Title:
METHOD OF STARTING SYNCHRONOUS MOTOR AND CONTROLLER THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/029787
Kind Code:
A1
Abstract:
A closed-loop method of starting a permanent magnet synchronous motor comprises driving the rotor by energizing stator windings using motor control signals based on an initial standstill rotor angle. Periodically estimating values of rotor flux linkage magnitude and/or angle based on back-electromotive force (emf) induced in the stator windings by the rotating rotor. The estimated values of rotor flux linkage magnitude are used to estimate respective new rotor angles which are used to generate updated motor control signals to drive the rotor. Control of the motor is switched-over to a closed-loop synchronous operation motor control algorithm in response to any one or any combination of the following conditions: at a predetermined period of time from initiation of the closed-loop start-up method; or upon determination that the rotor has reached a minimum operating speed; or upon determination that the estimated value of rotor flux linkage magnitude reaches or exceeds a threshold value.
Inventors:
LI KWEI CHUNG (CN)
Application Number:
PCT/CN2022/106531
Publication Date:
March 09, 2023
Filing Date:
July 19, 2022
Export Citation:
Assignee:
KINETIC TECH INTERNATIONAL HOLDINGS LP (CA)
GAIN SEMICONDUCTOR LTD (CN)
GAIN SEMICONDUCTOR LTD (CN)
International Classes:
H02P21/12
Foreign References:
| US10819264B1 | 2020-10-27 | |||
| CN105703682A | 2016-06-22 | |||
| CN109372787A | 2019-02-22 | |||
| CN101984554A | 2011-03-09 | |||
| US20090128074A1 | 2009-05-21 |
Attorney, Agent or Firm:
SHINY INTELLECTUAL PROPERTY FIRM (CN)
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