CN105207653B - A kind of Over Current Protection System and air conditioner - Google Patents
A kind of Over Current Protection System and air conditioner Download PDFInfo
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- CN105207653B CN105207653B CN201510575318.7A CN201510575318A CN105207653B CN 105207653 B CN105207653 B CN 105207653B CN 201510575318 A CN201510575318 A CN 201510575318A CN 105207653 B CN105207653 B CN 105207653B
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- power switching
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- foldback circuit
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Abstract
The present invention provides the air conditioner of a kind of Over Current Protection System and the application Over Current Protection System, which includes：Micro-processor MCV, current foldback circuit and device for power switching drive module; current foldback circuit includes the first output terminal, the second output terminal, input terminal and reset terminal; reset terminal is connected between the output terminal of Micro-processor MCV and the input terminal of device for power switching drive module; first output terminal is connected with the input terminal of Micro-processor MCV, and the second output terminal is connected between reset terminal and the input terminal of device for power switching drive module；Current foldback circuit is used for when input terminal detects over-current signal, the first output terminal and the second output terminal output shutdown signal；When reset terminal detects open signal, stop the first output terminal and second output terminal output shutdown signal.The system avoids device for power switching device for power switching caused by multiple continuous overcurrent is impacted by latch up protection state and the problem of latch-up occurs.
Description
Technical field
The present invention relates to home appliance technical field, more particularly to a kind of Over Current Protection System and the application overcurrent protection system
The air conditioner of system.
Background technology
In the Over Current Protection System application of current power device, usually connected with mode as shown in Figure 1, such as Fig. 1 institutes
Show：First resistor R1 one end is connected with the output terminal Out of Micro-processor MCV 11, the other end and device for power switching drive module
12 input terminal In and the second output terminal Out2 of current foldback circuit 15 are connected, the output of device for power switching drive module 12
End Out is connected with the first end 1 of device for power switching 13, and the 3rd end 3 of device for power switching is connected with load 14, second resistance
R2 one end is connected with the second end 2 of device for power switching 13, and is grounded, the input terminal In phases of the other end and current foldback circuit 15
Even, the first output terminal Out1 of current foldback circuit 15 is connected with the input terminal In of Micro-processor MCV 11.
As shown in Figure 2：When device for power switching overcurrent, current foldback circuit 15 can export signal by power switch
Device 13 is closed, and protects circuit to stop output protection signal, power when the electric current of device for power switching 13 is less than protection value
Switching device 13 may proceed to conducting or even occur overcurrent again, and continuous overcurrent punching occurs repeatedly in such device for power switching 13
Hit and cause device for power switching latch-up occur, cause the lost of life.
The content of the invention
For above-mentioned technical problem, the present invention provides a kind of Over Current Protection System for solving above-mentioned technical problem and application
The air conditioner of the Over Current Protection System.
In a first aspect, the present invention provides a kind of Over Current Protection System, including：Micro-processor MCV, current foldback circuit and
Device for power switching drive module, the current foldback circuit include the first output terminal, the second output terminal, input terminal and reset
End, the reset terminal are connected to the output terminal of the Micro-processor MCV and the input terminal of the device for power switching drive module
Between, first output terminal is connected with the input terminal of the Micro-processor MCV, and second output terminal is connected to the reset
Between end and the input terminal of the device for power switching drive module；
The current foldback circuit is used for when the input terminal detects over-current signal, first output terminal and described
Second output terminal exports shutdown signal, the device for power switching for making the output terminal with the device for power switching drive module be connected
Close；
And for when the reset terminal detects the open signal inputted by the Micro-processor MCV, stop described the
One output terminal and second output terminal output shutdown signal, make the output terminal with the device for power switching drive module be connected
Device for power switching open.
Optionally, the system also includes first resistor and second resistance, the first resistor to be connected to the microprocessor
Between the output terminal of device MCU and the input terminal of device for power switching drive module, the device for power switching drive module it is defeated
Outlet is connected with the first end of the device for power switching, the second end of the device for power switching and the one of the second resistance
End is connected, and is grounded, and the other end of the second resistance is connected with the input terminal of the current foldback circuit, the power switch
3rd end of device is connected with load, and the second output terminal of the current foldback circuit is connected to the first resistor and the work(
Between the input terminal of rate switching device drive module, the reset terminal of the current foldback circuit is connected to the Micro-processor MCV
Output terminal and the first resistor between.
