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The paper describes a thermal model for a duplex three-phase induction machine for fault tolerant applications. Three-phase and six-phase variations of duplex three-phase machine operation under fault conditions are considered. Different winding configurations are investigated. Thermal analysis is performed using analytical and finite-element models. Experimental validation is presented for load operating...
Fractional-slot PM machines have several advantages, but they suffer from the high contents of space harmonics in the air-gap MMF distribution. The MMF space harmonic amplitude and frequency depend on the particular combination of number of slots and poles. Such harmonics induce losses in the rotor since they are not synchronous with the rotor speed. This paper compares two kind of machines with the...
The performance of a five-phase permanent-magnet (PM) motor is analyzed under postfault conditions. Proper current control strategies are adopted so as to guarantee safe drive operation after any fault occurrence. This paper covers three fault types: the open circuit condition of a single phase, the open circuit condition of two nonadjacent phases, and the open circuit condition of two adjacent phases...
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