Multi-objective optimization of permanent magnet motor using Taguchi method

The performance of permanent magnet DC motor can be improved by optimization of its magnetic circuit. That can be achieved by means of finite element method in torque calculation and statistical analysis using orthogonal arrays and multi-objective approach. The magnetic field was calculated taking into account non-linear density and effect of current commutation. The electromagnetic torque was determined from magnetic vector potentials of moving conductors. The effect of change for every geometric parameter was particularly calculated. A fast improvement in shapes of the motor magnetic parts was achieved by an appropriate number of field and torque calculations.