Optionally, the current foldback circuit includes：Overcurrent protection chip, triode, 3rd resistor, the 4th resistance and
Five resistance, the 4th resistance are connected between second pin and the 8th pin of the overcurrent protection chip, the 5th electricity
One end of resistance is connected with the second pin of the overcurrent protection chip and the 4th resistance, and the other end is as overcurrent protection electricity
The input terminal on road is connected with the second resistance, and the 3rd resistor is connected to the 3rd pin and the institute of the overcurrent protection chip
Between the first end for stating triode, the second end ground connection of the triode, the 3rd end of the triode is as the overcurrent protection
Second output terminal of circuit is connected between the input terminal of the first resistor and the device for power switching drive module, described
7th pin of overcurrent protection chip is as the first output terminal of the current foldback circuit and the input terminal of the Micro-processor MCV
It is connected, the 4th pin of the overcurrent protection chip is connected to the microprocessor as the reset terminal of the current foldback circuit
Between the output terminal of MCU and the first resistor.
Optionally, the current foldback circuit includes：Overcurrent protection chip, triode, 3rd resistor, the 4th resistance and
Five resistance, the 4th resistance are connected between second pin and the 8th pin of the overcurrent protection chip, the 5th electricity
One end of resistance is connected with the second pin of the overcurrent protection chip and the 4th resistance, and the other end is as overcurrent protection electricity
The input terminal on road is connected with the second resistance, and the 3rd resistor is connected to the 3rd pin and the institute of the overcurrent protection chip
Between the first end for stating triode, the second end ground connection of the triode, the 3rd end of the triode is as the overcurrent protection
First output terminal of circuit is connected with the input terminal of the Micro-processor MCV, the 7th pin conduct of the overcurrent protection chip
Second output terminal of the current foldback circuit is connected to the input of the first resistor and the device for power switching drive module
Between end, the 4th pin of the overcurrent protection chip is connected to the microprocessor as the reset terminal of the current foldback circuit
Between the output terminal of MCU and the first resistor.
Optionally, the overcurrent protection chip is NE555.
Optionally, the first pin of the overcurrent protection chip is connected with the 6th pin, and is grounded.
Optionally, diode, the sun of the diode are connected between the 3rd end of the device for power switching and load
Pole is connected with the 3rd end of the device for power switching, and the cathode of the diode is connected with the load.
Optionally, the system also includes inductance and rectifier bridge, anode and institute of the inductance connection in the diode
Between the first output terminal for stating rectifier bridge, the second output terminal phase of the input terminal of the current foldback circuit and the rectifier bridge
Even, the first input end of the rectifier bridge and the second input terminal connection AC power.
Optionally, the device for power switching is insulated gate bipolar transistor.
Second aspect, present invention also offers a kind of air conditioner, including above-mentioned Over Current Protection System.
As shown from the above technical solution, a kind of Over Current Protection System provided by the invention and the application Over Current Protection System
Air conditioner, the current foldback circuit in the Over Current Protection System make device for power switching be protected when there is overcurrent by reset terminal
Shield closes the device for power switching and latches the guard mode, and when reset terminal detects open signal, it is defeated to stop described first
Outlet and second output terminal output shutdown signal, the work(for making the output terminal with the device for power switching drive module be connected
Rate switching device is opened, and avoiding device for power switching appearance by latch up protection state, repeatedly continuous overcurrent impact causes power
There is latch-up in switching device, the problem of causing the lost of life.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these figures.
