MAGNET EMBEDDED ROTOR, ELECTRIC MOTOR, AND ASSEMBLY METHOD OF ELECTRIC MOTOR
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United States of America Patent
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-
N/A
Issued Date -
May 31, 2012
app pub date -
Nov 23, 2011
filing date -
Nov 30, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
According to one embodiment, a magnet embedded rotor includes a rotor iron core and a permanent magnet. The rotor iron core is formed of a magnet into a cylindrical shape and provided with holes. The rotor iron core includes a nonmagnetic portion, salient poles, a notch groove, a bridge, and a first protrusion. The nonmagnetic portion prevents magnetic-flux short circuiting. The salient poles are located on the outer circumferential side of the holes. The notch groove is located between an adjacent pair of the salient poles. The bridge is located between the notch groove and the nonmagnetic portion. The first protrusion protrudes outward from the center of the notch groove. The permanent magnet is embedded in each hole. The radius of each salient pole gradually decreases from the center toward the notch groove. The radius of the first protrusion is equal to that of the center of the salient pole.
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