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针对深圳地铁车辆在运营中出现PA箱逆变器外部风扇控制失败的问题,结合电路控制原理分析了原因,提出了增加了双向隔离二极管的解决措施。
Aiming at the problem that the external fan of PA box inverter failed to control during the operation of Shenzhen metro vehicle, the reasons for the failure of external fan control of PA box inverter were analyzed. The countermeasures of adding the bidirectional isolating diode were put forward.