CN105552840A - Large current motor driving circuit with power end protected from back connection - Google Patents
Large current motor driving circuit with power end protected from back connection Download PDFInfo
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- CN105552840A CN105552840A CN201610045635.2A CN201610045635A CN105552840A CN 105552840 A CN105552840 A CN 105552840A CN 201610045635 A CN201610045635 A CN 201610045635A CN 105552840 A CN105552840 A CN 105552840A
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- 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
- H02H7/0833—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 for electric motors with control arrangements
- H02H7/0838—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 for electric motors with control arrangements with H-bridge circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
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- 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
- H02H7/09—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 over-voltage; against reduction of voltage; against phase interruption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses a large current motor driving circuit with a power end protected from back connection. A power end back connection protection module comprises a P channel metal oxide semiconductor (MOS) transistor. A power module is connected with the source pole of the P channel MOS transistor. The grid pole of the P channel MOS transistor is grounded. The leakage pole of the P channel MOS transistor is connected with power supply ends of a first half bridge drive module and a second half bridge drive module. The first half bridge drive module and the second half bridge drive module form an H bridge drive module to be used for driving a motor. An MOS transistor is added at the power supply end. While the power supply driving large current motor is protected from back connection by use of the P channel MOS transistor, two half bridge integrated chips form full bridge drive so as to realize control of large current of the motor, so that output overcurrent, output short circuit, output open circuit and ESD in output load are prevented.
Description
Technical field
The present invention relates to electric motor of automobile large driven current density reverse connecting protection and drive application, the large-current electric drive circuit of the particularly anti-reverse protection of a kind of power end.
Background technology
Along with the develop rapidly of economy, automobile industry rises to China's pillar of the economy industry gradually, and along with the fast development of Electronic Control Technology in Modern Automobiles, the starting of increasing automatic transmission emerges in large numbers, and the occupation rate of market of automatic transmission also progressively improves; The sensor signal of vehicle operational mode is passed to electronic control unit (ECU-ElectronicControlUnit) by AMT selector, ECU processes by analysis, send PWM instruction control direct current machine to rotate and reverse, realize the angular turn of step electric machine and the execution of transmission mechanism; Because not only moving the durability of circuit to big current motor drive power supply end reverse connection prevention protection circuit in the industry, reliability, stability, high temperature resistant environmental performance demand are strict; meanwhile, solve load output overcurrent own, problem that output short-circuit, output open circuit, ESD bring.
Summary of the invention
The technical problem to be solved in the present invention is: increase metal-oxide-semiconductor at power end; while utilizing the metal-oxide-semiconductor of P raceway groove to realize the motor-driven reverse power connection protection of big current; use two half-bridge integrated chip composition full-bridges to drive the control realizing motor big current, avoid output loading to occur the problem that output overcurrent, output short-circuit, output open circuit, ESD bring.
To achieve these goals, the technological means that the present invention takes is specially: the large-current electric drive circuit of the anti-reverse protection of a kind of power end, comprises control module, power module, power end reverse connecting protection module, the first half-bridge driven module, the second half-bridge driven module, the first predrive module, the second predrive module, the first load diagnostic module and the second load diagnostic module, described power end reverse connecting protection module comprises P channel MOS tube, described power module is connected with the source electrode of P channel MOS tube, the grounded-grid of described P channel MOS tube, the drain electrode of described P channel MOS tube and the first half-bridge driven module, the power end of the second half-bridge driven module connects, described first half-bridge driven module and the second half-bridge driven module form H bridge driver module and are used for drive motors, described control module and the first predrive module, second predrive model calling, described first predrive module and the first half-bridge driven model calling, described second predrive module and the second half-bridge driven model calling, described first half-bridge driven module is connected with the first load diagnostic module, described first load diagnostic module is connected with control module, described second half-bridge driven module is connected with the second load diagnostic module, described second load diagnostic module is connected with control module, the earth terminal of described first half-bridge driven module and the second half-bridge driven module is used for ground connection.
