Optimization of Single-Phase Induction Motor

Induction Motors are responsible for consumption of nearly 40% of electricity globally, as these are the driving force behind each fan, compressor, pump and nearly every mechanical load which have rotational motion. About 30 million new electric motors are put in use every year for industrial application alone. Despite the advent of permanent magnet-based motors, single phase induction motors (SPIM) out numbers all other types of induction motors, because of its simple and robust construction and low cost. Hence small improvement in the performance of SPIM may greatly impact energy consumption worldwide and reduce carbon footprint eventually, however, studies related to SPIM is neglected by the researchers as these are not covered under the minimum efficiency standards. This paper presents design optimization technique of SPIM with the objective functions of maximization of efficiency while ensuring minimum material and tooling cost implication. For the current work a 0.5 hp, 2 pole motor has been considered as a sample case. Design approaches for optimization of capacitor start and run motor with the help of the double revolving theory is presented. The optimized design is validated by Finite Element Analysis and the predicted result of FEA analysis is compared with test result and found to be in good agreement.