the overcurrent protection circuit is simple and easy to implement. In order to achieve the above object, a third embodiment of the invention proposes a vehicle including the above motor controller.
According to the vehicle provided by the embodiment of the invention, the motor controller can quickly turn off the protection equipment when the overcurrent point of the protection equipment is detected, so that the overcurrent protection problem caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the motor controller is simple and easy to implement.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a block schematic diagram of an over-current protection circuit according to an embodiment of the present invention;
FIG. 2 is a circuit schematic of a current sampling circuit according to one embodiment of the present invention;
FIG. 3 is a circuit schematic of an over-current protection circuit according to one embodiment of the present invention;
FIG. 4 is a circuit schematic of an over-current protection circuit according to another embodiment of the present invention;
FIG. 5 is a block schematic diagram of a motor controller according to an embodiment of the invention;
FIG. 6 is a block schematic diagram of a vehicle according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A vehicle, a motor controller, and an overcurrent protection circuit according to embodiments of the invention are described below with reference to the drawings.
Fig. 1 is a block diagram of an overcurrent protection circuit according to an embodiment of the present invention. As shown in fig. 1, the overcurrent protection circuit 10 includes: a detection module 100, an amplifier 200 and a control module 300.
The detection module 100 is configured to detect a current signal of the protection device and convert the current signal into a voltage signal.
Alternatively, according to an embodiment of the present invention, the protection device may be an insulated gate bipolar transistor.
Alternatively, according to an embodiment of the present invention, the detection module 100 may be a current sensing resistor.
Specifically, the detection module 100 may be configured to detect a current signal of the protection device, and for a low-power circuit, the embodiment of the present invention may perform measurement through a current detection resistor, and for a high-power circuit, the embodiment of the present invention may perform measurement through a current sensor, and after acquiring the current signal, convert the voltage signal into a voltage signal through a conversion method in the related art. Alternatively, according to an embodiment of the present invention, the current sensor may be a hall type current sensor.
The amplifier 200 is used to amplify the voltage signal. Specifically, the amplifier 200 may amplify the voltage signal output by the current sensor, and the amplification factor of the amplifier may be set according to practical situations, and is not particularly limited herein.
For example, as shown in fig. 2, the current sampling circuit includes: the amplifier comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2 and an amplifier 200. The first resistor R1 is connected in parallel with the second resistor R2, the first end of the second resistor R2 is connected to the third end of the amplifier 200 through the third resistor R3, and the second end of the second resistor R2 is connected to the fourth end of the amplifier 200 through the fourth resistor R4; the second capacitor C2 is connected in parallel with the fifth resistor R5, a first end of the second capacitor C2 is connected to the first end of the amplifier 200, and a second end of the second capacitor C2 is connected to the fourth end of the amplifier 200; a first terminal of the first capacitor C1 is connected to the fifth terminal of the amplifier 200; the second end of the first capacitor C1 is grounded; the second terminal of the amplifier 200 is connected to ground.
Specifically, assuming that the current detection resistor R1 is 50m Ω, when a current flows through the current detection resistor R1, the current is converted into a corresponding minute voltage and then amplified by the amplifier 200, wherein assuming that the current is 1A, the voltage across the current detection resistor R1 is 50mV, the amplification factor of the amplifier 200 is 10 times, and the amplified output voltage is 0.5V.
The control module 300 is configured to turn off the protection device when a voltage value corresponding to the amplified voltage signal is greater than a preset voltage threshold.
Wherein, according to an embodiment of the present invention, the control module 300 includes: the voltage comparator is used for outputting a level jump signal when a voltage value corresponding to the amplified voltage signal is greater than a voltage threshold value; and the triggering submodule is used for switching off the protection equipment under the triggering of the level jump signal.
It should be understood that the voltage comparator is a circuit for discriminating and comparing input signals, and is a basic unit circuit constituting the non-sine wave generation circuit. Commonly used voltage comparators include single-limit comparators, hysteretic comparators, window comparators, tri-state voltage comparators, etc. The voltage comparator can be used as an interface of an analog circuit and a digital circuit, can also be used as a waveform generating and converting circuit and the like, and can convert a sine wave into a square wave or a rectangular wave with the same frequency by using the simple voltage comparator.
Therefore, the embodiment of the present invention may preset a voltage threshold, after the voltage signal is amplified by the amplifier 200, the voltage comparator compares the amplified voltage signal with the voltage threshold, and if the amplified voltage signal is greater than the voltage threshold, the voltage comparator outputs a level jump signal.
Further, according to an embodiment of the present invention, the trigger submodule includes: the trigger unit is used for outputting a high-level signal under the trigger of the level jump signal; and the latch is used for outputting a high-resistance state under the action of the high-level signal, so that the low-level signal is input to the control end of the protection equipment, and the protection equipment is turned off.
According to one embodiment of the present invention, a trigger unit includes: the trigger subunit is used for outputting a rising edge signal under the trigger of the level jump signal; and the trigger is used for outputting a high-level signal under the trigger of the rising edge signal.