In the present invention, each functional circuit can adopt existing corresponding function circuit form, drive driving module and can adopt existing half-bridge driven integrated chip, P channel MOS tube and periphery treatment circuit thereof are prior art, the present invention is based on existing half-bridge driven integrated chip application technology, namely by control module through predrive module application in H bridge driver module, and real-time pid algorithm output pwm signal is to pre-driving module, control H bridge driver module is to realize rotating and reverse of motor, control module is connected to predrive module, predrive model calling is to H bridge driver module, control module is connected to again by load diagnostic module, monitored the running status of load in real time by load diagnostic module by control module, once load occurs abnormal, by the strategy of control module, and close load driving in time, feedback diagnostic message.When applying, described power module gives the first half-bridge driven module and the second half-bridge driven module for power supply after power end reverse connecting protection module.
Further, described power end reverse connecting protection module comprises High frequency filter unit, input Overvoltage protecting unit, output over-voltage protection unit, exports voltage regulation unit, resistance unit and absorbing circuit unit; Described High frequency filter unit is connected with input Overvoltage protecting unit; described input Overvoltage protecting unit is connected with the source electrode of P channel MOS tube; described absorbing circuit unit be connected to P channel MOS tube source electrode and drain electrode between; described resistance unit one end is connected with the grid of P channel MOS tube; its other end ground connection; described output over-voltage protection unit is connected between the drain and gate of P channel MOS tube, and described output voltage regulation unit is connected with the drain electrode of P channel MOS tube.
Further, described High frequency filter unit comprises electric capacity C2 and electric capacity C5, described input Overvoltage protecting unit comprises TVS pipe TVS2, described output over-voltage protection unit comprises TVS pipe TVS1 and electric capacity C4, described output voltage regulation unit comprises electrochemical capacitor E1 and electric capacity C3, described resistance unit comprises resistance R2, and described absorbing circuit unit comprises resistance R1 and electric capacity C1; The source electrode of described P channel MOS tube is connected with one end of electric capacity C2, and the other end of described C2 is connected with one end of electric capacity C5, the other end ground connection of described electric capacity C5; One end of described TVS pipe TVS2 is connected with the source electrode of P channel MOS tube, other end ground connection, described resistance R1 connects with electric capacity C1, in parallel and the one common port of described electrochemical capacitor E1 and electric capacity C3 is connected with the drain electrode of P channel MOS tube, its another common end grounding, described resistance R2 is connected with the grid of P channel MOS tube, its other end ground connection, in parallel and the one common port of described TVS pipe TVS1 and electric capacity C4 is connected with the drain electrode of P channel MOS tube, and its another common port is connected with the grid of P channel MOS tube.
Further, the driving chip U1 that described first half-bridge driven module is BTN8962TA by model is formed, 2 pin, 3 pin of described first predrive module and driving chip U1 are connected, 5 pin, 6 pin of described first load diagnostic module and driving chip U1 are connected, and described power end reverse connecting protection module is connected with 7 pin of driving chip U1; The driving chip U2 that described second half-bridge driven module is BTN8962TA by model is formed, 2 pin, 3 pin of described second predrive module and driving chip U2 are connected, 5 pin, 6 pin of described second load diagnostic module and driving chip U2 are connected, and described power end reverse connecting protection module is connected with 7 pin of driving chip U2; 4 pin of described driving chip U1 and 4 pin of driving chip U2 are used for drive motors.
Further, described first half-bridge driven module also comprises resistance R9, electric capacity C12, electric capacity C6, electric capacity C9 and electric capacity C11, one end of described resistance R9 is connected with 4 pin of driving chip U1, its other end is connected with one end of electric capacity C12, the other end of described electric capacity C12 is connected and ground connection with one end of electric capacity C11, the other end of described electric capacity C11 is connected with one end of electric capacity C9, and the other end of described electric capacity C9 is connected with 7 pin of driving chip U1; Described first half-bridge driven module also comprises resistance R10, electric capacity C13, electric capacity C7, electric capacity C10 and electric capacity C8, one end of described resistance R10 is connected with 4 pin of driving chip U2, its other end is connected with one end of electric capacity C13, the other end of described electric capacity C13 is connected and ground connection with one end of electric capacity C10, the other end of described electric capacity C10 is connected with one end of electric capacity C8, and the other end of described electric capacity C8 is connected with 7 pin of driving chip U2.
