Design and control of fault-tolerant permanent magnet machines

This paper discusses design and control techniques for fault tolerant permanent-magnet (PM) machines that are suitable for applications where safety is of paramount importance. Back-EMF based design and analysis approach for a multiphase air-core linear motor has been presented in this paper. Apart from the design approach, fault tolerant techniques for current control in both time and frequency domains have also been discussed. In time domain, an iterative learning based control method is also presented and is found to be very robust. Both open-circuit and short-circuit fault tolerant operation have been discussed in this paper.

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