Fig. 1 is the circuit diagram of Over Current Protection System of the prior art；
Fig. 2 is the control waveform of prior art current foldback circuit；
Fig. 3 is the circuit diagram for the Over Current Protection System that one embodiment of the invention provides；
Fig. 4 is the circuit diagram for the Over Current Protection System that another embodiment of the present invention provides；
Fig. 5 is the circuit diagram for the Over Current Protection System that another embodiment of the present invention provides；
Fig. 6 is the control waveform for the current foldback circuit that one embodiment of the invention provides.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Fig. 3 shows a kind of circuit diagram of Over Current Protection System provided in an embodiment of the present invention, as shown in figure 3, should
Over Current Protection System includes：Micro-processor MCV 31, current foldback circuit 34 and device for power switching drive module 32, the mistake
Stream protection circuit 34 includes the first output terminal Out1, the second output terminal Out2, input terminal In and reset terminal R, the reset terminal R companies
It is connected between the output terminal Out of the Micro-processor MCV 31 and the input terminal In of the device for power switching drive module 32, institute
The input terminal In that the first output terminal Out1 is stated with the Micro-processor MCV 31 is connected, and the second output terminal Out2 is connected to institute
State between reset terminal R and the input terminal In of the device for power switching drive module 32；
The current foldback circuit 34 be used for when input terminal In detects over-current signal, the first output terminal Out1 and
The second output terminal Out2 exports shutdown signal, the output terminal Out with the device for power switching drive module 32 is connected
Device for power switching 33 close；
And for when reset terminal R detects the open signal inputted by the Micro-processor MCV 31, stopping described first
Output terminal Out1 and the second output terminal Out2 output shutdown signals, make defeated with the device for power switching drive module 32
The device for power switching 33 that outlet Out is connected is opened.
It will be appreciated that above-mentioned current foldback circuit 34 is used for when input terminal In detects over-current signal, described first
Output terminal Out1 and the second output terminal Out2 output shutdown signals, wherein shutdown signal can be understood as making and power switch
The shutdown signal that the device for power switching that the output terminal of device drive module is connected is closed, certainly, which can also manage
Solve as low level signal or high level signal, be that useful signal is carried out by low level signal of the shutdown signal in the present embodiment
Illustrate, but the present embodiment and be not limited thereof.
Similar, current foldback circuit 34 detects the open signal inputted by Micro-processor MCV in reset terminal, can also
Low level signal or high level signal are interpreted as, the present embodiment is said using the low level signal of reset terminal as useful signal
It is bright.
Said system further includes first resistor R1, second resistance R2 and current foldback circuit 34, and the first resistor R1 connects
It is connected between the output terminal Out of the Micro-processor MCV 31 and the input terminal In of device for power switching drive module 32, the work(
The output terminal Out of rate switching device drive module 32 is connected with the first end 1 of the device for power switching 33, the power switch
The second end 2 of device 33 is connected with one end of the second resistance R2, and is grounded, the other end of the second resistance R2 with it is described
The input terminal In of current foldback circuit 34 is connected, and the 3rd end 3 of the device for power switching 33 is connected with load 35, the overcurrent
Second output terminal Out2 of protection circuit 34 is connected to the first resistor R1 and the device for power switching drive module 32
Between input terminal In, the reset terminal R of the current foldback circuit is connected to the output terminal Out of the Micro-processor MCV 1 and described
Between first resistor R1.
Current foldback circuit in above-mentioned Over Current Protection System makes device for power switching when there is overcurrent by reset terminal
Protection closes the device for power switching and simultaneously latches the guard mode, when reset terminal detects low level signal, stops described the
One output terminal and second output terminal output low level, make what the output terminal with the device for power switching drive module was connected
Device for power switching is opened, and avoiding device for power switching appearance by latch up protection state, repeatedly continuous overcurrent impact causes work(
The problem of rate switching device latch-up occurs, causes the lost of life, the Over Current Protection System circuit is simple and reliable, cost compared with
It is low.
The circuit structure of above-mentioned current foldback circuit is described in detail below by specific embodiment, the present embodiment
In current foldback circuit in overcurrent protection chip select NE555 to be illustrated, but the present embodiment is not right
The concrete model of the overcurrent protection chip is defined.
