Title:
MOTOR
Document Type and Number:
Japanese Patent JP2019068523
Kind Code:
A
Abstract:
To provide a motor capable of restraining magnetic attraction of a rotor and a case facing in the axial direction by simple configuration.SOLUTION: A rotor 1 has a magnet 12 facing a stator 2 in the radial direction. The case 4 has a plate part 42 located farther axial one side than the rotor 1 in the radial direction and composed of a magnetic substance. The rotor 1 faces the plate part 42 on one side in the axial direction, and faces a substrate 3 on the other side in the axial direction. In a state where a force in the axial one side acting on the rotor 1 and a force in the axial the other side acting on the rotor 1 are balanced, the minimum first interval D1 in the axial direction between the magnet 12 and the plate part 42 is larger than the minimum second interval D2 in the axial direction between the magnet 12 and the substrate 3.SELECTED DRAWING: Figure 1
Inventors:
TAKAGI DAISUKE
Application Number:
JP2017189082A
Publication Date:
April 25, 2019
Filing Date:
September 28, 2017
Export Citation:
Assignee:
NIHON DENSAN KK
NIDEC SEIMITSU CORP
NIDEC SEIMITSU CORP
International Classes:
H02K21/14; H02K1/27; H02K5/00
Domestic Patent References:
| JP2012125088A | 2012-06-28 | |||
| JPH0956132A | 1997-02-25 |
Foreign References:
| WO2012169043A1 | 2012-12-13 |
Attorney, Agent or Firm:
Sano patent office