LIN, T. and ZHU, Z., 2015. Sensorless operation capability of surface-mounted permanent-magnet machine based on high-frequency signal injection methods. IEEE Transactions on Industry Applications, 51 (3), pp.2161-2171.
This paper analyzes the sensorless operation capability
of a surface-mounted permanent-magnet (PM) (SPM) machine
based on high-frequency (HF) voltage injection techniques. To
investigate the machine saliency, the magnetic saturation-induced
rotor saliency by PM is experimentally measured and analyzed
under various load conditions. Moreover, the influence of crosssaturation
and the magnetic polarity identification are also
examined. Furthermore, the investigation has considered the
resistance-based saliency due to HF eddy-current loss. In order
to highlight the effectiveness of the sensorless operation capability,
the tests are carried out under different operating conditions.