This article presents the operation of onboard integrated battery chargers tied to a nine-phase EV-drive train, shedding light on the charging performance during the postfault operation, when one or more faulty inverter legs are disconnected. The objective in that case is to ensure balanced grid currents, while maintaining minimum machine losses at zero average torque production. The proposed concept requires a minimalistic change from a control structure perspective to switch between the pre- and postfault cases. Limitations and fault cases are discussed and corroborated with experimental tests on a 1.5-kW prototype.The derived concept is parameter independent and applicable to nine-phase drives, irrespective of the type of rotor used.

中文翻译：

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通过九相电动汽车传动系统对车载集成式电池充电器进行故障后操作

本文介绍了与九相EV传动系绑定的车载集成式电池充电器的操作，当一个或多个有故障的逆变器支脚断开连接时，故障后操作期间的充电性能便会受到关注。在这种情况下，目的是确保平衡的电网电流，同时在零平均转矩产生时保持最小的机器损耗。从控制结构的角度来看，提出的概念需要进行最小的更改，以在故障前和故障后情况之间切换。讨论了极限和故障情况，并在1.5 kW原型机上进行了实验测试，得出的概念与参数无关，并且适用于九相驱动器，而与所用转子的类型无关。