Chaos in a fixed-frequency DC chopper-fed PMDC drive system is identified with variations of its parameters. The dynamical system is described by the state space representation in the continuous conduction mode. The system shows different chaotic behaviors at different values of switching frequency (f_s). The chaotic and non-chaotic region is separated by the boundary, which is obtained at error amplifier gain (g) against switching frequency (f_s) and a mathematical relationship is built. A special observation shows that the power wave fluctuations of the selected PMDC motor become less when the system is in chaotic zone. The study is helpful in selecting the range and combination of parameters to run the motor as per the requirement.
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