Design and Implementation of DC Motor Drive

Abstract

DC drives are widely used in application requiring adjustable speed, good speed regulation, frequent starting, breaking and reversing. DC motors have variable characteristic and are used extensively in variable speed drives. The methods of speed control are normally simpler and less expensive than those used for AC drives. DC motor plays a significant role in modern industries. This report demonstrates the DC motor basics and design of the DC motor drive system using TMS320F2811. Simulation of control of DC motor drive with various dynamic performances has been presented. The control strategy to obtain the equidistance pulses has been implemented in the DSP processor with the help of “CODE COMPOSER STUDIO”. Inverse cosine scheme was used for triggering of the thyristor. Final testing of the software modules was done with the RL load at low voltage. Prototype of DC motor drive has been built and tested with current control loop using low voltage. The experimental results show close resemblance with simulation results.