Further, described first predrive module comprises resistance R3, resistance R5 and resistance R7, described resistance R5 one end connects and is connected with control module, resistance R3 one end, the other end of described resistance R5 is connected with 3 pin of driving chip U1, described resistance R3 other end ground connection, one end of described resistance R7 is connected with control module, and its other end is connected with 2 pin of driving chip U1; Described second predrive module comprises resistance R4, resistance R6 and resistance R8, described resistance R6 one end connects and is connected with control module, resistance R4 one end, the other end of described resistance R6 is connected with 3 pin of driving chip U2, described resistance R4 other end ground connection, one end of described resistance R8 is connected with control module, and its other end is connected with 2 pin of driving chip U2.
Further, described first load diagnostic module comprises resistance R11 and resistance R12; 6 pin of described driving chip U1 are connected with control module, and one end of described resistance R11 is connected with 6 pin of driving chip U1, and its other end is connected and ground connection with one end of resistance R12, and the other end of described resistance R12 is connected with 5 pin of driving chip U1; Described second load diagnostic module comprises resistance R13 and resistance R14; 6 pin of described driving chip U2 are connected with control module, and one end of described resistance R13 is connected with 6 pin of driving chip U2, and its other end is connected and ground connection with one end of resistance R14, and the other end of described resistance R14 is connected with 5 pin of driving chip U2.
Compared with prior art, the invention has the beneficial effects as follows: when reverse power connection appears in large-current electric drive circuit power end and earth terminal, the metal-oxide-semiconductor of P raceway groove is in cut-off state, realizes H bridge driver module motor and drives reverse connecting protection, avoid burning of circuit loop; When the load open circuit of large-current electric drive circuit, control module is by load diagnostic module, and the current status of monitoring load, identifies whether load opens a way, and realizes the open circuit diagnosis of load; When large-current electric drive circuit output overcurrent, control module is by load diagnostic module, and the current status of monitoring load, identifies load whether overcurrent, realize overcurrent protection and the diagnosis of load; When large-current electric drive circuit output short-circuit, control module is by load diagnostic module, and the current status of monitoring load, identifies load whether short circuit, realize short-circuit protection and the diagnosis of load; When the feeder ear overvoltage of large-current electric drive circuit; the impulse train interference that absorption power supply enters by power end reverse connecting protection module; the circuit such as protection H bridge driver module; realize power end overvoltage protection; while realizing H bridge driver module; solve H bridge driver module output overcurrent, problem that output short-circuit, output open circuit, ESD bring, improve the reliability of big current motor drive power supply end reverse connection prevention protection circuit immunity to interference and controller work.
Accompanying drawing explanation
Figure 1 shows that novel plug structural schematic block diagram of the present invention;
Figure 2 shows that the main driving circuit structure schematic diagram in the present invention;
Figure 3 shows that the electrical block diagram of the power end reverse connecting protection module in the present invention.
