New Technique for Maximum Efficiency of Induction Motors Based on Particle Swarm Optmization (PSO)

This paper presents the application of PSO for losses and operating cost minimization control in the induction motor drives. In this paper, Maximum Efficiency Strategy for induction motor speed control is proposed. The proposed technique is based on the principle that the flux level in a machine can be adjusted to give maximum efficiency for a given value of speed and load torque. The main advantages of the proposed technique are; its simple structure and its straightforward verification of maximum efficiency of induction motor for a given load torque and rotor speed. As will be demonstrated, PSO is so efficient in finding the optimum operating machine's flux level. The optimum flux level is a function of the machine load and speed requirements. Simulation results show that a considerable energy and cost savings is achieved in comparison the proposed strategies with the field oriented control and the conventional methods of operation under the condition of constant voltage to frequency ratio.