永久磁石埋込型モータの回転子及び圧縮機及び冷凍空調装置

Title:

永久磁石埋込型モータの回転子及び圧縮機及び冷凍空調装置

Document Type and Number:

Japanese Patent JP5414900

Kind Code:

B2

Abstract:

There is provided a rotor of a permanent magnet embedded motor that can reduce magnetic saturation due to slits arranged in outer circumferential iron core sections of permanent magnet insertion holes and reduce a torque ripple. A rotor of a permanent magnet embedded motor according to this invention includes: a rotor iron core formed by stacking a predetermined number of electromagnetic steel plates perforated in a predetermined shape; a plurality of permanent magnet insertion holes formed along an outer circumferential section of the rotor iron core; permanent magnet end gaps provided at both ends of the permanent magnet insertion hole; a permanent magnet inserted in the permanent magnet insertion hole; and a plurality of slits formed in an iron core section on the outer side of the permanent magnet insertion hole. The width in the radial direction of a slit thin section of each of the slits between the slit and the rotor iron core outer circumference gradually increases from an inter-electrode side toward a magnetic pole center and changes in a sine wave shape having a peak in the magnetic pole center.

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Inventors:

Koji Yabe
Fujisue Yoshikazu
Hayato Yoshino
Kazuhiko Baba
Tomoaki Oikawa

Application Number:

JP2012530493A

Publication Date:

February 12, 2014

Filing Date:

August 27, 2010

Export Citation:

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