Embodiment
By reference to the accompanying drawings, the specific embodiment of the present invention is described in detail;
As shown in Figure 1, Figure 2 and Figure 3, a large-current electric drive circuit for the anti-reverse protection of power end, comprises control module, power module, power end reverse connecting protection module, the first half-bridge driven module, the second half-bridge driven module, the first predrive module, the second predrive module, the first load diagnostic module and the second load diagnostic module, described power end reverse connecting protection module comprises P channel MOS tube, described power module is connected with the source electrode of P channel MOS tube, the grounded-grid of described P channel MOS tube, the drain electrode of described P channel MOS tube and the first half-bridge driven module, the power end of the second half-bridge driven module connects, described first half-bridge driven module and the second half-bridge driven module form H bridge driver module and are used for drive motors, described control module and the first predrive module, second predrive model calling, described first predrive module and the first half-bridge driven model calling, described second predrive module and the second half-bridge driven model calling, described first half-bridge driven module is connected with the first load diagnostic module, described first load diagnostic module is connected with control module, described second half-bridge driven module is connected with the second load diagnostic module, described second load diagnostic module is connected with control module, the earth terminal of described first half-bridge driven module and the second half-bridge driven module is used for ground connection.Preferably, described power end reverse connecting protection module comprises High frequency filter unit, input Overvoltage protecting unit, output over-voltage protection unit, exports voltage regulation unit, resistance unit and absorbing circuit unit; Described High frequency filter unit is connected with input Overvoltage protecting unit; described input Overvoltage protecting unit is connected with the source electrode of P channel MOS tube; described absorbing circuit unit be connected to P channel MOS tube source electrode and drain electrode between; described resistance unit one end is connected with the grid of P channel MOS tube; its other end ground connection; described output over-voltage protection unit is connected between the drain and gate of P channel MOS tube; described output voltage regulation unit is connected with the drain electrode of P channel MOS tube; wherein, the model of P channel MOS tube is P6010DDG.
In the present invention, each functional module can adopt existing corresponding function circuit form, drive driving module and can adopt existing half-bridge driven integrated chip, P channel MOS tube and periphery treatment circuit thereof are prior art, the present invention is based on existing half-bridge driven integrated chip application technology, namely by control module through predrive module application in H bridge driver module, and real-time pid algorithm output pwm signal is to pre-driving module, control H bridge driver module is to realize rotating and reverse of motor, control module is connected to predrive module, predrive model calling is to H bridge driver module, control module is connected to again by load diagnostic module, monitored the running status of load in real time by load diagnostic module by control module, once load occurs abnormal, by the strategy of control module, and close load driving in time, feedback diagnostic message.When applying, described power module gives the first half-bridge driven module and the second half-bridge driven module for power supply after power end reverse connecting protection module.
Particularly, described High frequency filter unit comprises electric capacity C2 and electric capacity C5, described input Overvoltage protecting unit comprises TVS pipe TVS2, described output over-voltage protection unit comprises TVS pipe TVS1 and electric capacity C4, described output voltage regulation unit comprises electrochemical capacitor E1 and electric capacity C3, described resistance unit comprises resistance R2, and described absorbing circuit unit comprises resistance R1 and electric capacity C1, the source electrode of described P channel MOS tube is connected with one end of electric capacity C2, and the other end of described C2 is connected with one end of electric capacity C5, the other end ground connection of described electric capacity C5, one end of described TVS pipe TVS2 is connected with the source electrode of P channel MOS tube, other end ground connection, described resistance R1 connects with electric capacity C1, in parallel and the one common port of described electrochemical capacitor E1 and electric capacity C3 is connected with the drain electrode of P channel MOS tube, its another common end grounding, described resistance R2 is connected with the grid of P channel MOS tube, its other end ground connection, in parallel and the one common port of described TVS pipe TVS1 and electric capacity C4 is connected with the drain electrode of P channel MOS tube, its another common port is connected with the grid of P channel MOS tube, BAT and 24V power module, through electric capacity C2, C5 High frequency filter, again through TVS pipe TVS2 power supply overvoltage protection, again through electrochemical capacitor E1, electric capacity C3, the 24V power supply of electric capacity C4 voltage stabilizing stable output, wherein, TVS pipe model is 5KP33CA.
Particularly, the driving chip U1 that described first half-bridge driven module is BTN8962TA by model is formed, 2 pin, 3 pin of described first predrive module and driving chip U1 are connected, 5 pin, 6 pin of described first load diagnostic module and driving chip U1 are connected, and described power end reverse connecting protection module is connected with 7 pin of driving chip U1; The driving chip U2 that described second half-bridge driven module is BTN8962TA by model is formed, 2 pin, 3 pin of described second predrive module and driving chip U2 are connected, 5 pin, 6 pin of described second load diagnostic module and driving chip U2 are connected, and described power end reverse connecting protection module is connected with 7 pin of driving chip U2; 4 pin of described driving chip U1 and 4 pin of driving chip U2 are used for drive motors.
