A Proposal for a New Variable Leakage Flux Motor with Interpolar Gap and Permanent Magnets

抄録

Recently, interior permanent magnet motors (IPMs) or motors with field winding have been investigated from a viewpoint of magnetic field control. IPMs have an advantage of field weakening; however, their overall flux passing the stator core is not sufficiently suppressed. On the other hand, motors with field winding can control a wide range; however, they need the field windings and are the complicated shape and heavy. In this paper, a new structure of hybrid field motor without a field winding is proposed, whose rotor has regular salient poles arranged with interpolar gap and permanent magnet. In addition, this interpolar gap and permanent magnet motor (IGPM) is investigated along with its characteristics. By means of some basic equations related to flux, torque, and FEA, it is clarified that IGPM is more appropriate for field weakening control than IPM. In addition, we found that the proposed IGPM has yielded successful FEA and experimental results by preliminary prototype.