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This paper provides an overview of the progress in sensorless permanent magnet synchronous machine (PMSM) control techniques in Japan. In the first stage, the techniques extracted rotor position information by back-EMF zero-crossing detection techniques. Since around 2000, model-based position-sensorless control techniques have been evolved and are widely used in home appliances as well as general...
This paper proposes a new flux-barrier design to reduce the torque ripple of the concentrated-winding interior permanent magnet (IPM) motor under saliency-based sensorless drive. It is based on the combinations of the V-shape-magnet and the circular flux-barrier at the rotor-yoke in the center of the N-pole and S-pole. It is applied to 45 Nm-5.5 kW industrial drive IPM motor to fulfill the torque...
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