Patent ID: 7531934

Claim:
A method of manufacturing a self-start synchronous motor comprising the steps of: forming a stator having a stator core and windings wound on said stator core, and forming a rotor having an outer diameter slightly smaller than an inner diameter of said stator and arranged inside of said stator, said rotor being formed with a rotor core; embedding a plurality of conductor bars in an outer peripheral portion of said rotor core over an entire periphery thereof; providing end rings on opposite end sides of said conductor bars and forming a squirrel cage conductor in cooperation with said conductor bars; embedding a plurality of permanent magnets in said rotor core at positions inside of an inner peripheral surface of said conductor bars so that said permanent magnets are positioned closer to an axis of said rotor than a position of said inner peripheral surface of said conductor bars to said axis; and forming at least one frictional agitation joined between said conductor bars and said end rings so as to electrically and mechanically frictionally bond said conductor bars and said end rings together through said at least one frictional agitation joint; wherein said conductor bars are interposed between said end rings and a balance weight is attached to one of the end rings.