Abstract

This paper describes a fuzzy logic based smart motor controller to improve the starting performance of induction motor, and establishes the fact that optimum firing angle of the smart motor controller depends on the motor parameters. Identically rated motors with different parameter values are considered for the work. Fuzzy logic controller adjusts the firing angle of the SMC to improve the starting performance. Extensive simulations are carried out and electrical characteristics like peak positive and negative torque pulsations, peak starting current, nature of voltage and current waveforms at steady state are analyzed to demonstrate this concept. Results show that the optimum firing angle depends largely on motor parameters.

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