Investigation on the Dynamic Performances of a Doubly Salient Flux Memory Motor under On-Line Flux Regulation for Electric Vehicles

By incorporating the magnetization level of AINiCo permanent magnets (AINiCo-PMs) into doubly salient permanent magnet (DSPM) motor, a new doubly salient flux memory (DSFM) motor is proposed. The magnetization level of permanent magnets (PMs) in the motor can be easily regulated by a temporary dc current pulse and then be memorized automatically. So the resulting new memory motor can not only retain high power density, but also offer efficient air-gap flux control. The purpose of this paper is to build a simulation model of speed control system in DSFM motor, where dynamic performances are investigated in details at different magnetic flux levels. The simulation results shows that the DSFM motor has the advantages of the wide speed range at high speed operation and high torque density at low speed operation, which makes it suitable for the application in electric vehicles (EVs).