Patent ID: 6700270
Filing Date: 2004-03-02
Classification: H02K

Abstract:
A synchronous induction motor comprising:a stator provided with a stator winding; a rotor rotating within said stator; a cage-type secondary electric conductor provided in a peripheral portion of a rotor yoke portion constituting said rotor; and a permanent magnet inserted into the rotor yoke portion and having a two-pole structure, wherein the magnetomotive force generated by one pole of said rotor is set to a value equal to or less than 10% of a peak value in a predetermined range at a non-continuous portion of a waveform of the magnetomotive force near an electrical angle of 0 degrees or 180 degrees, and wherein the magnetomotive forces generated by said rotor in a range of the electrical angle other than said range equal to or less than 10% are distributed in a sine wave shape.