Dual-Multiphase Motor Drives for Fault- Tolerant Applications: Power Electronic Structures and Control Strategies

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dos Santos Moraes, Tiago José | Nguyen, Ngac Ky | Semail, Eric | Meinguet, Fabien | Guerin, Mael

Edité par HAL CCSD ; Institute of Electrical and Electronics Engineers

International audience. This paper analyzes two fault-tolerant dualmultiphase motor drives, a series connected topology and a standard H-bridge topology. Previous studies have shown thatthe series connected topology is appropriate to an aerospace application and has lower peak current in degraded mode in comparison with the H-bridge topology, which may consequently diminish the system’s weight and cost. This paper extends the study to compare different control strategies of these structures under two fault conditions: short-circuit of an inverter’s switch and an open-phase of the machine. The control strategiesanalyzed in this paper do not impact the fundamental current or the torque generation, but the amplitudes of some harmonics in degraded mode are expected to be narrowed down in order to reduce the inverter’s size. Some analyses of maximum voltageand peak current in degraded mode have been used for inverter dimensioning. Experimental results are shown and compared to the simulated ones to confirm the validity of this study.

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