Title:
ROTATION DETECTOR AND MOTOR EQUIPPED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2021/044758
Kind Code:
A1
Abstract:
This rotation detector is for detecting the rotation amount of a rotary shaft of a motor, and is provided with: a power generation magnet which is integrally mounted to the rotary shaft and which has four or more magnetic poles arranged in the outer circumferential direction; at least one power generation element comprising a magneto sensitive part and an induction coil; a first magnetic sensor; a second magnetic sensor; and a magnetic flux control member that moves together with the power generation magnet in accordance with rotation of the rotary shaft and that can generate an excitation voltage to the first magnetic sensor and/or the second magnetic sensor, wherein the first and second magnetic sensors are driven by electric power generated by the power generation element as a result of the rotation of the power generation magnet.
Inventors:
TANAKA MASAKI
Application Number:
PCT/JP2020/028210
Publication Date:
March 11, 2021
Filing Date:
July 21, 2020
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
G01D5/244; H02P6/16
Domestic Patent References:
| WO2006070826A1 | 2006-07-06 |
Foreign References:
| DE102009019719A1 | 2010-11-11 | |||
| JP2008014799A | 2008-01-24 | |||
| US20100213927A1 | 2010-08-26 | |||
| JP2018105894A | 2018-07-05 | |||
| JP2016005918A | 2016-01-14 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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