Title:
MOTOR AND ENCLOSED ELECTRIC COMPRESSOR
Document Type and Number:
Japanese Patent JP2006025564
Kind Code:
A
Abstract:
To provide an enclosed electric compressor, wherein the vibration of a stator due to torque fluctuation in a brushless motor for enclosed electric compressors is suppressed and noise is reduced.
A rotor constitutes a concentrated winding brushless motor for use in an enclosed electric compressor. The radius of curvature of the curved surface of the rotor is made larger than the reference radius. The air gap on the curved surface is varied to reduce rapid change in magnetic flux. Thus, the range of fluctuations in torque (torque ripples) produced due to change in magnetic flux is narrowed. As a result, vibration in the stator due to torque ripples is reduced, and a low-noise enclosed electric compressor is obtained.
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Inventors:
FUNAMI JUN
Application Number:
JP2004202858A
Publication Date:
January 26, 2006
Filing Date:
July 09, 2004
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H02K29/00; F04B39/00; H02K1/27
Attorney, Agent or Firm:
Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito
Tomoyasu Sakaguchi
Hiroki Naito