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Digital signal processing-based sensor-less permanent magnet synchronous motor driver with quasi-sine pulse-width modulation for air-conditioner rotary compressor

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7 Author(s)
Chern, T.-L. ; Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan ; Liu, L.-H. ; Pan, P.-L. ; Huang, T.-M.
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This study presented a sensor-less permanent magnet synchronous motor (PMSM) driver for controlling air-conditioner rotary compressor speed. In this study, a novel quasi-sine pulse-width modulation (PWM) driving method is proposed. Furthermore, the current feedback control scheme and rotor magnet pole position detection were included. The system structure was implemented using a digital signal processing (DSP) platform. The proposed driving scheme was compared with the square-wave driving without current feedback and six-step square-wave driving method with current feedback. Experimental results demonstrated that the proposed quasi-sine PWM driving method implemented in an air-conditioner compressor driver was capable of reducing the magnitude of rotational speed ripples, compressor vibration and system power consumption.

Published in:

Electric Power Applications, IET  (Volume:6 ,  Issue: 6 )