Design and Operation of DC Drive Using Class E Chopper

This paper presents the design and operation of dc drive using CLASS E chopper for both open loop and closed loop. Dc motor drives are widely used to control the speed for acceleration and deceleration. In this paper the speed of separately excited dc motor can be controlled from 0 to rated speed using chopper. The chopper firing circuit receives signal from controller and the chopper responds by providing variable voltage to the armature of the motor for achieving desired speed. There are two control loops, one for controlling current and another for speed. The controller used is Proportional-Integral type which ceases the delay and provides fast control. In this way, the Modelling of separately excited DC motor is done. After obtaining the complete model of the system, it is simulated using MATLAB (Simulink) in open loop and closed loop. The simulation of DC motor drive is done and analysed and the hardware implementation of the four quadrant dc drive using chopper is done.