Patent ID: 6975055
Filing Date: 2005-12-13
Classification: B61C,B61F,H02K,Y02T

Abstract:
1. A dynamo-electric machine comprising: a stator having a winding, and a rotor having first and second field magnets, which have different, magnetic poles and which are arranged sequentially and alternately on a rotating shaft in a rotation direction, the first and second field magnets being opposed to the magnetic poles of said stator, wherein said first and second field magnets displace in an axial or the rotation direction of the rotating shaft according to the magnetic action force of said first and second field magnets and the direction of the torque generated in said rotor, and wherein in response to a first rotational direction and in response to an opposite rotational direction of said rotor, one of said first and said second field magnets displace in an axial direction of said rotating shaft and in a rotational direction while another of said first and said second field magnets is fixed, under a condition where said another of said first and said second field magnets is held on said rotating shaft.