Title:
ROTATION DETECTOR, AND MOTOR COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2020/255682
Kind Code:
A1
Abstract:
A rotation detector that detects the amount of rotation of a rotating shaft in a motor, the rotation detector comprising: a magnetism-detecting element configured from a magnetic body and an inductive coil; a magnetism-shielding plate attached to the rotating shaft so as to rotate integrally, the magnetism-shielding plate having a magnetic-flux-transmitting part; and a magnet having a plurality of magnetic poles with mutually different polarities, the magnet being such that the relative position thereof with respect to the magnetism-detecting element does not change. The magnetic body exhibits a high Barkhausen effect when a magnetic field of a prescribed amount or higher is applied. When viewed from a prescribed direction, the magnetism-detecting element, the magnetism-shielding plate, and the magnet are arranged in the stated order with gaps formed between each of the magnetism-detecting element, the magnetism-shielding plate, and the magnet.
Inventors:
AGEHARA AKIO
KIJIMA KOTA
KIJIMA KOTA
Application Number:
PCT/JP2020/021554
Publication Date:
December 24, 2020
Filing Date:
June 01, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01D5/244; G01D5/245; H02K11/215
Foreign References:
| JPS5767821A | 1982-04-24 | |||
| JPS56132018A | 1981-10-16 | |||
| JP2008014799A | 2008-01-24 | |||
| JPH04122378U | 1992-11-02 | |||
| DE102009019719A1 | 2010-11-11 | |||
| US4217512A | 1980-08-12 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
Download PDF:
Previous Patent: QUICK CONNECTOR
Next Patent: SEMICONDUCTOR LASER LIGHT SOURCE MODULE AND SEMICONDUCTOR LASER LIGHT DEVICE
Next Patent: SEMICONDUCTOR LASER LIGHT SOURCE MODULE AND SEMICONDUCTOR LASER LIGHT DEVICE