Patent ID: 6794790
Filing Date: 2004-09-21
Classification: H02K

Abstract:
A rotary electric machine comprising:an armature having an armature core and an armature winding mounted in said armature core; a rotor having a rotor core disposed opposite said armature core and a first magnetic-flux source for supplying first magnetic flux to said rotor core to supply an alternating magnetic field to said armature core when said rotor rotates, said rotor core having a first end polarized by said first magnetic-flux source to be one of magnetic poles and a second end polarized by said first magnetic-flux source to be the other magnetic pole; a frame for supporting said armature and said rotor; and a second magnetic flux source, fixed to said frame, for supplying second magnetic flux to said rotor core in a direction to supplement said first magnetic flux; wherein said second magnetic flux source comprises a yoke for magnetically connecting said armature core and said first end of said rotor core to supply supplemental magnetic flux to said armature core, and wherein said yoke has one end that faces said first end of said rotor through a gap and is polarized to have the same polarity as said first end of said rotor and the other end in contact with said armature core.