Authors : Mazen M. A. Al Ibraheemi and Fatih J. Anayi
Abstract: This study presents a novel encoderless method to ensure an optimum energising sequence to stator windings of PM machines. The work strategy was achieved through exploiting the machine terminal voltages to obtain an approximate estimation for N-pole position of the rotor permanent magnet, PM. Implementation of the proposed technique based on injection of short duration signals into the machine stator windings and monitoring the corresponding voltage responses at the machine terminals. Then, the responses were employed in dividing the 360 degrees of rotor whole space into domains. A MATLAB model was built to achieve the proposed concept and to define the domain number at which the rotor is halting. Thereby, the optimum standstill excitation sequence for stator windings, commutation process, was defined.
Mazen M. A. Al Ibraheemi and Fatih J. Anayi, 2019. Optimum Standstill Electronic Commutation Process for Encoderless PM Machines. Journal of Engineering and Applied Sciences, 14: 8933-8939.