Design of Controller for Chopper Fed DC Drive with Pulsating Load and Elastic Coupling under Resonance

Abstract

The performance of an electric drive not only depends on its electrical parts, but is significantly affected by its mechanical features. These mechanical features include elasticity of shaft, misalignment, backlash etc. These mechanical factors may cause resonance in the system and the armature current and torque may rise to very high magnitude. This resonance condition may cause damage to the entire drive system. The development of high performance d. c. drive system requires a more precise analysis of resonance condition of such system. This paper is mainly focused to analyze the performance of drive under normal running and resonance condition for the dc drive system, to design a suitable controller to protect the system under resonance condition and analyze the performance of drive with suitable controller designed.