Traction motor current abnormity fault diagnosis method

The invention relates to the field of train control, in particular to a traction motor current abnormity fault diagnosis method. The invention provides a traction motor current abnormity fault diagnosis method, which comprises the following steps that a terminal unit of each carriage collects a motor current feedback value and idling information of a traction converter and sends the motor current feedback value and the idling information to a looped network; and the terminal unit of a bullet train compartment compares the collected motor current feedback value with a preset current threshold value, and carries out traction motor current abnormal fault diagnosis. According to the method, a train network control system diagnoses the current abnormity and idle running abnormity information of the motor from different dimensions in different modes, and the safety of the traction converter is guaranteed to the maximum extent. 本发明涉及列车控制领域，更具体的说，涉及一种牵引电机电流异常故障诊断方法。本发明提出的一种牵引电机电流异常故障诊断方法，包括以下步骤：每个车厢的终端单元，收集牵引变流器的电机电流