As shown in figure 4, the current foldback circuit 34 includes：Overcurrent protection chip IC, triode Q1,3rd resistor R3,
4th resistance R4 and the 5th resistance R5, the 4th resistance R4 are connected to the second pin 2 and of the overcurrent protection chip IC
Between eight pins 8, one end of the 5th resistance R5 and the second pin 2 of the overcurrent protection chip IC and the 4th resistance
R4 is connected, and the other end is connected as the input terminal In of the current foldback circuit 34 with the second resistance R2, the 3rd resistor
R3 is connected between the 3rd pin 3 of the overcurrent protection chip IC and the first end 1 of the triode Q1, the triode Q1
Second end 2 be grounded, the 3rd end 3 of the triode Q1 is connected to institute as the second output terminal Out2 of the current foldback circuit
State between first resistor R1 and the input terminal of the device for power switching drive module 32, the 7th of the overcurrent protection chip IC the
Pin 7 is connected as the first output terminal Out1 of the current foldback circuit with the input terminal In of the Micro-processor MCV 31, described
4th pin 4 of overcurrent protection chip IC is connected to the Micro-processor MCV 31 as the reset terminal R of the current foldback circuit
Between output terminal Out and the first resistor R1.
In another achievable mode of the present embodiment, as shown in figure 5, the current foldback circuit 34 includes：Cross
Stream protection chip IC, triode Q1,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5, the 4th resistance R4 are connected to
Between 2 and the 8th pin 8 of second pin of the overcurrent protection chip IC, one end and the overcurrent of the 5th resistance R5 are protected
The second pin 2 of shield chip IC is connected with the 4th resistance R4, input terminal In of the other end as the current foldback circuit 34
It is connected with the second resistance R2, the 3rd resistor R3 is connected to the 3rd pin 3 of the overcurrent protection chip IC and described
Between the first end 1 of triode Q1, the second end 2 of the triode Q1 is grounded, and the 3rd end 3 of the triode Q1 is used as the mistake
First output terminal Out1 of stream protection circuit is connected with the input terminal In of the Micro-processor MCV 31, the overcurrent protection chip
The 7th pin 7 of IC is connected to the first resistor R1 and the power as the second output terminal Out2 of the current foldback circuit
Between the input terminal of switching device drive module 32, the 4th pin 4 of the overcurrent protection chip is used as the current foldback circuit
Reset terminal R be connected between the output terminal Out of the Micro-processor MCV 31 and the first resistor R1.
Specifically, above-mentioned each pin of overcurrent protection chip IC is defined as follows, the first pin is grounded GND for chip power,
Second pin is Trigger Function foot Trigger, and the 3rd pin is output pin Output, and the 4th pin is to reset Reset, the 5th
Voltage Control, the 6th pin are threshold values Threshold to pin in order to control, and the 7th pin is electric discharge Discharge, and the 8th draws
Foot is chip power Vcc.
In the connection relation of above-mentioned overcurrent protection chip, the first pin 1 of the overcurrent protection chip and the 6th pin 6
It is connected, and is grounded.5th pin 5 is hanging, and second pin is connected with one end of the 4th resistance, the other end and the 8th of the 4th resistance
Pin 8 is connected with VCC.
In above-mentioned Over Current Protection System, two are connected between the 3rd end 3 of the device for power switching 33 and load 35
Pole pipe D1, the anode of the diode D1 are connected with the 3rd end 3 of the device for power switching 33, the cathode of the diode with
The load 35 is connected.The system also includes inductance L1 and rectifier bridge BR1, the inductance L1 to be connected to the diode D1's
Between anode and the first output terminal V+ of the rectifier bridge BR1, the input terminal of the current foldback circuit and the rectifier bridge
Second output terminal V- is connected, the first input end AC1 of the rectifier bridge and the second input terminal AC2 connection AC powers.
It will be appreciated that device for power switching described above can be insulated gate bipolar transistor (Insulated
Gate Bipolar Transisto, abbreviation IGBT), correspondingly, above-mentioned device for power switching drive module can be understood as
IGBT drive module, or intelligent power module (Intelligent Power Module, abbreviation IPM), the present embodiment is not
It is defined.
The operation principle of above-mentioned Over Current Protection System is described in detail below, wherein the controls ripple of current foldback circuit
Shape is as shown in Figure 6.
When the Over Current Protection System is not in the state of overcurrent protection, the output terminal Out outputs of Micro-processor MCV 31
IGBT drive signal Vigbt, when controlling IGBT by IGBT drive module, when the electric current I of IGBT does not reach protection value, i.e. overcurrent
Protect the second pin voltage V of chip IC<During Vcc/3 (IC internal references voltage), there is equation below (1).Overcurrent protection chip
The 3rd pin and the first output terminal of seven pins, that is, current foldback circuit of IC and the second output terminal output low level, triode
Q1 ends, and current foldback circuit is operated in normal condition.
