Title:
METHOD AND SYSTEM FOR CONTROLLING ELECTRIC MOTOR , AND CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2020/103894
Kind Code:
A1
Abstract:
Provided are a method and system for controlling an electric motor, and a controller. The method comprises: controlling an electric motor to operate in an open-loop manner; determining whether a rotational speed of the electric motor reaches a preset rotational speed; if so, determining whether the absolute value of an angle difference between an open-loop angle and a calculated position angle of the electric motor is greater than a preset angle; and if the absolute value of the angle difference is less than or equal to the preset angle, controlling the electric motor to operate in a closed-loop manner so as to avoid the situation where the electric motor cannot operate stably due to problems such as electric motor speed vibration caused by too large an angle difference between the open-loop angle and the position angle.
More Like This:
| JPH04208088 | METHOD AND CIRCUIT FOR STARTING SENSORLESS MOTOR |
| JPH0632800 | [Name of invention] Electric motor starter |
| JPH02250692 | MOTOR CONTROLLER |
Inventors:
JIANG DEKAI (CN)
Application Number:
PCT/CN2019/119890
Publication Date:
May 28, 2020
Filing Date:
November 21, 2019
Export Citation:
Assignee:
HANGZHOU LEADERWAY ELECTRONICS CO LTD (CN)
International Classes:
H02P6/21
Foreign References:
| CN106788066A | 2017-05-31 | |||
| CN104253572A | 2014-12-31 | |||
| CN101984554A | 2011-03-09 | |||
| CN105207558A | 2015-12-30 | |||
| US20160056740A1 | 2016-02-25 | |||
| CN201811397469A | 2018-11-22 |
Other References:
YIN, LI-JIE; ZHANG, YI-BING: "A Fast and Smooth Startup Method of Position Sensorless PMSM", SMALL & SPECIAL ELECTRICAL MACHINES, vol. 46, no. 7, 28 July 2018 (2018-07-28), pages 40 - 43, XP009529652, ISSN: 1004-7018
See also references of EP 3886312A4
See also references of EP 3886312A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
Download PDF: