Impact of capacitor on operating characteristics of single-phase motor

The permanent-split capacitor motor is well known for its good power factor, due to the permanently connected capacitor, and low starting torque. Therefore, this paper sets an extensive analysis of the impact of the capacitor size on motor starting and running characteristics. A model of the motor suitable for computer design is set, based on producer’s data. For various capacitors, all motor parameters and characteristics are calculated. The capacitor size affects the starting torque i.e. the bigger capacitor, the higher the motor starting torque. FEM is applied for computing flux density distribution and motor torque for all motor models. Adequate conclusions from obtained results of all models have been derived.