Title:
ELECTRIC MOTOR POSITIONING DEVICE, ELECTRIC MOTOR, AND TRIPOD HEAD
Document Type and Number:
WIPO Patent Application WO/2020/000476
Kind Code:
A1
Abstract:
An electric motor positioning device is applied in an electric motor comprising a rotor and a stator. The rotor is rotatably installed at the stator. The electric motor positioning device comprises a photoelectric sensor and a positioning ring. One of the photoelectric sensor and the positioning ring is fixed to and rotatable with the rotor while the other is fixed to the stator. The positioning ring comprises a first region and a second region. Relative positions of the photoelectric sensor and the positioning ring change within a preset range with rotation of the rotor relative to the stator. The preset range comprises a boundary between the first region and the second region. The invention enables an initial position of an electric motor to be determined easily and quickly.
Inventors:
LIU SICONG (CN)
YAN JIABIN (CN)
CHEN ZIHAN (CN)
ZHAO XIFENG (CN)
YAN JIABIN (CN)
CHEN ZIHAN (CN)
ZHAO XIFENG (CN)
Application Number:
PCT/CN2018/093887
Publication Date:
January 02, 2020
Filing Date:
June 30, 2018
Export Citation:
Assignee:
SZ DJI TECHNOLOGY CO LTD (CN)
International Classes:
H02K29/10
Foreign References:
| CN106374715A | 2017-02-01 | |||
| JPH0429551A | 1992-01-31 | |||
| CN201439856U | 2010-04-21 | |||
| CN206402077U | 2017-08-11 | |||
| JP2004064891A | 2004-02-26 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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