This paper investigates a new fault-tolerant strategy of a multi-phase multi-level ac motor drive. The proposed approach is based on four conventional 2-level threephase voltage source inverters (VSIs) supplying the open-end windings of a dual three-phase motor (asymmetric six-phase machine), quadrupling the power capability of a single VSI with given voltage and current ratings. The developed faulttolerant control algorithm is able to generate multi-level voltage waveforms, equivalent to the ones of a 3-level inverter, and to share the total motor power among the four dc sources within each switching period. The investigated ac motor drive has been numerically implemented and a complete set of simulation results, under healthy and for three degraded modes of the system, are given to prove the effectiveness of the whole strategy.

Fault-tolerant operating analysis of a quad-inverter multiphase multilevel AC motor drive

GRANDI, GABRIELE;FILIPPETTI, FIORENZO;ROSSI, CLAUDIO
2011

Abstract

This paper investigates a new fault-tolerant strategy of a multi-phase multi-level ac motor drive. The proposed approach is based on four conventional 2-level threephase voltage source inverters (VSIs) supplying the open-end windings of a dual three-phase motor (asymmetric six-phase machine), quadrupling the power capability of a single VSI with given voltage and current ratings. The developed faulttolerant control algorithm is able to generate multi-level voltage waveforms, equivalent to the ones of a 3-level inverter, and to share the total motor power among the four dc sources within each switching period. The investigated ac motor drive has been numerically implemented and a complete set of simulation results, under healthy and for three degraded modes of the system, are given to prove the effectiveness of the whole strategy.
8th IEEE Symposium on Diagnostics for Electrical Machines, Power Electronics & Drives
126
132
G. Grandi; Y. Gritli; F. Filippetti; C. Rossi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/144908
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