Evaluation of low-cost topologies for two phase induction motor drives, in industrial applications

This paper investigates and compares the potential of the two-phase induction motors to accommodate variable speed operation in AC drives. The analysis is based on both theory and experimental work, showing a conflict between the performances on one side, and the cost/complexity for such AC drives on the other. Another contradiction comes from the benefits as well as from the drawbacks related with the AC running capacitor. It is concluded that the two-phase induction motor drives are more dependent upon the load characteristic than three-phase motor drives, while the best topology is a compromise between practical factors.