Patent ID: 7023121

Claim:
A brushless rotary electric machine comprising; a stationary housing; a stator disposed in said stationary housing and having a pair of armature cores disposed tandem; a rotor having a pair of rotary cores disposed tandem, each said rotary core having a pole surface facing one of said armature core through an air gap, a center core portion and an annular space around said center core portion; an annular field coil disposed in a space formed by said annular space of said pair of rotary cores; and a support member extending from said housing through a space between said pair of armature cores into said annular space to suspend said field coil; wherein a plurality of permanent magnets disposed on said pole surface of each said rotary core at equal intervals in the circumferential direction thereof so that each of said permanent magnets on one of said rotary cores is disposed at an angular position between two of said permanent magnets on the other rotary core.