Permanent magnet dynamo-electric machine

A permanent magnet dynamo-electric machine comprising:

• a cylindrical yoke;
• a rear bracket;
• a plurality of auxiliary poles secured to the inner circumferential surface of said yoke at a uniform angular pitch in the circumferential direction of said yoke;
• a plurality of permanent magnets, each (1) being mounted between respective adjacent ones of said plurality of auxiliary poles, (2) being in contact with one of said respective adjacent auxiliary poles,(3) being spaced from another of said respective adjacent auxiliary poles to define a space therebetween, (4) being on the inner circumferential surface of said yoke at a uniform angular pitch in the circumferential direction of said yoke, and (5) having an axial end face;
• a rotor rotatably mounted in an inner circumferential portion of said plurality of permanent magnets;
• and
• a resin elastic catching member for elastically engaging with each of said plurality of permanent magnets at said end face and said space therebetween, said resin elastic catching member having (1) a ring-like portion with which said axial end faces make contact and (2) protruding pieces that axially project from said ring-like portion, said protruding pieces being forcedly inserted into each said space therebetween and exerting a circumferential compressive force on said plurality of permanent magnets, said circumferential compressive force restricting said plurality of permanent magnets from circumferential movement;
• wherein said rear bracket compresses said resin elastic catching member, and causes said resin elastic catching member to exert an axial compressive force on said plurality of permanent magnets, said axial compressive force restricting said plurality of permanent magnets from axial movement.