Novel two-phase inverter-fed induction-motor drive

A novel two-phase inverter-fed induction-motor drive for essentially constant-speed operation is described, and an example of a 30 W drive is used to demonstrate its performance characteristics and to provide experimental results. The performances of the 30 W motor with two-phase sine wave and inverter supplies are compared, and the speed variation of the inverter drive caused by a supply voltage change is shown to be less than that for a comparable DC motor. A method of predicting the drive performance is presented and is validated by comparisons of theoretical results and test measurements.