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

Tiago José dos Santos Moraes (1) , Ngac Ky Nguyen (1) , Eric Semail (1) , Fabien Meinguet (2) , Mael Guerin (3)

1 L2EP - Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697
2 TAS - Thales Alenia Space [Toulouse]
3 TAES - THALES Avionics Electrical Systems

This paper analyzes two fault-tolerant dualmultiphase motor drives, a series connected topology and a standard H-bridge topology. Previous studies have shown that the 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 strategies analyzed 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 voltage and 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.

Mots clés: series connected; multiphase dual-motor; fault-tolerant; control strategy; short-circuit fault

Domaines: Electronique; Energie électrique

Tiago José dos Santos Moraes, Ngac Ky Nguyen, Eric Semail, Fabien Meinguet, Mael Guerin. Dual-Multiphase Motor Drives for Fault- Tolerant Applications: Power Electronic Structures and Control Strategies. IEEE Transactions on Power Electronics, 2017, pp.1-1. ⟨10.1109/TPEL.2017.2671907⟩. ⟨hal-01529658⟩