Title:
ONLINE PARAMETER IDENTIFICATION METHOD AND APPARATUS FOR THREE-PHASE ASYNCHRONOUS ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2018/028067
Kind Code:
A1
Abstract:
An online parameter identification method and apparatus for a three-phase asynchronous electric motor. The online parameter identification method for a three-phase asynchronous electric motor comprises the following steps: acquiring a stator voltage (S101), a stator current (S102) and a rotor rotation speed of a three-phase asynchronous electric motor, and obtaining, by means of calculation, a synchronous rotation speed according to the rotor rotation speed and a given slip ratio (S103); and according to the stator voltage, the stator current, the rotor rotation speed, the synchronous rotation speed, and a given stator inductance, rotor inductance and stator resistance, using a first calculation formula to calculate a rotor resistance (S104). The online parameter identification apparatus for a three-phase asynchronous electric motor comprises: a stator voltage acquisition module (1), a stator current acquisition module (2), a rotor rotation speed acquisition module (3), and a processing module comprising a synchronous rotation speed calculation unit (41) and a rotor resistance calculation unit (43). The provided online parameter identification method and apparatus for a three-phase asynchronous electric motor use a first calculation formula based on a quadratic equation with one unknown to calculate a rotor resistance, thereby having a small calculation amount, good convergence and high accuracy.
Inventors:
WANG XUEDI (CN)
CHE XIANGZHONG (CN)
YANG YANG (CN)
CHE XIANGZHONG (CN)
YANG YANG (CN)
Application Number:
PCT/CN2016/105624
Publication Date:
February 15, 2018
Filing Date:
November 14, 2016
Export Citation:
Assignee:
CRRC DALIAN R & D CO LTD (CN)
International Classes:
H02P21/16
Foreign References:
| CN102072779A | 2011-05-25 | |||
| CN103956957A | 2014-07-30 | |||
| CN103023421A | 2013-04-03 | |||
| CN105811833A | 2016-07-27 | |||
| CN101188398A | 2008-05-28 |
Attorney, Agent or Firm:
LEADER PATENT & TRADEMARK FIRM (CN)
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