Particularly, described first half-bridge driven module also comprises resistance R9, electric capacity C12, electric capacity C6, electric capacity C9 and electric capacity C11, one end of described resistance R9 is connected with 4 pin of driving chip U1, its other end is connected with one end of electric capacity C12, the other end of described electric capacity C12 is connected and ground connection with one end of electric capacity C11, the other end of described electric capacity C11 is connected with one end of electric capacity C9, the other end of described electric capacity C9 is connected with 7 pin of driving chip U1, one end of described electric capacity C6 is connected with 7 pin of driving chip U1, its other end ground connection; Described first half-bridge driven module also comprises resistance R10, electric capacity C13, electric capacity C7, electric capacity C10 and electric capacity C8, one end of described resistance R10 is connected with 4 pin of driving chip U2, its other end is connected with one end of electric capacity C13, the other end of described electric capacity C13 is connected and ground connection with one end of electric capacity C10, the other end of described electric capacity C10 is connected with one end of electric capacity C8, the other end of described electric capacity C8 is connected with 7 pin of driving chip U2, one end of described electric capacity C7 is connected with 7 pin of driving chip U2, its other end ground connection; Electric capacity C6, C7 are used for the High frequency filter of half-bridge driven chip, R9 and C12, R10 and C13 form power supply moment arc-absorption circuit, and electric capacity C9 and C11, C8 and C10 are used for filtering motor interference signal.
Particularly, described first predrive module comprises resistance R3, resistance R5 and resistance R7, described resistance R5 one end connects and is connected with control module, resistance R3 one end, the other end of described resistance R5 is connected with 3 pin of driving chip U1, described resistance R3 other end ground connection, one end of described resistance R7 is connected with control module, and its other end is connected with 2 pin of driving chip U1; Described second predrive module comprises resistance R4, resistance R6 and resistance R8, described resistance R6 one end connects and is connected with control module, resistance R4 one end, the other end of described resistance R6 is connected with 3 pin of driving chip U2, described resistance R4 other end ground connection, one end of described resistance R8 is connected with control module, and its other end is connected with 2 pin of driving chip U2.
Particularly, described first load diagnostic module comprises resistance R11 and resistance R12; 6 pin of described driving chip U1 are connected with control module, and one end of described resistance R11 is connected with 6 pin of driving chip U1, and its other end is connected and ground connection with one end of resistance R12, and the other end of described resistance R12 is connected with 5 pin of driving chip U1; Described second load diagnostic module comprises resistance R13 and resistance R14; 6 pin of described driving chip U2 are connected with control module, one end of described resistance R13 is connected with 6 pin of driving chip U2, its other end is connected and ground connection with one end of resistance R14, the other end of described resistance R14 is connected with 5 pin of driving chip U2, the preferred package of resistance R11, R13 is 1206, resistance is 5.1k, precision 1%.
When reverse power connection appears in large-current electric drive circuit power end and earth terminal, the metal-oxide-semiconductor of P raceway groove is in cut-off state, realizes H bridge driver module motor and drives reverse connecting protection, avoid burning of circuit loop; When the load open circuit of large-current electric drive circuit, control module is by load diagnostic module, and the current status of monitoring load, identifies whether load opens a way, and realizes the open circuit diagnosis of load; When large-current electric drive circuit output overcurrent, control module is by load diagnostic module, and the current status of monitoring load, identifies load whether overcurrent, realize overcurrent protection and the diagnosis of load; When large-current electric drive circuit output short-circuit, control module is by load diagnostic module, and the current status of monitoring load, identifies load whether short circuit, realize short-circuit protection and the diagnosis of load; When the feeder ear overvoltage of large-current electric drive circuit; the impulse train interference that absorption power supply enters by power end reverse connecting protection module; the circuit such as protection H bridge driver module; realize power end overvoltage protection; while realizing H bridge driver module; solve H bridge driver module output overcurrent, problem that output short-circuit, output open circuit, ESD bring, improve the reliability of big current motor drive power supply end reverse connection prevention protection circuit immunity to interference and controller work.
