Title:
MOTOR DRIVE SYSTEM, AND METHOD AND DEVICE FOR SYNCHRONOUS CALCULATION OF SAMPLED PHASE CURRENT AND PHASE VOLTAGE
Document Type and Number:
WIPO Patent Application WO/2019/095877
Kind Code:
A1
Abstract:
Disclosed in the present application are a motor drive system, and a method and device for synchronous calculation of sampled phase current and phase voltage. The method comprises the following steps: sampling three-phase current of a motor to obtain a current sampling value, and obtaining an instruction voltage or a sample voltage as a voltage sampling value; and performing synchronous conversion on the current sampling value and the voltage sampling value to obtain a fundamental wave voltage at a current sampling time to allow a current vector and a voltage vector input into a flux observer to keep synchronous. The present method can ensure the accuracy of the output angle of the flux observer, thereby ensuring the normal operation of the motor.
Inventors:
LIU YI (CN)
SUN JIE (CN)
SUN JIE (CN)
Application Number:
PCT/CN2018/108562
Publication Date:
May 23, 2019
Filing Date:
September 29, 2018
Export Citation:
Assignee:
MIDEA GROUP CO LTD (CN)
International Classes:
H02P21/13; H02P21/14
Foreign References:
| CN107994827A | 2018-05-04 | |||
| CN103944482A | 2014-07-23 | |||
| CN105122627A | 2015-12-02 | |||
| CN107294454A | 2017-10-24 |
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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