The invention provides a motor driving circuit, a motor driving device and a vehicle. The motor driving circuit comprises an H-bridge circuit and a current detection module. The current detection module comprises a processing unit and at least one temperature detection element. The at least one temperature detection element is configured to detect an operating temperature of a switching element in the H-bridge circuit. The processing unit is used for determining the conduction state of the switch elements in the H-bridge circuit according to the voltage difference between the two ends of each switch element in the H-bridge circuit; and determining the current between two nodes for setting the motor according to the conduction state of the switch element in the H-bridge circuit, the working temperature and the voltage difference between the two ends of the switch element. The embodiment of the invention can be applied to an intelligent vehicle or a new energy vehicle, can realize the measurement of the working current of the motor without setting a sampling resistor and an operational amplifier circuit, can reduce the material cost and the layout difficulty of a printed circuit board, and is also beneficial to the accurate judgment and effective response of a system fault.
本申请提供了一种电机驱动电路、电机驱动装置和车辆。该电机驱动电路包括H桥电路和电流检测模块;电流检测模块包括处理单元和至少一个温度检测元件。该至少一个温度检测元件用于:检测H桥电路中的开关元件的工作温度。该处理单元用于:根据H桥电路中的各开关元件两端的电压差,确定H桥电路中的开关元件的导通状态;根据H桥电路中的开关元件的导通状态、工作温度和以及其两端的电压差,确定用于设置电机的两个节点间的电流。本申请实施例可以应用于智能车辆或新能源车辆,能够在无需设置采样电阻以及运算放大电路的情况下实现对电机的工作电流的测量,能够降低物料成本、印刷电路板的布板难度,还有利于系统故障的准确判断和有效应对。
Motor driving circuit, motor driving device and vehicle
电机驱动电路、电机驱动装置和车辆
08.04.2025
Patent
Elektronische Ressource
Chinesisch
IPC: | G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / G01K MEASURING TEMPERATURE , Messen der Temperatur / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern |
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