Title:
STATOR OF MOTOR
Document Type and Number:
WIPO Patent Application WO/1994/002982
Kind Code:
A1
Abstract:
A stator of a motor of this invention includes a ring-like yoke (2), tooth-shaped iron cores equidistantly disposed on the inner periphery of the yoke (2), slots (4) defined between adjacent tooth-shaped iron cores (3), stator coils (5) fitted into the slots (4), and bridge portions (31) connecting the inner peripheral side of the adjacent tooth-shaped cores (3). A rotor (6) is so disposed as to oppose the iron cores (3) through a gap, and the proportion of a length s of the bridge portion (31) in the circumferential direction to the tooth pitch p in the circumferential direction is within the range of 0.01 to 0.20. Accordingly, a cogging torque of the motor can be reduced without lowering EMF.
Inventors:
NINOMIYA YUJI (JP)
UEYAMA KENJI (JP)
UEYAMA KENJI (JP)
Application Number:
PCT/JP1993/001040
Publication Date:
February 03, 1994
Filing Date:
July 26, 1993
Export Citation:
Assignee:
YASKAWA DENKI SEISAKUSHO KK (JP)
NINOMIYA YUJI (JP)
UEYAMA KENJI (JP)
NINOMIYA YUJI (JP)
UEYAMA KENJI (JP)
International Classes:
H02K1/16; (IPC1-7): H02K1/16
Foreign References:
| JPS61108045U | 1986-07-09 | |||
| JPS5635665A | 1981-04-08 | |||
| JPS55145852U | 1980-10-20 |
Other References:
See also references of EP 0615330A4
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