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This paper presents a control scheme for three-phase PWM converters which have no ac-side voltage sensors. In spite of no source voltage sensors, the proposed method estimates exact grid angle and voltages, which are the essential parts for the power transfer between DC link of PWM converter and AC source. The method works not only in normal balanced AC source case but also in faulty unbalanced cases...
This paper presents an enhanced sensorless method to estimate rotor position for PMSM. The proposed method is based on the estimation of the back-EMF using a state observer. The conventional sensorless methods based on back-EMF estimation has problem of model discordance to the real motor model in electrical or mechanical dynamic state. An analysis is performed to verify how this problem deteriorates...
This paper proposes the control algorithm for a surface mounted permanent magnet synchronous motor (SMPMSM) drive system running at 116,000 r/min. Hall sensors are employed to measure the rotor position, and a speed observer is used to enhance the dynamic performance of the drive system. And in order to extend the output power capacity in the high-speed operating region, a flux-weakening controller,...
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