Title:
Electric motor rotor and its manufacturing method
Document Type and Number:
Japanese Patent JP6298086
Kind Code:
B2
Abstract:
Provided is a motor rotor comprising a rotor core having a plurality of punched holes, a plurality of magnets placed on an outer circumferential surface of the rotor core or placed inside the rotor core, and a resin for fixing the plurality of magnets to the rotor core, wherein in plan view, each of the punched holes has at least one first inner surface section which coincides with an arc of a perfect circle and at least one second inner surface section which does not coincide with any arc of the perfect circle and, in plan view, the second inner surface section extends from one end point of an arc subtending a central angle smaller than 180° in the perfect circle to the other end point of the arc by passing outside the perfect circle.
Inventors:
Nishifukumoto Akira
Application Number:
JP2016033417A
Publication Date:
March 20, 2018
Filing Date:
February 24, 2016
Export Citation:
Assignee:
FANUC Corporation
International Classes:
H02K1/27; H02K1/22; H02K15/02
Domestic Patent References:
| JP201414271A | ||||
| JP2009100634A | ||||
| JP200822601A | ||||
| JP2007104888A | ||||
| JP2005210795A |
Foreign References:
| US20150303752 |
Attorney, Agent or Firm:
Atsushi Aoki
Tetsuro Shimada
Shinji Mitsuhashi
Hirose Shigeki
Tatsuki Sone
Masahiro Tahara
Tetsuro Shimada
Shinji Mitsuhashi
Hirose Shigeki
Tatsuki Sone
Masahiro Tahara