Title:
INNER ROTOR TYPE BRUSHLESS MOTOR
Document Type and Number:
Japanese Patent JP2015211598
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a technology capable of detecting a position of a rotor part in a circumferential direction with high accuracy and correcting a dynamic balance of a rotor at both sides in an axial direction.SOLUTION: The rotor part includes an upper cylindrical part and a lower cylindrical part which are rotated together with the rotor. A stator part includes a circuit board including a rotation detection part. The lower cylindrical part includes a lower balance correction part and the dynamic balance of the rotor part is corrected by excavating the lower balance correction part. The upper cylindrical part includes an upper balance correction part and the dynamic balance of the rotor part is corrected by excavating the upper balance correction part. Thus, the dynamic balance of the rotor part can be corrected at both the sides in the axial direction of a rotor core. Further, in the upper cylindrical part, a detected part to be detected by the rotation detection part is arranged and the position of the rotor in the circumferential direction can be detected with high accuracy.
Inventors:
SAWADA TOMOYOSHI
OURA YUYA
OURA YUYA
Application Number:
JP2014093230A
Publication Date:
November 24, 2015
Filing Date:
April 28, 2014
Export Citation:
Assignee:
NIHON DENSAN KK
International Classes:
H02K7/04; H02K1/27; H02K29/08
Domestic Patent References:
| JP2010539884A | 2010-12-16 | |||
| JP2014039429A | 2014-02-27 | |||
| JP2008054465A | 2008-03-06 | |||
| JPH10257701A | 1998-09-25 | |||
| JPS6226172U | 1987-02-17 |