Title:
METHOD FOR ESTIMATING POSITION OF LINEAR TIME-VARIANT ROTOR OF LOW-SPEED PERMANENT MAGNET SYNCHRONOUS MOTOR
Document Type and Number:
WIPO Patent Application WO/2020/186656
Kind Code:
A1
Abstract:
A method for estimating the position of a linear time-variant rotor of a low-speed permanent magnet synchronous motor, comprising: first, injecting a high-frequency sinusoidal signal from a voltage end of a stator, thereby causing stator current output to contain rotor position information; then, passing the detected stator current signal through a first-order time- lag high-pass filter obtained from the difference between pure time lag and an average zero-order holder, and then passing the obtained signal through a class gradient descent time-variant low-pass filter, thereby obtaining a virtual output signal; finally, performing analytical operation on the virtual signal to obtain an estimated value for the rotor position. The described method has the advantages of being high-precision, being simple and effective, each filtering link being linear, having high calculation efficiency, and having downward compatibility.
Inventors:
ZHANG WEIDONG (CN)
YI BOWEN (CN)
ORTEGA ROMEO (CN)
VUKOSAVIC SLOBODAN∙N (CN)
STANKOVIC ALEKSANDAR (CN)
YI BOWEN (CN)
ORTEGA ROMEO (CN)
VUKOSAVIC SLOBODAN∙N (CN)
STANKOVIC ALEKSANDAR (CN)
Application Number:
PCT/CN2019/094791
Publication Date:
September 24, 2020
Filing Date:
July 05, 2019
Export Citation:
Assignee:
UNIV SHANGHAI JIAOTONG (CN)
International Classes:
H02P21/24; H02P21/18; H02P23/14; H02P25/022
Foreign References:
| CN109889118A | 2019-06-14 | |||
| CN109450304A | 2019-03-08 | |||
| CN105375847A | 2016-03-02 | |||
| CN107834929A | 2018-03-23 | |||
| JP2008220100A | 2008-09-18 | |||
| CN105027422A | 2015-11-04 |
Attorney, Agent or Firm:
SHANGHAI KESHENG INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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