Experimental Analysis of Three-Phase Induction Motors with Multiflux, Dual-Winding Configurations

In this paper, several multiflux, three-phase induction motors, dual-winding configurations are experimentally analysed. Using a motor with two reconfigurable stator windings sharing the same slots, several dual-winding configurations with different spatial displacement between the two partial windings, are experimentally tested. A programmable voltage source is used to adjust the line-to-line voltage at the terminals of the motor so that the fundamental flux level is the same for all the configurations. Then, the experimentally determined value is compared to the calculated value of the electromotive force and the per-unit values of line-to-line voltage per flux or current per flux are measured and compared to simulated results. Finally, the locked- rotor impedance was measured in order to assess its variation with the fundamental winding factor.