Described in the present invention, concrete case study on implementation is only better case study on implementation of the present invention, is not used for limiting practical range of the present invention, and namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, all should as technology category of the present invention.
Claims (7)
1. the large-current electric drive circuit of the anti-reverse protection of power end, it is characterized in that, comprise control module, power module, power end reverse connecting protection module, the first half-bridge driven module, the second half-bridge driven module, the first predrive module, the second predrive module, the first load diagnostic module and the second load diagnostic module, described power end reverse connecting protection module comprises P channel MOS tube, described power module is connected with the source electrode of P channel MOS tube, the grounded-grid of described P channel MOS tube, the drain electrode of described P channel MOS tube and the first half-bridge driven module, the power end of the second half-bridge driven module connects, described first half-bridge driven module and the second half-bridge driven module form H bridge driver module and are used for drive motors, described control module and the first predrive module, second predrive model calling, described first predrive module and the first half-bridge driven model calling, described second predrive module and the second half-bridge driven model calling, described first half-bridge driven module is connected with the first load diagnostic module, described first load diagnostic module is connected with control module, described second half-bridge driven module is connected with the second load diagnostic module, described second load diagnostic module is connected with control module, the earth terminal of described first half-bridge driven module and the second half-bridge driven module is used for ground connection.
2. the large-current electric drive circuit of the anti-reverse protection of a kind of power end as claimed in claim 1, it is characterized in that, described power end reverse connecting protection module comprises High frequency filter unit, input Overvoltage protecting unit, output over-voltage protection unit, exports voltage regulation unit, resistance unit and absorbing circuit unit; Described High frequency filter unit is connected with input Overvoltage protecting unit; described input Overvoltage protecting unit is connected with the source electrode of P channel MOS tube; described absorbing circuit unit be connected to P channel MOS tube source electrode and drain electrode between; described resistance unit one end is connected with the grid of P channel MOS tube; its other end ground connection; described output over-voltage protection unit is connected between the drain and gate of P channel MOS tube, and described output voltage regulation unit is connected with the drain electrode of P channel MOS tube.
3. the large-current electric drive circuit of the anti-reverse protection of a kind of power end as described in claim 1 or 2, it is characterized in that, described High frequency filter unit comprises electric capacity C2 and electric capacity C5, described input Overvoltage protecting unit comprises TVS pipe TVS2, described output over-voltage protection unit comprises TVS pipe TVS1 and electric capacity C4, described output voltage regulation unit comprises electrochemical capacitor E1 and electric capacity C3, and described resistance unit comprises resistance R2, and described absorbing circuit unit comprises resistance R1 and electric capacity C1; The source electrode of described P channel MOS tube is connected with one end of electric capacity C2, and the other end of described C2 is connected with one end of electric capacity C5, the other end ground connection of described electric capacity C5; One end of described TVS pipe TVS2 is connected with the source electrode of P channel MOS tube, other end ground connection, described resistance R1 connects with electric capacity C1, in parallel and the one common port of described electrochemical capacitor E1 and electric capacity C3 is connected with the drain electrode of P channel MOS tube, its another common end grounding, described resistance R2 is connected with the grid of P channel MOS tube, its other end ground connection, in parallel and the one common port of described TVS pipe TVS1 and electric capacity C4 is connected with the drain electrode of P channel MOS tube, and its another common port is connected with the grid of P channel MOS tube.
