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新能源客车报驱动电机高温故障的排除方法

2024-06-18

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新能源客车驱动电机分交流异步电机和永磁同步电机,异步电机相对制造成本低,结构简单,依靠自带风叶散热,高转速低转矩时运行效率高,维修方便等优点,在新能源初期电动汽车上广泛应用。驱动电机随着使用年限和恶劣环境的影响,逐渐会出现故障,比如电机高温、绝缘现象等,是我们维修工经常碰到的问题。

电机温度异常排查思路:首先根据仪表报的故障,通过以上设备判断高温现象,在电机控制器还是电机确定后,进一步检查确定设备。

1、如果控制器高温,首先查看运行状态,控制器散热风机是否工作或堵塞,有损坏更换,如全不工作,查F213—10A保险、风扇控制板、接插件及内部温度传感器是否异常。

2、如果驱动电机温度异常,交流异步电机风能自散热,主要检查PT100温度传感器阻值,用红外测温仪查看电机实际温度与仪表显示温度是否相符,如不相符,可判定为温度传感器异常。

(来源:交通护驾)