Title:
ELECTRIC MOTOR, PAN-TILT, CAMERA ASSEMBLY AND UNMANNED AERIAL VEHICLE
Document Type and Number:
WIPO Patent Application WO/2020/000854
Kind Code:
A1
Abstract:
Disclosed are an electric motor, a pan-tilt, a camera assembly and an unmanned aerial vehicle. The electric motor comprises a stator (61); a rotor (62) which is sleeved on the stator (61) and can rotate about the rotation axis of the rotor (62) relative to the stator (61); and a first linear Hall element (63) and a second linear Hall element (64), which are both fixedly mounted to the stator (61), wherein the plane where the first linear Hall element (63) and the second linear Hall element (64) are located is perpendicular to the rotation axis, and in the plane, the mechanical angle α between the first linear Hall element (63) and a magnetomotive force axis (Fa) of a first phase winding of the stator (61) satisfies -30° ≤ 360° - α×p - 90° ≤ 30°, and the mechanical angle β between the second linear Hall element (64) and a magnetomotive force axis (Fb) of a second phase winding of the stator (61) satisfies -30° ≤ 360° - β×p - 90° ≤ 30°, where p is the number of pole pairs of the rotor. As a result, the angle of the electric motor can be precisely estimated merely by means of two linear Hall elements, reducing the cost and facilitating the realization of a miniaturized design.
More Like This:
| JP2007300725 | STATOR, BRUSHLESS MOTOR, AND WINDING METHOD |
| JP2854519 | [Title of Invention] Brushless Motor |
| JP2005168264 | BRUSHLESS MOTOR |
Inventors:
LUO DONGDONG (CN)
Application Number:
PCT/CN2018/114323
Publication Date:
January 02, 2020
Filing Date:
November 07, 2018
Export Citation:
Assignee:
AUTEL ROBOTICS CO LTD (CN)
International Classes:
H02K29/08
Foreign References:
| CN107070102A | 2017-08-18 | |||
| CN203377747U | 2014-01-01 | |||
| CN107690745A | 2018-02-13 | |||
| CN108199539A | 2018-06-22 | |||
| US6020665A | 2000-02-01 |
Attorney, Agent or Firm:
AFD CHINA INTELLECTUAL PROPERTY LAW OFFICE (CN)
Download PDF:
Previous Patent: SELF-DRIVEN TRAVELING ROBOT AND CONTROL METHOD THEREFOR
Next Patent: MOTOR, POWER DEVICE, AND UNMANNED AERIAL VEHICLE
Next Patent: MOTOR, POWER DEVICE, AND UNMANNED AERIAL VEHICLE