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Fault-Tolerant Matrix Converter Motor Drives With Fault Detection of Open Switch Faults

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4 Author(s)
Khwan-on, S. ; Dept. of Electr. & Electron. Eng., Machines & Control Group, Univ. of Nottingham, Nottingham, UK ; de Lillo, L. ; Empringham, L. ; Wheeler, P.

This paper describes a novel fault-tolerant matrix converter motor drive system which requires an appropriate control strategy and the application of an effective fault detection technique. Two types of fault-tolerant matrix converter, a direct matrix converter and an indirect matrix converter, are proposed for a permanent magnet synchronous motor drive against open-circuit faults in safety-critical applications. A fault-tolerant control strategy is developed in order to maintain the continuous operation of the drive system with satisfactory performance. A high-speed fault detection strategy for detecting and identifying the faulty open-circuited switches located in the fault-tolerant four-phase direct matrix converter is also proposed. Simulation and experimental results are shown to demonstrate the effectiveness of the proposed fault-tolerant matrix converters and the developed fault detection strategy applied to the motor drive system under faulty operating conditions.

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Industrial Electronics, IEEE Transactions on  (Volume:59 ,  Issue: 1 )