Title:
INNER ROTOR MOTOR
Document Type and Number:
WIPO Patent Application WO/2014/069288
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide an inner rotor motor with a stator adopting a square stator core, capable of increasing the torque thereof without increasing the size of the motor. The inner rotor motor comprises: a stator having a stator core projecting a plurality of main poles on the inner side of an annular core back and a coil wound around each of the main poles via an insulating body; and a rotor rotatably arranged inside the stator so as to face the tip end of each main pole, the rotor having a rotary shaft in the axial center. The inner rotor motor is characterized in that: the core back part of the stator core is configured to form a substantially square outer shape by cutting off the four corners with the lateral faces of the four sides of the square respectively forming the outer surface of the motor; each main pole of the stator core is arranged at a position forming a prescribed angle with the center of the four sides of the core back part circumferentially with the axial center as the center; and the ratio of the maximum inner diameter to the minimum outer diameter in the stator core is set to 0.65 to 0.75.
Inventors:
FUKASAWA SHIN (JP)
NGUYEN THANH TRUNG (JP)
KATO TAKAYA (JP)
ARAKAWA MIHO (JP)
NAKAGAWA TSUYOSHI (JP)
NGUYEN THANH TRUNG (JP)
KATO TAKAYA (JP)
ARAKAWA MIHO (JP)
NAKAGAWA TSUYOSHI (JP)
Application Number:
PCT/JP2013/078617
Publication Date:
May 08, 2014
Filing Date:
October 22, 2013
Export Citation:
Assignee:
NIDEC SERVO CORP (JP)
International Classes:
H02K37/14; H02K1/14
Foreign References:
| JP2012005311A | 2012-01-05 | |||
| JP2007124848A | 2007-05-17 | |||
| JP2002503078A | 2002-01-29 | |||
| JP2010104220A | 2010-05-06 | |||
| JP2010246323A | 2010-10-28 |
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