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Voltage phase control is a novel field-weakening scheme for PMSM which was reported as more stable in high speed region. This paper provides a current ripple reduce method and a frequency-compensation method. The current ripple reduce method deals with the problem that the voltage phase control has bigger current ripple compared to the tradition method. The frequency-compensation method decreases...
Permanent Magnet Synchronous Motor is characterized by high power density, high efficiency and high reliability, and it is superior in many applications. V/f control for PMSM is able to get rid of the expensive rotor position sensor, and it is of great research value. V/f control method for PMSM is investigated in this paper. Firstly, the reason for the instability of the traditional open-loop V/f...
A new sensorless control method for synchronous reluctance motor(SynRM) is proposed. The speed and rotor position estimation are based on the stator voltage equation. The speed is estimated using the stator voltage and current. The rotor position is obtained by the speed integral. The proposed method can only work in medium and high speed region, because the voltage amplitude is too small in low speed...
A current harmonics suppression method for permanent magnet synchronous motor drives is presented in this paper. The harmonic model of permanent magnet synchronous motor is analyzed. According to this harmonic model, the harmonic current can be estimated. The harmonic suppression method using PI or P controllers is then demonstrated. With the presented method, the current harmonics in d- and q- axis...
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