Flux Intensifying PM-Motor with Variable Leakage Magnetic Flux Technique

This paper describes a flux intensifying PM-motor with variable magnetic flux. The unique feature of this proposed motor is the ability to passively adjust the magnetic flux linkage into the armature windings in proportion to the armature magnetomotive force and/or armature current phase. The magnetic circuit topology of the flux intensifying PM-motor and the passive variable leakage magnetic flux are determined through FE-analysis. Then, the driving performance is experimentally elucidated through comparison with that of a reverse pole type (flux weakening) PM-motor without variable leakage magnetic flux.