双凸极电机全桥变换器单相开路故障容错方案

电机驱动系统中变换器是最薄弱、故障出现率最高的环节，故障后电机运行在非平衡状态，长时间工作将导致电机损坏，使整个系统丧失工作能力。因此对驱动系统变换器故障的检测、诊断是提高系统可靠性，实现容错运行的关键。该文对电励磁双凸极电机驱动系统的全桥变换器单相故障进行了分析，对各种故障状态进行了分类；通过将故障桥臂切除，重构系统变换器，使驱动系统能够故障后容错运行，并能够维持系统的输出特性。实验验证了该容错方案能够实现驱动系统从故障状态到容错运行的平滑、可靠切换，有效提高了系统的可靠性。

Project on Single Phase Open-circuit Fault Tolerance of Doubly Salient Electro-magnet Motor Driven by Full-bridge Converter

Inverter is the weakest part of the motor drives, when the drive operates in unbalanced conditions under faults, it would cause serious problems. In order to improve drive's reliability, the fault tolerance is proposed and being realized following key steps such as fault detection, fault identification and fault isolation. The paper first analyzes the open phase faults of doubly salient electro-magnet motor (DSEM) drives, and classifies the various fault states. The proposed fault tolerance system provides compensation to maintain the performance of the drives for open-circuit faults in power inverter. The drive system after fault identification is reconstructed by the four-switch three-phase topology. The fault tolerance system quickly recovers the control performance after short detecting time. Experiments confirm the feasibility of the proposed fault tolerance system.