An open-end winding induction motor drive system fed by two boost inverters with fault-tolerant capability is presented to improve the reliability and safety of the drive system. The boost inverters consist of an impedance-source network and a two-level inverter. It can realize the boost/buck function. An analysis of its fault-tolerance is presented in detail. Short circuits and open circuits are commonly considered as the two main types of faults. Therefore, the fault types of the dual boost inverters are analyzed and diagnosed. Then, two different fault-tolerant schemes are presented. The presented fault-tolerant inverters are restructured through the power switch itself. In addition, different SVPWM methods are addressed. A simulation model and an experimental platform are constructed. Simulation and experimental results verify the fault tolerance of the drive system.

为了提高驱动系统的可靠性和安全性，提出了一种由两个具有容错能力的升压逆变器供电的开放式绕组感应电动机驱动系统。升压逆变器由一个阻抗源网络和一个两级逆变器组成。它可以实现升压/降压功能。详细介绍了其容错性。短路和开路通常被认为是故障的两种主要类型。因此，对双升压逆变器的故障类型进行了分析和诊断。然后，提出了两种不同的容错方案。提出的容错逆变器通过电源开关本身进行了重组。另外，解决了不同的SVPWM方法。建立了仿真模型和实验平台。