4. the large-current electric drive circuit of the anti-reverse protection of a kind of power end as described in claim 1 or 2, it is characterized in that, the driving chip U1 that described first half-bridge driven module is BTN8962TA by model is formed, 2 pin, 3 pin of described first predrive module and driving chip U1 are connected, 5 pin, 6 pin of described first load diagnostic module and driving chip U1 are connected, and described power end reverse connecting protection module is connected with 7 pin of driving chip U1; The driving chip U2 that described second half-bridge driven module is BTN8962TA by model is formed, 2 pin, 3 pin of described second predrive module and driving chip U2 are connected, 5 pin, 6 pin of described second load diagnostic module and driving chip U2 are connected, and described power end reverse connecting protection module is connected with 7 pin of driving chip U2; 4 pin of described driving chip U1 and 4 pin of driving chip U2 are used for drive motors.
5. the large-current electric drive circuit of the anti-reverse protection of a kind of power end as claimed in claim 4, it is characterized in that, described first half-bridge driven module also comprises resistance R9, electric capacity C12, electric capacity C6, electric capacity C9 and electric capacity C11, one end of described resistance R9 is connected with 4 pin of driving chip U1, its other end is connected with one end of electric capacity C12, the other end of described electric capacity C12 is connected and ground connection with one end of electric capacity C11, the other end of described electric capacity C11 is connected with one end of electric capacity C9, the other end of described electric capacity C9 is connected with 7 pin of driving chip U1, one end of described electric capacity C6 is connected with 7 pin of driving chip U1, its other end ground connection, described first half-bridge driven module also comprises resistance R10, electric capacity C13, electric capacity C7, electric capacity C10 and electric capacity C8, one end of described resistance R10 is connected with 4 pin of driving chip U2, its other end is connected with one end of electric capacity C13, the other end of described electric capacity C13 is connected and ground connection with one end of electric capacity C10, the other end of described electric capacity C10 is connected with one end of electric capacity C8, the other end of described electric capacity C8 is connected with 7 pin of driving chip U2, one end of described electric capacity C7 is connected with 7 pin of driving chip U2, its other end ground connection.
6. the large-current electric drive circuit of the anti-reverse protection of a kind of power end as claimed in claim 5, it is characterized in that, described first predrive module comprises resistance R3, resistance R5 and resistance R7, described resistance R5 one end connects and is connected with control module, resistance R3 one end, the other end of described resistance R5 is connected with 3 pin of driving chip U1, described resistance R3 other end ground connection, one end of described resistance R7 is connected with control module, and its other end is connected with 2 pin of driving chip U1; Described second predrive module comprises resistance R4, resistance R6 and resistance R8, described resistance R6 one end connects and is connected with control module, resistance R4 one end, the other end of described resistance R6 is connected with 3 pin of driving chip U2, described resistance R4 other end ground connection, one end of described resistance R8 is connected with control module, and its other end is connected with 2 pin of driving chip U2.
7. the large-current electric drive circuit of the anti-reverse protection of a kind of power end as claimed in claim 6, is characterized in that, described first load diagnostic module comprises resistance R11 and resistance R12; 6 pin of described driving chip U1 are connected with control module, and one end of described resistance R11 is connected with 6 pin of driving chip U1, and its other end is connected and ground connection with one end of resistance R12, and the other end of described resistance R12 is connected with 5 pin of driving chip U1; Described second load diagnostic module comprises resistance R13 and resistance R14; 6 pin of described driving chip U2 are connected with control module, and one end of described resistance R13 is connected with 6 pin of driving chip U2, and its other end is connected and ground connection with one end of resistance R14, and the other end of described resistance R14 is connected with 5 pin of driving chip U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045635.2A CN105552840A (en) | 2016-01-21 | 2016-01-21 | Large current motor driving circuit with power end protected from back connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045635.2A CN105552840A (en) | 2016-01-21 | 2016-01-21 | Large current motor driving circuit with power end protected from back connection |
Publications (1)
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| CN105552840A true CN105552840A (en) | 2016-05-04 |
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| CN201610045635.2A Pending CN105552840A (en) | 2016-01-21 | 2016-01-21 | Large current motor driving circuit with power end protected from back connection |
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| CN107070226A (en) * | 2017-06-06 | 2017-08-18 | 成都奔月电子技术有限公司 | A kind of DC DC Switching Power Supplies |
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