Fault tolerant multiphase electrical drives: the impact of design*
L2EP ENSAM, 8 boulevard Louis XIV, 59046 Lille, France
Corresponding author: Xavier.Kestelyn@lille.ensam.fr
Accepted: 22 February 2008
Published online: 30 April 2008
This paper deals with fault tolerant multiphase electrical drives. The quality of the torque of a vector-controlled Permanent Magnet (PM) Synchronous Machine supplied by a multi-leg Voltage Source Inverter (VSI) is examined in normal operation and when one or two phases are open-circuited. It is then deduced that a seven-phase machine is a good compromise allowing high torque-to-volume density and easy control with smooth torque in fault operation. Experimental results confirm the predicted characteristics.
PACS: 84.50.+d – Electric motors / 07.10.Pz – Instruments for strain, force, and torque
© EDP Sciences, 2008