Dynamic braking of induction motor - Analysis of conventional methods and an efficient multistage braking model

In this paper, a detailed analysis is made on capacitor self excitation and DC injection methods of dynamic braking of induction motor through MATLAB/SIMULINK simulations. The effectiveness of these conventional dynamic braking methods is carefully analyzed while changing various parameters. The speed range and time duration for which these methods are the most effective is carefully observed during changing load conditions. The effects of changing capacitor values and DC injection voltage levels on the effective speed range have been studied and the time durations in which these methods are most effective are also analyzed. Using the analysis data obtained, the parameters of a reliable fast multistage dynamic braking model are arrived upon for its best possible performance. The performance of this model, which efficiently dissipates the kinetic energy of the motor in a very short duration of time, is checked through simulations.