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Patent Searching and Data


Title:
ELECTRIC MOTOR, ESPECIALLY AN ELECTRONICALLY COMMUTED D.C. MOTOR
Document Type and Number:
WIPO Patent Application WO2003030332
Kind Code:
A3
Abstract:
The invention relates to an electric motor, especially an electronically commuted d.c. motor, comprising a stator and a rotor. The stator and the rotor are coaxially arranged in relation to a longitudinal axis of the electric motor. Said stator comprises a plurality of electrical stator poles and a plurality of phase windings. Said rotor comprises a permanent magnet having at least one pair of magnet poles which is associated with the phase windings. The phase windings and/or the permanent magnet are divided into a plurality of axial sections in the direction of the longitudinal axis of the electric motor, said sections being staggered in relation to each other about the longitudinal axis of the electric motor. The relative position of the individual phases is eliminated by the inventive motor, in such a way that the torque ripple can be reduced and torque gaps can be avoided.

Inventors:
HANS HELMUT (DE)
Application Number:
PCT/EP2002/009359
Publication Date:
November 13, 2003
Filing Date:
August 21, 2002
Export Citation:
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Assignee:
MINEBEA CO LTD (JP)
HANS HELMUT (DE)
International Classes:
H02K16/02; H02K1/27; H02K16/00; H02K21/16; H02K29/03; (IPC1-7): H02K29/03; H02K16/00; H02K21/16
Foreign References:
US6042349A2000-03-28
EP1087502A22001-03-28
Other References:
PATENT ABSTRACTS OF JAPAN vol. 014, no. 584 (E - 1018) 27 December 1990 (1990-12-27)
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