Title:
DEVICE AND SYSTEM FOR MEASURING ROTATION ANGLE, AND ROTATOR
Document Type and Number:
WIPO Patent Application WO/2018/192515
Kind Code:
A1
Abstract:
Disclosed are a device and system for measuring a rotation angle, and a rotator. The device for measuring a rotation angle comprises stator detection teeth, and at least one detection coil system consisting of multiple coils; the coils are wound around the stator detection teeth, and at most one coil is wound around each stator detection tooth; each detection coil system comprises at least four columns of multi-bridge arm bridge circuits connected in parallel and consisting of multiple coils; a lead is separately led out from contacts of upper and lower bridge arms of each column of bridge arms as a signal line; a first signal voltage is generated from differential signals of two of the signal lines, and a second signal voltage is generated from differential signals of the other two of the signal lines; the phase difference between the first signal voltage and the second signal voltage is a set angle, for measuring the rotation angle of a rotor. In an application having long signal lines, the influence of external interference during signal transmission can be greatly reduced by a differential method.
Inventors:
GAO XIANG (CN)
Application Number:
PCT/CN2018/083490
Publication Date:
October 25, 2018
Filing Date:
April 18, 2018
Export Citation:
Assignee:
SHANGHAI SHI YU ELECTRONIC TECH CO LTD (CN)
International Classes:
G01B7/30; G01D5/14; G01D5/245
Domestic Patent References:
| WO2008062778A1 | 2008-05-29 |
Foreign References:
| CN104165580A | 2014-11-26 | |||
| CN101929834A | 2010-12-29 | |||
| CN101939623A | 2011-01-05 | |||
| CN102346045A | 2012-02-08 | |||
| CN102072698A | 2011-05-25 | |||
| CN104165581A | 2014-11-26 |
Attorney, Agent or Firm:
SHANGHAI ZHI XIN PATENT AGENT LTD. (CN)
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