Patent ID: 6919663
Filing Date: 2005-07-19
Classification: H02K

Abstract:
1. A multi-phase internal rotor motor, comprising: a slotted stator; a rotor separated by an air gap from said stator, said rotor comprising a lamination stack with a plurality of salient poles defining between them interpolar gaps; said stack being formed with a plurality of pockets, each extending partway between two adjacent interpolar gaps of said rotor; at least one respective essentially parallel-magnetized permanent magnet partially filling each of said pockets and having respective ends facing adjacent ones of said interpolar gaps, said magnet ends, and sidewalls of unfilled portions of said pockets, together defining a region of increased magnetic resistance adjacent each of said magnet ends; a plurality of thin lands, formed of the rotor laminations, extending essentially in a peripheral direction and essentially parallel to said air gap, said lands having widened cross-sections (