This paper proposes a novel and robust method of sensorless speed control using deadbeat observer for an interior permanent magnet synchronous motor (IPMSM). The proposed uses to estimate the extended electromotive force (EEMF) in rotational coordinate system. estimated EEMF is used IPMSM velocity estimation algorithm. (DEEMFO) shows greater robustness compared reconstructor, which estimates by...

The mechanism of torque ripple generation by time and space harmonic magnetic fields in permanent magnet synchronous motors is investigated to obtain advanced motor designs. general expression between the ripples air-gap flux densities derived using Maxwell stress tensor. Both numerical experimental verifications this are carried out. By expression, difference surface interior discussed. Based ...

A permanent magnet assistance synchronous reluctance motor can start directly with a net voltage or power converter via torque control method. However, this has usually higher irreversible demagnetization level in comparison interior motors, due to the fewer magnets rotor slots. In order cope disadvantage, different arrangements of line-start are proposed paper. The V shape taking skewed slots ...