CN-224204763-U - Power-off anti-reverse control circuit, motor control circuit, module, system and vehicle

CN224204763UCN 224204763 UCN224204763 UCN 224204763UCN-224204763-U

Abstract

The utility model relates to the technical field of vehicle circuit control, in particular to a power-off anti-reverse control circuit, a motor control circuit, a module, a system and a vehicle. The direct current motor control circuit comprises a connector connected with a power supply, a diode D1, a bleeder tube Q1 and a pre-driver PreDrive, wherein the positive electrode of the diode D1 is connected with the connector, the negative electrode of the diode D1 is connected with a direct current motor control circuit, the bleeder tube Q1 is connected with the diode D1 in parallel, the pre-driver is connected with a direct current motor control circuit H bridge, the pre-driver is provided with a charge pump CP, and the charge pump is connected with the base electrode of the bleeder tube Q1 and the negative electrode of the diode D1 and used for controlling the bleeder tube Q1 to discharge the reverse electromotive force at two ends of the diode D1. According to the power-off anti-reverse control circuit, under the condition that an energy storage capacitor is not adopted, reverse high-voltage electromotive force is discharged through the other discharging channel, so that the safety of other elements of the whole control circuit board is ensured.

Inventors

LUO TAO
ZUO MIN
LIU FAXIANG
DING LIANG
HUANG SHAOTANG
YAN XIN
CHEN SHENG

Assignees

江铃汽车股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250320

Claims (9)

1. The utility model provides a outage prevents reverse control circuit which characterized in that is applied to motor control circuit, includes: A connector; Diode D1, connect connector and motor control circuit; a bleeder tube Q1 connected in parallel with said diode D1, And the pre-driver is connected with the motor control circuit, and is provided with a charge pump, and is respectively connected with the base electrode of the bleeder tube Q1 and the cathode of the diode D1 and used for controlling the bleeder tube Q1 to discharge the opposite electromotive forces at the two ends of the diode D1.
2. The power outage anti-reverse control circuit according to claim 1, wherein said bleeder Q1 is a MOSFET tube connected in parallel with said diode D1.
3. The power down anti-backup control circuit of claim 1, further comprising a bleeder circuit comprising a bleeder resistor connected to the connector and then to ground.
4. The power down anti-backup control circuit of claim 3, further comprising an isolation circuit comprising an opto-coupler isolator connected between the bleeder circuit and the connector.
5. A motor control circuit using the power-off anti-reverse control circuit according to any one of claims 1 to 4, wherein the motor control circuit comprises an H-bridge driving circuit, which is composed of four bridge arms, and each two bridge arms form a group of driving circuits; Each group of driving circuits is respectively connected with the diode D1 and the pre-driver so as to realize forward rotation or reverse rotation of the motor.
6. The motor control circuit of claim 5 wherein each set of drive circuits includes upper and lower leg connections of the same configuration.
7. A motor power-off anti-reverse control module, comprising a control circuit according to any one of claims 1 to 4 for controlling the motor power-off anti-reverse.
8. A motor power-off anti-reverse control system, comprising the motor power-off anti-reverse control module of claim 7, for controlling the motor power-off anti-reverse.
9. A vehicle carrying the motor power-off anti-reverse control system according to claim 8 for power-off anti-reverse control of a motor.

Description

Power-off anti-reverse control circuit, motor control circuit, module, system and vehicle Technical Field The utility model relates to the technical field of vehicle circuit control, in particular to a power-off anti-reverse control circuit, a motor control circuit, a module, a system and a vehicle. Background The existing tail gate control module (PLG) does not start a self-protection function when the assembly line is not connected with electricity, and the tail gate generates higher reverse electromotive force when the external force is rapidly closed, so that a body diode in a field effect transistor (MOS) on a main board of the tail gate control module is broken down. The method comprises the following steps: In the vehicle control system, the H-bridge circuit is a typical direct current motor control circuit and is commonly used for driving a motor, the H-bridge consists of two groups of four bridge arms, the motor is connected between the two groups of bridge arms, and the conduction of the four bridge arms is controlled through a pre-drive (PREDRIVER) so as to realize the forward and reverse rotation of the motor. The electronic components corresponding to the four bridge arms are four MOS tubes, however, the motor is an inductive load, so that the motor is easy to generate abrupt reverse load when being closed or opened. The reverse electromotive force generated by the motor in a 12V vehicle system is about 40 volts, and the high reverse electromotive force is not discharged, so that the damage to components on the board is easy to occur. Disclosure of utility model The present utility model aims to at least ameliorate one of the technical problems of the prior art. Therefore, the utility model provides a power-off anti-reverse control circuit, a motor control circuit, a module, a system and a vehicle. According to an embodiment of the first aspect of the utility model, a power-off anti-reverse control circuit is applied to a direct current motor control circuit, and comprises: a connector connected to a power source; The positive electrode of the diode D1 is connected with the connector, and the negative electrode of the diode D1 is connected with the direct current motor control circuit; a bleeder tube Q1 connected in parallel with said diode D1, The pre-driver is connected with the direct current motor control circuit and is provided with a charge pump, the charge pump is connected with the base electrode of the discharge tube Q1, and the charge pump is connected with the cathode of the diode D1 and used for controlling the discharge tube Q1 to discharge the opposite electromotive force at the two ends of the diode D1. In one possible technical solution, the switching element is a switching diode, which can be turned on and off in nanosecond level, and is suitable for high-frequency application, and can bear higher reverse voltage to prevent breakdown. In one possible technical solution, further, the bleeder Q1 is a MOSFET, an emitter of the bleeder Q1 is connected to an anode of the diode D1, a collector of the bleeder Q1 is connected to a cathode of the diode D1, and reverse electromotive forces at two ends of the diode D1 are bleeder by controlling conduction of the bleeder Q1, so that the diode D1 is protected to work normally. In one possible technical solution, the device further comprises a bleeder circuit, wherein the bleeder circuit comprises a bleeder resistor, and the bleeder resistor is grounded after being connected with the connector and is used for safely bleeding back electromotive force. In one possible technical solution, the circuit further comprises an isolation circuit, wherein the isolation circuit comprises an optical coupler isolator, and the optical coupler isolator is connected between the bleeder circuit and the connector for ensuring line safety. According to the power-off anti-reverse control circuit provided by the embodiment of the utility model, under the condition that an energy storage capacitor is not adopted, reverse high-voltage electromotive force is discharged through the other discharging channel, so that the safety of other elements of the whole control circuit board is ensured. According to the motor control circuit provided by the embodiment of the second aspect of the utility model, the power-off anti-reverse control circuit is adopted, wherein the motor control circuit comprises an H-bridge driving circuit, and consists of four bridge arms, each two bridge arms form a group of driving circuits, and each group of driving circuits is respectively connected with the diode D1 and the pre-driver so as to realize forward rotation or reverse rotation of the motor. In one possible technical solution, further, each group of driving circuits includes an upper bridge arm and a lower bridge arm which have the same structure, and each group of driving circuits includes an upper bridge arm and a lower bridge arm which have the same structure, wherein the upper brid