According to one embodiment of the invention, the trigger subunit comprises: the photoelectric coupler is used for outputting a falling edge signal under the trigger of the level jump signal; and the inverter is used for converting the falling edge signal into the rising edge signal.
Specifically, as shown in fig. 3, the overcurrent protection circuit may include: a plurality of resistors, a plurality of capacitors, an amplifier 200, a photocoupler, an inverter, and the like. Specifically, after the current detecting resistor detects the current signal of the protection device, the current signal may be converted into a voltage signal, the voltage signal is amplified by the amplifier 200, the voltage value corresponding to the amplified voltage signal is compared with a preset voltage threshold value by the voltage comparator, if the voltage value corresponding to the amplified voltage signal is greater than the voltage threshold value, a level jump signal is output, a falling edge signal is output by the photocoupler under the trigger of the level jump signal, the falling edge signal is converted into a rising edge signal by the inverter, as shown in fig. 4, the falling edge signal is output by the photocoupler under the trigger of the level jump signal, and the falling edge signal is converted into the rising edge signal by the inverter, the rising edge signal may trigger the flip-flop to output a high level signal, and the latch OE pin inputs the high level signal, the latch outputs a high-resistance state under the action of a high-level signal, the output of the latch generates a low level under the action of the pull-down resistor, and gate poles of all IGBTs are turned off, so that the IGBTs are turned off. According to the method, through actual measurement and calculation, only 100ns is delayed from an overcurrent point to a turn-off protection device when the overcurrent point is detected, the response speed is very high, high voltage and low voltage are separated through optical coupling isolation, and safety is effectively guaranteed.
It should be noted that the method for calculating the current protection threshold of the overcurrent protection circuit 10 according to the embodiment of the present invention may be calculated in the following manner.
Assuming that the voltage threshold is set to V, the amplification factor of the amplifier is G, the current protection threshold is I, and the detection module 100 is a current detection resistor R, the following relationship exists:
R*I*G＝V；
when the voltage threshold is 3.98V, the amplification factor is 10 and the current detection resistance is 2.5mR, the protection threshold of the current is
According to the overcurrent protection circuit provided by the embodiment of the invention, the current signal of the protection device can be detected through the detection module, the current signal is converted into the voltage signal, the voltage signal is amplified through the amplifier, and the protection device is turned off through the control module when the voltage value corresponding to the amplified voltage signal is greater than the preset voltage threshold value. Therefore, when the overcurrent point of the protection equipment is detected, the protection equipment can be quickly turned off, so that the problem of overcurrent protection caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the overcurrent protection device is simple and easy to realize.
As shown in fig. 5, the embodiment of the present invention further provides a motor controller 20, where the motor controller 20 includes the over-current protection circuit 10.
According to the motor controller provided by the embodiment of the invention, through the overcurrent protection circuit, the protection equipment can be quickly turned off when the overcurrent point of the protection equipment is detected, so that the overcurrent protection problem caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the overcurrent protection circuit is simple and easy to implement.
As shown in fig. 6, the embodiment of the present invention proposes a vehicle 30, and the vehicle 30 includes the motor controller 20 described above.
According to the vehicle provided by the embodiment of the invention, the motor controller can quickly turn off the protection equipment when the overcurrent point of the protection equipment is detected, so that the overcurrent protection problem caused by the short circuit or the locked rotor of the phase line of the motor is effectively solved, the safety of the circuit is greatly improved, and the motor controller is simple and easy to implement.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An overcurrent protection circuit, comprising:
the detection module is used for detecting a current signal of the protection equipment and converting the current signal into a voltage signal;
the amplifier is used for amplifying the voltage signal;
and the control module is used for turning off the protection equipment when the voltage value corresponding to the amplified voltage signal is greater than a preset voltage threshold value.
2. The overcurrent protection circuit of claim 1, wherein the control module comprises:
the voltage comparator is used for outputting a level jump signal when the voltage value corresponding to the amplified voltage signal is greater than the voltage threshold value;
and the triggering submodule is used for switching off the protection equipment under the triggering of the level jump signal.
3. The overcurrent protection circuit of claim 2, wherein the trigger submodule comprises:
the trigger unit is used for outputting a high-level signal under the trigger of the level jump signal;
and the latch is used for outputting a high-resistance state under the action of the high-level signal, so that the low-level signal is input to the control end of the protection equipment, and the protection equipment is turned off.
4. The overcurrent protection circuit of claim 3, wherein the trigger unit comprises:
the trigger subunit is used for outputting a rising edge signal under the trigger of the level jump signal;
and the flip-flop is used for outputting the high-level signal under the triggering of the rising edge signal.
5. The overcurrent protection circuit of claim 4, wherein the trigger subunit comprises:
the photoelectric coupler is used for outputting a falling edge signal under the trigger of the level jump signal;
an inverter for converting the falling edge signal into the rising edge signal.