V=(Vcc+R2*I) * R4/ (R4+R5) ... ... ... (1)
When the electric current by formula (1) proper IGBT reaches protection value i.e. equation below (2).
I>=Vcc* (R4+R5-3)/3/R4/R2 ... ... ... (2)
When Over Current Protection System is in the state of overcurrent protection, the 3rd pin of overcurrent protection chip IC and the 7th pin
Export high level, triode Q1 conductings, then Vkill export and lock for low level, as long as the output of Micro-processor MCV 31 at this time
Hold Out output IGBT drive signals Vigbt or high level control IGBT the 4th pin 4 of reset terminal, no matter the electricity of IGBT
Whether stream I reaches protection value, and the first output terminal and the second output terminal of current foldback circuit, which can all export low level, closes IGBT
Close.
When current foldback circuit enters overcurrent protection and latches the guard mode, the reset terminal R of current foldback circuit is connecing
When the IGBT drive signals Vigbt for receiving the output terminal Out outputs of Micro-processor MCV 31 is low level signal, overcurrent protection electricity
The overcurrent protection chip IC on road, which just resets, stops output protection signal i.e. the 3rd pin of stopping and the 7th pin output high level.
Above-mentioned Over Current Protection System enables to make protection closing when overcurrent occur in IGBT constant power switching devices
IGBT and the signal for latching the guard mode, prevent IGBT from continuous overcurrent impact occur repeatedly and causing IGBT breech lock effect occur
Should, cause the lost of life, its circuit is simple, and reliably, cost is low.
Present invention also offers a kind of air conditioner, including above-mentioned Over Current Protection System.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those of ordinary skill in the art that；It still can be to foregoing each implementation
Technical solution described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical solution.
Claims (9)
- A kind of 1. Over Current Protection System, it is characterised in that including：Micro-processor MCV, current foldback circuit and device for power switching Drive module, the current foldback circuit include the first output terminal, the second output terminal, input terminal and reset terminal, the reset terminal It is connected between the output terminal of the Micro-processor MCV and the input terminal of the device for power switching drive module, described first Output terminal is connected with the input terminal of the Micro-processor MCV, and second output terminal is connected to the reset terminal and the power Between the input terminal of switching device drive module；The current foldback circuit is used for when the input terminal detects over-current signal, first output terminal and described second Output terminal exports shutdown signal, closes the device for power switching that the output terminal with the device for power switching drive module is connected Close；And for when the reset terminal detects the open signal inputted by the Micro-processor MCV, it is defeated to stop described first Outlet and second output terminal output shutdown signal, the work(for making the output terminal with the device for power switching drive module be connected Rate switching device is opened；Wherein, the system also includes first resistor and second resistance, the first resistor be connected to the Micro-processor MCV with Between device for power switching drive module, the second resistance is connected to output terminal and the overcurrent protection of the device for power switching Between the input terminal of resistance；The current foldback circuit includes：Overcurrent protection chip, triode, 3rd resistor, the 4th resistance and the 5th resistance, it is described 4th resistance is connected between second pin and the 8th pin of the overcurrent protection chip, one end of the 5th resistance and institute The second pin for stating overcurrent protection chip is connected with the 4th resistance, the other end as the current foldback circuit input terminal with The second resistance is connected, the 3rd resistor be connected to the overcurrent protection chip the 3rd pin and the triode Between one end, the second end of triode ground connection, the 3rd end of the triode is second defeated as the current foldback circuit Outlet is connected between the input terminal of the first resistor and the device for power switching drive module, the overcurrent protection chip The 7th pin be connected as the first output terminal of the current foldback circuit with the input terminal of the Micro-processor MCV, the mistake 4th pin of stream protection chip as the reset terminal of the current foldback circuit be connected to the output terminal of the Micro-processor MCV with Between the first resistor.
- 2. system according to claim 1, it is characterised in that the first resistor is connected to the Micro-processor MCV Between output terminal and the input terminal of device for power switching drive module, the output terminal of the device for power switching drive module and institute The first end for stating device for power switching is connected, and the second end of the device for power switching is connected with one end of the second resistance, And be grounded, the other end of the second resistance is connected with the input terminal of the current foldback circuit, the device for power switching 3rd end is connected with load, and the second output terminal of the current foldback circuit is connected to the first resistor and the power switch Between the input terminal of device drive module, the reset terminal of the current foldback circuit is connected to the output of the Micro-processor MCV Between end and the first resistor.
