Abstract：This paper analyzes the mathematical model of the interior permanent-magnet synchronous motors (IPMSM). Through the mathematical deformation,the paper proposes the new sensorless method based on sliding mode observer for a IPMSM. The model is only associated with the q-axis inductance,and without the d-axis inductance. Dual filter is set series to extract the electromotive force information,and then filter phase shift is measured real-time at different speeds for angle compensation. An I-F strategy is adopted to start the IPMSM with compressor load. Finally,the experimental proves the validity of all the control strategies.
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2013, Vol. 28 
