Patent ID: 7420312

Claim:
A rotating electrical machine comprising: an armature core on which an armature winding is wound; a rotor core which is supported by a rotation axis at a predetermined air gap in an inner diameter side of the armature core, and includes claw-shaped magnetic pole portions, in which adjacent magnetic poles have different polarities, and a cylindrical portion having a field winding; and a permanent magnet which is provided in a magnetic circuit of the rotor core and which, together with the field winding, supplies magnetic flux to the armature core, wherein the rotor core is provided with a magnetic short-circuiting mechanism for reducing the magnetic flux, supplied by the permanent magnet to the armature core, by creating a short-circuit, between the magnetic pole portions of the rotor core, by deforming a portion of the magnetic short-circuiting mechanism by a centrifugal force.