Title:
DRAIN VALVE DRIVING DEVICE
Document Type and Number:
Japanese Patent JP2015195637
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a drain valve driving device capable of preventing an axial position of an inductor from being deviated even in the case where an error is generated in a magnetic center of a member forming an induction motor mechanism, and capable of preventing the lifetime of the device from being reduced by eccentric wearing of a bearing part of the inductor as a result by suppressing vibrations during rotation of the inductor.SOLUTION: In a motor where an induction rotating body is placed, a permanent magnet is fixed in a circumferential direction on an inner peripheral surface of a rotor shank, and a cylindrical induction ring part formed from a non-magnetic conductor is provided at an inner peripheral side of the permanent magnet. A magnetic center in an axial direction of the induction rotating body is placed closer to an opening of a rotor than a magnetic center in an axial direction of the permanent magnet.
Inventors:
MIYAMOTO KIYOTAKA
Application Number:
JP2014071056A
Publication Date:
November 05, 2015
Filing Date:
March 31, 2014
Export Citation:
Assignee:
NIDEC SANKYO CORP
International Classes:
H02K1/27
Domestic Patent References:
| JP2002153016A | 2002-05-24 | |||
| JP2002186219A | 2002-06-28 | |||
| JP2000166171A | 2000-06-16 |
Foreign References:
| US20130193794A1 | 2013-08-01 |
Attorney, Agent or Firm:
Noboru Ueno