期刊
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
卷 68, 期 3, 页码 1949-1960出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2020.2975502
关键词
Circuit faults; Permanent magnet motors; Reluctance motors; Torque; Fault tolerance; Fault tolerant systems; Fault-tolerant control (FTC); five-phase permanent magnet synchronous motor (5Ph PMSM); oscillating neutral; phase voltage modulation (PVM); single-phase open fault
This study investigates the most elementary phase voltage modulation for a more generic five-phase permanent magnet synchronous motor drive under a single-phase open fault. By proposing a nonlinear transform to alleviate the influence of oscillating neutral on PVM, and comparing various approaches to cancel the need for phase voltage sensors, the study aims to fix the faulty inverter in practice. Experimental results confirm the superiority of the proposed PVM approaches.
This article investigates the most elementary phase voltage modulation (PVM) for a more generic five-phase permanent magnet synchronous motor drive under a single-phase open fault. Most works on this topic are intended for some specific motor types, and in most cases, it assumes the inverter can still be treated as a linear switching-mode power amplifier. This article figures out that due to an oscillating neutral, the phase voltage is unable to be linearly modulated, which is to say the simplest sinusoidal pulsewidth modulation is problematic to fit a newly developed well-decoupled model under single-phase open fault. To this end, a nonlinear transform incorporating the faulty phase voltage is theoretically proposed, which alleviates the influence of oscillating neutral on PVM, and several approaches to cancel the need for phase voltage sensors are comparatively investigated. Accordingly, the PVM with repetitive control and back electromotive force compensation is put forward to fix the faulty inverter in practice. Plausible PVM approaches are tested experimentally, and the superiority of the proposed PVM is confirmed by experimental results.
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