Title:
MOTOR, MOTOR DEVICE, AND POINTER TYPE DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2017022892
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To propose a high-torque low-noise motor, a motor device provided with the motor, and a pointer type display device.SOLUTION: A motor 1 comprises: a rotor 5 including magnets 50 in which S poles and N poles are alternately provided in a circumferential direction; a stator core 60 formed by arranging a plurality of salient poles 61 with tip portions facing each other at a distance on the outer peripheral surface of the magnet 50, in the circumferential direction; and a stator 6 provided with a coil 9 disposed around two of the salient poles 61 (salient poles 61b, 61f). When a magnetic pole width of the magnet 50 is D1 and a salient pole 61 width is D2, the salient pole width D1 is 50% or more of the magnetic pole width D2 of the magnet 50. In this manner, by optimizing the width of the salient pole 61, a high-torque low-noise motor can be obtained.SELECTED DRAWING: Figure 4
Inventors:
HOSHINA TETSUO
Application Number:
JP2015139287A
Publication Date:
January 26, 2017
Filing Date:
July 13, 2015
Export Citation:
Assignee:
NIDEC SANKYO CORP
International Classes:
H02K1/14; G01D13/22
Domestic Patent References:
| JP2002142432A | 2002-05-17 | |||
| JP2015097468A | 2015-05-21 | |||
| JP2014241685A | 2014-12-25 |
Attorney, Agent or Firm:
Shiro Yokozawa
Shin Kodaira
Toru Kawai
Kawaguchi Nobuko
Shin Kodaira
Toru Kawai
Kawaguchi Nobuko