6. The overcurrent protection circuit of claim 1, wherein the detection module is a current sensing resistor.
7. The overcurrent protection circuit of claim 1, wherein the current sensor is a Hall current sensor.
8. The overcurrent protection circuit of claim 1, wherein the protection device is an insulated gate bipolar transistor.
9. A motor controller, comprising: an overcurrent protection circuit as claimed in any one of claims 1 to 8.
10. A vehicle, characterized by comprising: a motor controller according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900750.7A CN110676815A (en) | 2019-09-23 | 2019-09-23 | Vehicle, motor controller and overcurrent protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910900750.7A CN110676815A (en) | 2019-09-23 | 2019-09-23 | Vehicle, motor controller and overcurrent protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110676815A true CN110676815A (en) | 2020-01-10 |
Family
ID=69077574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910900750.7A Pending CN110676815A (en) | 2019-09-23 | 2019-09-23 | Vehicle, motor controller and overcurrent protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110676815A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721991A (en) * | 2020-06-04 | 2020-09-29 | 华帝股份有限公司 | Detection circuit for direct current variable frequency current |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11299218A (en) * | 1998-04-17 | 1999-10-29 | Mitsubishi Electric Corp | Insulated gate type semiconductor device with over current detecting function |
| CN107093889A (en) * | 2017-06-08 | 2017-08-25 | 电子科技大学 | Electric machine controller with overcurrent protection function |
| CN108599111A (en) * | 2018-06-14 | 2018-09-28 | 谢红普 | A kind of electric machine controller and its current foldback circuit |
| CN208782462U (en) * | 2018-09-28 | 2019-04-23 | 张永健 | A kind of IGBT short-circuit protection circuit |
| CN209283196U (en) * | 2018-12-27 | 2019-08-20 | 深圳市英威腾电动汽车驱动技术有限公司 | The current foldback circuit of insulated gate bipolar transistor |
-
2019
- 2019-09-23 CN CN201910900750.7A patent/CN110676815A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11299218A (en) * | 1998-04-17 | 1999-10-29 | Mitsubishi Electric Corp | Insulated gate type semiconductor device with over current detecting function |
| CN107093889A (en) * | 2017-06-08 | 2017-08-25 | 电子科技大学 | Electric machine controller with overcurrent protection function |
| CN108599111A (en) * | 2018-06-14 | 2018-09-28 | 谢红普 | A kind of electric machine controller and its current foldback circuit |
| CN208782462U (en) * | 2018-09-28 | 2019-04-23 | 张永健 | A kind of IGBT short-circuit protection circuit |
| CN209283196U (en) * | 2018-12-27 | 2019-08-20 | 深圳市英威腾电动汽车驱动技术有限公司 | The current foldback circuit of insulated gate bipolar transistor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111721991A (en) * | 2020-06-04 | 2020-09-29 | 华帝股份有限公司 | Detection circuit for direct current variable frequency current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3454186B2 (en) | Power converter | |
| CN107887895A (en) | Detection means, detection method and detecting system | |
| KR20130035886A (en) | Semiconductor device | |
| CN103795033A (en) | Detecting and protecting circuit and method for inter-phase short circuit of switch reluctance motor | |
| JP2011172320A (en) | Switching control circuit | |
| US20180294635A1 (en) | Overcurrent protection device and vehicular electronic control unit | |
| CN103441471B (en) | A kind of three tunnels export the current foldback circuit of DC/DC converter | |
| CN202261136U (en) | Motor and overcurrent detection circuit thereof | |
| CN110676815A (en) | Vehicle, motor controller and overcurrent protection circuit | |
| JP2019216540A (en) | Controller of power inverter circuit | |
| CN103187710B (en) | Current-limit and over-current double current loop protection circuit | |
| CN217240579U (en) | Driving circuit and motor control system of IGBT module | |
| CN107635299B (en) | Electromagnetic heating cooking system and driving chip of power switch tube thereof | |
| CN111614063A (en) | Short-circuit protection circuit and short-circuit protection system | |
| CN211061674U (en) | IPM module short circuit detection circuit | |
| CN214335050U (en) | Current sampling circuit | |
| CN209805667U (en) | drive circuit with power output port state detection function and low-end and/or high-end drive control circuit | |
| JP2011103756A (en) | Semiconductor power conversion device | |
| CN111969561A (en) | SiC MOSFET IPM rapid short-circuit protection circuit | |
| JP2004282959A (en) | Drive device of voltage-control type drive element | |
| CN107565954B (en) | Passive shaping circuit | |
| CN220874215U (en) | Overcurrent protection circuit | |
| CN209897011U (en) | Power amplifier output direct current monitoring circuit when power amplifier carries out short-circuit protection test | |
| CN218350369U (en) | Alternating current side overcurrent detection circuit | |
| CN217063264U (en) | IGBT protection circuit and inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200110 |
|
| RJ01 | Rejection of invention patent application after publication |