Abstract
This study proposes a novel high-performance rotor position estimator for an interior permanent magnet synchronous motor (PMSM). By suitably processing the mathematical model of the motor, a systematic method of the rotor position estimating method has been developed. The proposed control system can be used in the space vector pulse-width modulation switching method, which is widely used in industry. By measuring the DC-bus voltage and the phase currents, a systematic rotor position estimator has been developed. Finally, the rotor position and rotor speed are obtained, and a closed-loop control system can be achieved. A digital signal processor, TMS 320F2812, is used to execute the estimating algorithm and control algorithm. As a result, the hardware is very simple. Several experimental results show that both the position control system and the adjustable speed control system are achieved. The system can be adjusted from 1 to 2000 r/min. In addition, by using the proposed position-loop H∞ controller, the position control system can be achieved with satisfactory performance. This study proposes a new method for a sensorless interior PMSM control system.
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