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This paper studies the magnetic stress and vibration characteristic of the permanent magnet assisted synchronous reluctance machine (PM-SynRM). Firstly, the frequency and spatial orders of radial stress are investigated by analytical equations. Then, two PM-SynRMs are designed, and their open-circuit and armature magnetic stresses are calculated by finite element method (FEM) and compared with the...
This paper describes a low cost sensorless switched reluctance motor (SRM) driver system based on gradient of phase current. The sensorless control method uses the change of the gradient of the phase current to detect the rotor position where the rotor pole and stator begin to overlap. At this position, phase inductance begins to increase. Voltage control is used in the zone near the position, and...
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