电机控制器及汽车

Abstract

本实用新型公开了一种电机控制器及汽车，电机控制器包括电源输入端，电源输入端用于接入低压电池模块；电源输出端，电源输出端用于接入电磁离合器的电源端；电源电路，电源电路的第一端与电源输入端连接，电源电路的第二端与电源输出端连接；第一开关电路，第一开关电路串联设置于电源输入端和电源输出端之间的回路中；电源电路用于对经电源输入端接收到的低压电池模块输出的电池电压进行电压处理后经电源输出端输出至电磁离合器的电源端；短路检测电路，短路检测电路的检测端与电源输入端和电源输出端之间的通路电连接，短路检测电路与第一开关电路的受控端连接。本实用新型旨在提高低压电池模块的供电稳定性。

Claims

1. A motor controller applied to an automobile, the automobile including a low-voltage battery module, an electromagnetic clutch, and a motor, the motor controller including a control circuit and a motor drive circuit, the power supply terminal of the control circuit being electrically connected to the low-voltage battery module, and the motor drive circuit being electrically connected to both the control circuit and the motor, characterized in that, The motor controller also includes: A power input terminal is used to connect a low-voltage battery module. A power output terminal, which is used to connect to the power supply terminal of the electromagnetic clutch; A power supply circuit, wherein a first terminal of the power supply circuit is connected to the power input terminal, and a second terminal of the power supply circuit is connected to the power output terminal; A first switching circuit is connected in series in the loop between the power input terminal and the power output terminal; The power supply circuit is used to process the battery voltage received from the low-voltage battery module at the power input terminal and then output it to the power supply terminal of the electromagnetic clutch at the power output terminal. A short-circuit detection circuit, wherein the detection terminal of the short-circuit detection circuit is electrically connected to the path between the power input terminal and the power output terminal, and the short-circuit detection circuit is connected to the controlled terminal of the first switching circuit; The short-circuit detection circuit is used to control the first switching circuit to disconnect the circuit between the power input terminal and the power output terminal when a short-circuit fault is detected in the circuit between the power input terminal and the power output terminal.

2. The motor controller of claim 1, wherein, The short-circuit detection circuit includes: Main control circuit; A voltage detection circuit is provided, wherein the detection terminal of the voltage detection circuit is electrically connected to the path between the power input terminal and the power output terminal, and the output terminal of the voltage detection circuit is electrically connected to the main control circuit. The voltage detection circuit is used to detect the voltage on the path between the power input terminal and the power output terminal and output a corresponding voltage detection signal. The main control circuit is used to control the first switching circuit to disconnect the circuit between the power input terminal and the power output terminal when a short circuit fault is detected in the circuit between the power input terminal and the power output terminal based on the voltage detection signal. And / or, Main control circuit; The first current detection circuit is used to detect the first current in the loop between the power input terminal and the power output terminal, and output a corresponding first current detection signal. The main control circuit is used to control the first switching circuit to disconnect the circuit between the power input terminal and the power output terminal when a short circuit fault is detected in the circuit between the power input terminal and the power output terminal based on the first current detection signal.

3. The motor controller of claim 2, wherein, The first current detection circuit includes: A first resistor, the first end of which is connected to the second end of the power supply circuit, and the second end of which is connected to the power supply output terminal; The main control circuit is electrically connected to the first resistor. The main control circuit is used to determine the first current based on the voltage drop across the first resistor, and to control the first switching circuit to disconnect the circuit between the power input terminal and the power output terminal when a short circuit fault occurs in the circuit between the power input terminal and the power output terminal based on the first current.

4. The motor controller of claim 2, wherein, The main control circuit and the control circuit are the same circuit.

5. The motor controller of claim 1, wherein, The first switching circuit includes: A first switching transistor and a second switching transistor are connected. The input terminal of the first switching transistor is connected to the power input terminal, the output terminal of the first switching transistor is connected to the first terminal of the power supply circuit, the controlled terminal of the first switching transistor is connected to the input terminal of the second switching transistor, the controlled terminal of the second switching transistor is electrically connected to the short circuit detection circuit, and the output terminal of the second switching transistor is grounded.

6. The motor controller of claim 1, wherein, The power supply circuit includes: A boost circuit is provided, wherein the input terminal of the boost circuit is connected to the power input terminal, and the output terminal of the boost circuit is connected to the power output terminal; the boost circuit is used to boost the battery voltage received from the low-voltage battery module at the power input terminal and then output it to the power output terminal.

7. The motor controller of any one of claims 1 to 6, wherein, The motor controller also includes: A drive output circuit is connected in series in the loop between the power supply circuit and the power output terminal. The drive output circuit is used to receive the current output by the power supply circuit and drive the electromagnetic clutch to work.

8. The motor controller of claim 7, wherein, The power output terminal includes a positive connection terminal and a negative connection terminal, the power supply terminal of the electromagnetic clutch includes a positive power supply terminal and a negative power supply terminal, the positive connection terminal is connected to the positive power supply terminal, and the drive output circuit includes: A second switching circuit is connected in series in the loop between the power supply circuit and the positive terminal; or, the input terminal of the second switching circuit is connected to the negative terminal, and the output terminal of the second switching circuit is grounded. The second current detection circuit is used to detect the first current in the loop between the power input terminal and the positive terminal, and output a corresponding second current detection signal. The main control circuit is electrically connected to the output terminal of the second current detection circuit; the main control circuit is used to control the conduction duration / conduction frequency of the second switching circuit according to the second current detection signal, so as to adjust the first current to the target current.

9. The motor controller of claim 8, wherein, When the short-circuit detection circuit includes a first current detection circuit, and the first current detection circuit is used to detect a first current in the loop between the power input terminal and the power output terminal, the first current detection circuit and the second current detection circuit are the same current detection circuit.

10. An automobile characterized by comprising: Includes a low-voltage battery module, an electromagnetic clutch, a motor, and a motor controller as described in any one of claims 1 to 9; The low-voltage battery module is electrically connected to the motor controller, and the motor controller is also electrically connected to the electromagnetic clutch and the motor.

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