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Torque Optimization of a Seven-Phase Bi-harmonic PMSM in Healthy and Degraded Mode

Conférence invitée
Author
ZHANG, Hao
26886 Shandong University
ZHAO, Benteng
26886 Shandong University
GONG, Jinlin
26886 Shandong University
XU, Yanliang
26886 Shandong University
VU, Duc Tan
ccSEMAIL, Eric
DOS SANTOS MORAES, Tiago José
NGUYEN, Ngac Ky
13338 Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 [L2EP]

URI
http://hdl.handle.net/10985/16155
Date
2019

Abstract

Compared to sinusoidal machines, a bi-harmonic machine (with only two harmonics of similar value in the electromotive force spectrum) can develop torque of comparable values under three kinds of supply: with only first or both first and third sinusoidal currents. Therefore, more degrees of freedom for the control of the machine can be achieved. In this paper, the specificities of a 7-phase bi-harmonic permanent magnet synchronous machine (PMSM) are investigated under different control strategies, such as maximum torque per ampere (MTPA) at low speed and fluxweakening strategies at high speed, both in healthy and faulty operation modes. The fault with one open-circuited phase are taken into account. The current references are calculated in order to maximize the output torque under the constraint on both voltage and current. The performances of the considered machine is validated by numerical results.

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