M.Bharathi1, M.Santhi 2
1PG student- Department of EEE – Sethu Institute of
Technology, Kariapatti, Tamilnadu, India.
2Professor - Department of EEE – Sethu Institute of
Technology, Kariapatti, Tamilnadu, India.
At present, most of
the electric vehicles are using BLDC motors for various advantages such as high
efficiency, compactness, easy controllability etc. But sometimes their
efficiency is poor due to the presence of cogging torque and minimized back
EMF, hence increasing THD level. The main aim of this work is to reduce the
cogging torque and maximize back EMF in order to optimize the rotor shape.
Although so many control strategies are employed for minimization of cogging
torque, we have used pole arc combination method in this proposed paper. This
method is done by Genetic Algorithm using MATLAB. Due to the magnetic
saturation and relative complex structure, the cogging torque in IPM brushless
machines is more complicated than that in the surface permanent magnet brushless
machines. Pole arc combination method offers a better alternative for cogging
torque reduction. The motor parameters are taken to do this process. Due to the
reduction of cogging torque, THD level is also decreased. In future, FEM
analysis is carried out to increasing back EMF.
