Reduction of torque ripple in DC motor drive based on cascading three H-bridge chopper topology

In this paper, a new approach of using tri-cascaded H-bridge chopper topology fed dc motor drive is depicted. Main Objective of employing this technique is to reduce torque ripples for all ranges of speeds at a particular switching frequency using pulse width modulation technique. Conventional method of using H-bridge and the proposed technique are analyzed logically and the results of torque variations are presented. Matlab/Simulink is used for the numerical interpretation of the proposed topology and its results are in wide agreement with the analytical predictions.