Be used for motor diagnostic circuit of opening a way

The utility model discloses a be used for motor diagnostic circuit of opening a way, including H bridge drive module, diagnostic circuit and MCU, H bridge drive module's negative pole connecting resistance RL and diagnostic circuit, H bridge drive module's anodal connecting resistance RL, diagnostic circuit still connects MCU. The beneficial effects of the utility model are that: 1. H bridge drive module can realize the unilateral high limit of H bridge to be opened, detects when 2. This kind detects to the load inoperative, does not consider the short circuit situation owing to this circuit when 3. Judging, when the short circuit phenomenon takes place with the phenomenon of opening a way, need distinguish according to load current, therefore H bridge module had better have the current detection function. 本实用新型公开了种用于电机开路诊断的电路，包括H桥驱动模块、诊断电路和MCU，所述H桥驱动模块的负极连接电阻RL和诊断电路，H桥驱动模块的正极连接电阻RL，诊断电路还连接MCU。本实用新型的有益效果是：1.H桥驱动模块能实现H桥单边高边打开，2.此种检测为负载非运行时进行检测，3.由于此电路判断时并未考虑短路情形，短路现象和开路现象发生时，需要根据负载电流进行区分，因此H桥模块最好带有电流检测功能。