- 3. Over Current Protection System according to claim 1, it is characterised in that the current foldback circuit includes：Overcurrent is protected Shield chip, triode, 3rd resistor, the 4th resistance and the 5th resistance, the 4th resistance are connected to the overcurrent protection chip Second pin and the 8th pin between, one end of the 5th resistance and the second pin of the overcurrent protection chip and described 4th resistance is connected, and the other end is connected as the input terminal of the current foldback circuit with the second resistance, the 3rd resistor It is connected between the 3rd pin of the overcurrent protection chip and the first end of the triode, the second termination of the triode Ground, the 3rd end of the triode is as the first output terminal of the current foldback circuit and the input terminal of the Micro-processor MCV It is connected, the 7th pin of the overcurrent protection chip is connected to first electricity as the second output terminal of the current foldback circuit Between resistance and the input terminal of the device for power switching drive module, the 4th pin of the overcurrent protection chip is as the overcurrent The reset terminal of protection circuit is connected between the output terminal of the Micro-processor MCV and the first resistor.
- 4. the Over Current Protection System according to claim 1 or 3, it is characterised in that the overcurrent protection chip is NE555.
- 5. the Over Current Protection System according to claim 1 or 3, it is characterised in that the first of the overcurrent protection chip is drawn Foot is connected with the 6th pin, and is grounded.
- 6. the Over Current Protection System according to claim 1 or 3, it is characterised in that the 3rd end of the device for power switching Diode is connected between load, the anode of the diode is connected with the 3rd end of the device for power switching, and described two The cathode of pole pipe is connected with the load.
- 7. Over Current Protection System according to claim 6, it is characterised in that the system also includes inductance and rectifier bridge, The inductance connection between the anode of the diode and the first output terminal of the rectifier bridge, the current foldback circuit Input terminal is connected with the second output terminal of the rectifier bridge, the first input end of the rectifier bridge and the connection exchange of the second input terminal Power supply.
- 8. Over Current Protection System according to claim 1, it is characterised in that the device for power switching is insulated gate bipolar Transistor npn npn.
- 9. a kind of air conditioner, it is characterised in that including the Over Current Protection System as any one of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510575318.7A CN105207653B (en) | 2015-09-10 | 2015-09-10 | A kind of Over Current Protection System and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510575318.7A CN105207653B (en) | 2015-09-10 | 2015-09-10 | A kind of Over Current Protection System and air conditioner |
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| Publication Number | Publication Date |
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| CN105207653A CN105207653A (en) | 2015-12-30 |
| CN105207653B true CN105207653B (en) | 2018-05-11 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498637Y (en) * | 2001-07-13 | 2002-07-03 | 福建省轮船总公司通信导航技术服务分公司 | Self set-up voltage stable electric source with overcurrent and overvoltage protector |
| CN104426120A (en) * | 2013-09-09 | 2015-03-18 | 海洋王（东莞）照明科技有限公司 | Overcurrent and overvoltage protection circuit and lamp |
| CN204597916U (en) * | 2015-04-30 | 2015-08-26 | 上海新时达电气股份有限公司 | A kind of IGBT drive circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3966194B2 (en) * | 2003-03-17 | 2007-08-29 | 株式会社デンソー | Motor control device |
-
2015
- 2015-09-10 CN CN201510575318.7A patent/CN105207653B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498637Y (en) * | 2001-07-13 | 2002-07-03 | 福建省轮船总公司通信导航技术服务分公司 | Self set-up voltage stable electric source with overcurrent and overvoltage protector |
| CN104426120A (en) * | 2013-09-09 | 2015-03-18 | 海洋王（东莞）照明科技有限公司 | Overcurrent and overvoltage protection circuit and lamp |
| CN204597916U (en) * | 2015-04-30 | 2015-08-26 | 上海新时达电气股份有限公司 | A kind of IGBT drive circuit |
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| Publication number | Publication date |
|---|---|
| CN105207653A (en) | 2015-12-30 |
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