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In this paper, the speed control for two series-connected five-phase permanent magnet synchronous motors (PMSMs) is first proposed where both speeds of two five-phase PMSMs can be controlled independently without any position sensors. In first, the concept of the extended electromotive force (EEMF) developed for single motor is extended for two series-connected five-phase PMSMs. Some experimental...
Recently, the advantage of multiphase drive (>3) is demonstrated by a novel system composed of series-connected five-phase induction motors (IMs) and single inverter where their IM windings are connected in series. Due to the additional degree of freedom provided by five-phase AC motors, two IM speeds can be regulated independently. In this paper, high-efficiency series-connected five-phase permanent...
This paper addresses the position sensorless control for brushless DC motor (BDCM) with repetitive position-dependent load torque which is a function of the absolute rotor position (not incremental rotor position). The robust sensorless control is composed of sensorless control and robust speed control. In order to commutate winding currents, the former one estimates the incremental rotor positions...
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