多相电驱重构型车载充电系统绕组开路故障诊断与容错控制

电动汽车(EV)用电驱重构型车载充电系统(EDROC)因其突出的商业价值成为国内外学者的研究焦点。文中针对六相EDROC充电模式中单相绕组开路故障条件下的故障诊断与容错控制进行研究。首先，介绍了六相EDROC的电路拓扑与基本工作原理；其次，针对绕组开路故障问题，提出一种简单易行的故障诊断方法，包括故障检测与故障定位两个环节，分别通过判断电流矢量的角度变化率与绕组电流平均极性实现；然后，研究了系统单相开路故障下的容错控制，通过重新分配绕组电流幅值与相位，实现网侧电流平衡与无旋转磁场；最后，搭建了实验平台，实验结果验证了所提故障诊断方法与容错控制的正确性。

Open-circuit fault diagnosis scheme and fault-tolerant control of multiphase electric-drive-reconstructed onboard charger

Owing to the outstanding commercial value, electric-drive-reconstructed onboard chargers (EDROCs) have been a hotspot of research in electric vehicle (EV) field. This paper studies the fault diagnosis scheme and fault-tolerant control of a six-phase EDROC, considering the single-phase open-circuit condition. At first, the circuit topology and the basic operation principle of the six-phase EDROC are explained. Then, a simple fault diagnosis scheme is proposed for the open-circuit fault. The proposed scheme is composed of two parts, namely the fault detection and the fault localization, which are realized by estimating the derivative of the phase of winding current vector and judging the polarity of winding currents, respectively. Thereafter, the fault-tolerant control of the considered single-phase open-circuit fault is concerned. The amplitudes and phases of stator currents are adjusted, acquiring the purposes of balanced grid currents and non-generation of rotating filed. At last, an experimental test rig is built and the results verify the fault diagnosis scheme and the fault-tolerant control proposed in this work.