CN207782381U - A kind of power source reverse connection protection circuit of high power load driving circuit - Google Patents
A kind of power source reverse connection protection circuit of high power load driving circuit Download PDFInfo
- Publication number
- CN207782381U CN207782381U CN201720773944.1U CN201720773944U CN207782381U CN 207782381 U CN207782381 U CN 207782381U CN 201720773944 U CN201720773944 U CN 201720773944U CN 207782381 U CN207782381 U CN 207782381U
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- China
- Prior art keywords
- oxide
- semiconductor
- metal
- circuit
- motor
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Abstract
The utility model provides a kind of power source reverse connection protection circuit of high power load driving circuit；Including metal-oxide-semiconductor U1, motor M, metal-oxide-semiconductor driving circuit, motor freewheeling circuit, the metal-oxide-semiconductor is connected with motor M, the other end of motor is connect with the anode of power supply POWER, the both ends of the metal-oxide-semiconductor driving circuit are connect with the base stage of metal-oxide-semiconductor U1 and collector respectively, the emitter of metal-oxide-semiconductor is connect with ground terminal GND, and the motor freewheeling circuit is in parallel with motor M.Device is protected by using self- recoverage, is protected rapidly when reverse power connection, it is safe and efficient, any circuit will not be caused to damage and cause danger, circuit restores normal automatically after reversal connection revocation, safe and simple, reliable.
Description
Technical field
The utility model is related to a kind of power source reverse connection protection circuits of high power load driving circuit.
Background technology
In high-power drive circuit, due to having protection diode, driving electricity in power MOS pipe or power drive device
When machine or other inductive loads, a fly-wheel diode can be all connect in output end, big reversed electricity is generated when inhibiting to disconnect driving
Crushing bad device and interference is generated, but such circuit is there are one fatal defect, when accidentally reverse power connection, electricity will be burnt
Circuit component or lines, gently then controller damages, heavy then fire occurs, and causes security risk and property loss.It is domestic and international now
Controller in, this problem does not have solution, this hidden danger to always exist.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of reverse power connection guarantor of high power load driving circuit
Protection circuit, the utility model are achieved by the following technical programs.
A kind of power source reverse connection protection circuit of high power load driving circuit provided by the utility model；Including metal-oxide-semiconductor U1,
Motor M, metal-oxide-semiconductor driving circuit, motor freewheeling circuit, the metal-oxide-semiconductor are connected with motor M, the other end and power supply of motor
The anode connection of POWER, the both ends of the metal-oxide-semiconductor driving circuit are connect with the base stage of metal-oxide-semiconductor U1 and collector respectively, MOS
The emitter of pipe is connect with ground terminal GND, and the motor freewheeling circuit is in parallel with motor M.
The metal-oxide-semiconductor U1 driving circuits include diode D1, zener diode Z1, current-limiting resistance R1, the diode D1
Anode and zener diode anode connection, the cathode of diode D1 connect with the base stage of metal-oxide-semiconductor U1, and zener diode Z1 is born
Pole is connected with the collector of metal-oxide-semiconductor U1, the base stage of the current-limiting resistance R1 access metal-oxide-semiconductor U1s in parallel with diode D1, resistance R1
Front end and MUC output end P1 connections.
The motor freewheeling circuit includes diode D2 and self- recoverage protection device F1, the cathode of diode D2 with from extensive
Device F1 connections, the other end of anode and self- recoverage protection the device F1 of diode D2 is protected to be connected to the two of motor again
End.
The self- recoverage protection device F1 is self-recovery fuse.
The beneficial effects of the utility model are：Device is protected by using self- recoverage, is protected rapidly when reverse power connection,
It is safe and efficient, any circuit will not be caused to damage and cause danger, circuit restores normal automatically after reversal connection revocation, safe and simple,
Reliably.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Specific implementation mode
Be described further below the technical solution of the utility model, but claimed range be not limited to it is described.
A kind of power source reverse connection protection circuit of high power load driving circuit；Including metal-oxide-semiconductor U1, motor M, metal-oxide-semiconductor driving
Circuit, motor freewheeling circuit, the metal-oxide-semiconductor are connected with motor M, and the other end of motor is connect with the anode of power supply POWER, described
The both ends of metal-oxide-semiconductor driving circuit are connect with the base stage of metal-oxide-semiconductor U1 and collector respectively, emitter and the ground terminal GND of metal-oxide-semiconductor
Connection, the motor freewheeling circuit are in parallel with motor M.
