Novel Multiflux, Three-Phase, Dual-Winding Configurations

In this paper, several novel multiflux, three-phase, dual-winding configurations are presented, mathematically analysed, and simulated. In relation to the previously proposed multiflux configurations, those being now proposed provide a larger number of flux levels (more than 10), depending on the spatial displacement angle between the two partial windings of each phase, as well as on the ratio of the respective number of turns. If the connection modes for a given winding configuration were properly selected, the flux variation steps between different connection modes can be more balanced, leading to a better distribution of the efficiency curves over the entire motor load range. These novel dual-winding configurations can be applied, for example, in line-operated induction motors to adjust the magnetizing flux as a function of the actual load level, improving the respective efficiency and power factor at partial load.