Title:
BRUSHLESS DC MOTOR, BRUSHLESS DC MOTOR DRIVE SYSTEM, AND HYDRAULIC PUMP SYSTEM
Document Type and Number:
WIPO Patent Application WO/2008/029624
Kind Code:
A1
Abstract:
It is possible to reduce a basic wave component of cogging torque by controlling
drive of a brushless DC motor (311). A secondary frequency component of the cogging
torque is reduced by improving the structure of the brushless DC motor, especially
the structure of the rotor. This reduces the pressure pulsation in a hydraulic
pump system.
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Inventors:
NISHIJIMA, Kiyotaka (DAIKIN INDUSTRIES LTD., 1000-2,Aza Ootani, Okamoto-cho, Kusatsu-sh, Shiga 26, 5258526, JP)
Application Number:
JP2007/066274
Publication Date:
March 13, 2008
Filing Date:
August 22, 2007
Export Citation:
Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-Nishi 2-chome, Kita-ku, Osaka-sh, Osaka 23, 5308323, JP)
ダイキン工業株式会社 (〒23 大阪府大阪市北区中崎西２丁目４番１２号梅田センタービル Osaka, 5308323, JP)
ダイキン工業株式会社 (〒23 大阪府大阪市北区中崎西２丁目４番１２号梅田センタービル Osaka, 5308323, JP)
International Classes:
H02K1/27; H02K29/06; H02P6/10; H02K1/27; H02K29/06; H02P6/08
Attorney, Agent or Firm:
YOSHITAKE, Hidetoshi et al. (10th floor, Sumitomo-seimei OBP Plaza Bldg.4-70, Shiromi 1-chome, Chuo-k, Osaka-shi Osaka 01, 5400001, JP)
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