ROTOR FOR PERMANENT MAGNET TYPE MOTOR, METHOD OF MANUFACTURING ROTOR FOR PERMANENT MAGNET TYPE MOTOR, AND PERMANENT MAGNET TYPE MOTOR
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United States of America Patent
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Issued Date -
Jul 31, 2014
app pub date -
Jan 29, 2014
filing date -
Jan 31, 2013
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Abstract
A rotor for a permanent magnet type motor has rotor core blocks in a multistage in an axial direction in which permanent magnets of a plurality of magnetic poles are incorporated, and has a stage skew structure in which the rotor core blocks of each stage are integrally formed so as to be shifted from each other in a rotational direction. The rotor core blocks of each stage have a flux barrier portion for blocking a short circuit magnetic flux between the magnetic poles, between the magnetic poles of the permanent magnet. A skew angle is set so that the flux barrier portions of the magnetic poles between the adjacent stages at least partially overlap each other in the rotor core blocks of different stages.
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