ANN CONTROLLED ENERGY SAVER FOR INDUCTION MOTOR DRIVE

Abstract

In this paper, a new model for single phase induction motor is presented. A neural network based control scheme using pulse width modulation technique is developed. It is used to implement the energy-saving scheme of single-phase Induction motosr when they operate under no load or small duty ratio load. The intention is to gather the information to decide possible installation scheme to save the energy in plants using induction motors. At no load, 58% of energy can be saved and the savings decrease with the increase in load. The neural network is trained to estimate the required voltage for different load conditions. To train the neural network a simulation program is written to obtain the duty ratio values for different load conditions. The need to improve the quality and reliability of the drive circuit is increased because of the growing demand in improving the performance of motor drives. With the increased availability of MOSFETs and IGBTs, PWM AC choppers can be used efficiently in low and medium power applications. From the simulation studies, it is seen that Pulse Width Modulated (PWM) AC chopper system has reduced harmonics than the Phase controlled AC chopper system and hence it is used in the present work. The energy can be saved using the proposed system.