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This paper employs grain-oriented electrical steel (GOES) in an axial-flux switched reluctance motor (AFSRM) to improve its torque characteristic, taking advantages of the material's excellent magnetic properties in the rolling direction. Based on the study on the parameter and switching characteristics of an AFSRM, GOES can be divided into pieces and arranged in the rotor and stator teeth so that...
This paper proposes a control schema for permanent magnet machines, which is synthesized by field-oriented control, synchronous pulse width modulation and phase-lock loop based sampling synchronization. Switching frequency of inverters in electric locomotive applications is limited by considering switching losses. Lower switching frequency deteriorates performance of machines, e.g., extra machine...
This paper proposes a novel predictive duty ratio modulated direct torque control (DTC) for vernier permanent magnet synchronous motor drive to reduce the torque and flux ripples caused by hardware delay. Compared with DTC, conventional duty ratio modulated DTC (DDTC) can significantly reduce the torque and flux ripples, while hardware delay still deteriorates the performance of DDTC. This paper analyzes...
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