The metal-oxide-semiconductor U1 driving circuits include diode D1, zener diode Z1, current-limiting resistance R1, the diode D1
Anode and zener diode anode connection, the cathode of diode D1 connect with the base stage of metal-oxide-semiconductor U1, and zener diode Z1 is born
Pole is connected with the collector of metal-oxide-semiconductor U1, the base stage of the current-limiting resistance R1 access metal-oxide-semiconductor U1s in parallel with diode D1, resistance R1
Front end and MUC output end P1 connections.
The motor freewheeling circuit includes diode D2 and self- recoverage protection device F1, the cathode of diode D2 with from extensive
Device F1 connections, the other end of anode and self- recoverage protection the device F1 of diode D2 is protected to be connected to the two of motor again
End.
The self- recoverage protection device F1 is self-recovery fuse.
Circuit composition and working principle：R1, Z1 and D1 form driving and the protection circuit of power MOS pipe, D2 and F1 compositions
Motor freewheeling circuit, while when reverse power connection, i.e., in figure GND termination powers just, POWER+ connect power supply it is negative when, moment will have
Very big electric current does not have self- recoverage protector by headphone tube inside MOS pipes and afterflow diode D2, existing other circuits
As a result part F1 will be that diode is burnt in metal-oxide-semiconductor or D2 is burnt or printed board inside lines, and cause controller damage even
Cause safety accident.The ingenious application self- recoverage of the utility model protects device F1, instantaneous large-current to trigger it and generate protection, cut-out
High current so that each device is safe, once power supply connects correctly again, circuit restores normal immediately.
Claims (4)
1. a kind of power source reverse connection protection circuit of high power load driving circuit, it is characterised in that：Including metal-oxide-semiconductor U1, motor M,
Metal-oxide-semiconductor driving circuit, motor freewheeling circuit, the metal-oxide-semiconductor are connected with motor M, the anode of the other end and power supply POWER of motor
Connection, the both ends of the metal-oxide-semiconductor driving circuit connect with the base stage of metal-oxide-semiconductor U1 and collector respectively, the emitter of metal-oxide-semiconductor with connect
Ground terminal GND connections, the motor freewheeling circuit are in parallel with motor M.
2. the power source reverse connection protection circuit of high power load driving circuit as described in claim 1, it is characterised in that：It is described
Metal-oxide-semiconductor U1 driving circuits include diode D1, zener diode Z1, current-limiting resistance R1, the anode of the diode D1 and voltage stabilizing
The anode connection of diode, the cathode of diode D1 are connect with the base stage of metal-oxide-semiconductor U1, zener diode Z1 cathode and metal-oxide-semiconductor U1
Collector connection, the current-limiting resistance R1 base stage that accesses metal-oxide-semiconductor U1 in parallel with diode D1, the front end of resistance R1 and MUC
Output end P1 connections.
3. the power source reverse connection protection circuit of high power load driving circuit as described in claim 1, it is characterised in that：The electricity
Machine freewheeling circuit includes cathode and the self- recoverage protection device F1 companies of diode D2 and self- recoverage protection device F1, diode D2
It connects, the other end of anode and self- recoverage protection the device F1 of diode D2 is connected to the both ends of motor.
4. the power source reverse connection protection circuit of high power load driving circuit as claimed in claim 3, it is characterised in that：It is described from
It is self-recovery fuse to restore protection device F1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720773944.1U CN207782381U (en) | 2017-06-29 | 2017-06-29 | A kind of power source reverse connection protection circuit of high power load driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720773944.1U CN207782381U (en) | 2017-06-29 | 2017-06-29 | A kind of power source reverse connection protection circuit of high power load driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207782381U true CN207782381U (en) | 2018-08-28 |
Family
ID=63219020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720773944.1U Expired - Fee Related CN207782381U (en) | 2017-06-29 | 2017-06-29 | A kind of power source reverse connection protection circuit of high power load driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207782381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134751A (en) * | 2017-06-29 | 2017-09-05 | 贵阳永青仪电科技有限公司 | A kind of power source reverse connection protection circuit of high power load drive circuit |
-
2017
- 2017-06-29 CN CN201720773944.1U patent/CN207782381U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134751A (en) * | 2017-06-29 | 2017-09-05 | 贵阳永青仪电科技有限公司 | A kind of power source reverse connection protection circuit of high power load drive circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180828 Termination date: 20200629 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |