Title:
ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2023/106006
Kind Code:
A1
Abstract:
The present invention detects a discharge phenomenon of a bearing with high accuracy. This electric motor (10) comprises: a stator (11) having a stator core (11a) on which a winding (11b) is wound; a rotor (12) having a shaft (14) and a rotary body (13) provided to face the stator (11); first and second bearings (15a, 15b) which are a pair of bearings; first and second brackets (19a, 19b) which are a pair of brackets and respectively fix outer rings (17) of the pair of bearings; a conductor (21); and a current detector (22). Each of the pair of bearings has an inner ring (16) and an outer ring (17), and supports the shaft (14) on the inner ring (16). The conductor (21) electrically connects the outer ring (17) of the first bearing (15A) and the outer ring (17) of the second bearing (15B) or the stator core (11a). The current detector (22) detects a discharge current flowing through the conductor (21) accompanying a discharge in the first bearing (15A) or the second bearing (15B).
Inventors:
YOKOUCHI YASUYUKI
WATANABE AKIHIKO
WATANABE AKIHIKO
Application Number:
PCT/JP2022/041033
Publication Date:
June 15, 2023
Filing Date:
November 02, 2022
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02K5/16; H02K5/08; H02K11/27
Foreign References:
| JP2013066253A | 2013-04-11 | |||
| JP2016146691A | 2016-08-12 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
Download PDF: