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Patent Searching and Data


Title:
BRUSHLESS MOTOR
Document Type and Number:
WIPO Patent Application WO/2000/060726
Kind Code:
A1
Abstract:
A 3-phase brushless motor which includes a rotor which has permanent magnets so as to provide P pieces of magnetic poles (wherein P is an integer not smaller than 2) and a stator which has a plurality of coils arranged into, for instance, an approximately triangular form or an approximately trapezoidal form, wherein an angular distance between adjacent coils is (360/P) x (5/3) degrees, and three position detection devices which detects the position of the rotor are arranged with angular intervals of (360/P) x (2/3) degrees in ranges where the coils are not placed, whereby the shapes and arrangement of the coils can be optimized and the reduction of the number of coils and the improvement of motor characteristics can be realized.

Inventors:
FUKUSHIMA SHINJI (JP)
Application Number:
PCT/JP2000/001925
Publication Date:
October 12, 2000
Filing Date:
March 29, 2000
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
FUKUSHIMA SHINJI (JP)
International Classes:
H02P6/08; H02K21/24; H02K29/08; H02P6/17; (IPC1-7): H02K29/00; H02K3/04; H02K21/24
Foreign References:
JPS4843109U1973-06-04
JPS58115887U1983-08-08
JPS56166759A1981-12-22
JPS6447252A1989-02-21
JPS57163185U1982-10-14
JPH01315244A1989-12-20
US5124604A1992-06-23
Attorney, Agent or Firm:
Iwahashi, Fumio (Matsushita Electric Industrial Co, Ltd. 1006 Oaza Kadoma Kadoma-shi, Osaka, 571-8501, JP)
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