Title:
FUNCTION-SWITCHING-BASED POSITION-SENSORLESS CONTROL METHOD AND SYSTEM FOR DIRECT-CURRENT MAGNETISM-REGULATING MEMORY MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/215588
Kind Code:
A1
Abstract:
Disclosed is a function-switching-based position-sensorless control method and system for a direct-current magnetism-regulating memory machine. The method comprises: step I: during normal operation of a direct-current magnetism-regulating memory machine, collecting an induced voltage uf of a magnetism-regulating winding, and extracting an induced electromotive force ef of the magnetism-regulating winding by means of an electromotive force observer; step II: calculating and obtaining, according to the induced electromotive force ef of the magnetism-regulating winding, an electrical angle observed value (a) and an electrical angular velocity observed value (b) by means of a position/velocity observer, and carrying out vector control on the direct-current magnetism-regulating memory machine according to the electrical angle observed value (a) and the electrical angular velocity observed value (b) so as to realize a position observation function of the magnetism-regulating winding; and step III: when a permanent magnet magnetization state of the direct-current magnetism-regulating memory machine needs to be adjusted, generating, according to the electrical angular velocity observed value (b), a drive signal by means of a magnetization state controller to drive the magnetism-regulating winding to generate a magnetism-regulating magnetomotive force, so as to adjust the permanent magnet magnetization state, thereby realizing a magnetism-regulating function of the magnetism-regulating winding. By means of the solution, the usage efficiency of a magnetism-regulating winding can be improved.
Inventors:
YANG HUI (CN)
LI GUANGXU (CN)
LIN HEYUN (CN)
LV SHUKANG (CN)
LI GUANGXU (CN)
LIN HEYUN (CN)
LV SHUKANG (CN)
Application Number:
PCT/CN2019/105176
Publication Date:
October 29, 2020
Filing Date:
September 10, 2019
Export Citation:
Assignee:
UNIV SOUTHEAST (CN)
International Classes:
H02P21/13; H02P21/14; H02P21/24
Foreign References:
| CN110098772A | 2019-08-06 | |||
| CN108900131A | 2018-11-27 | |||
| CN107154765A | 2017-09-12 | |||
| CN108288933A | 2018-07-17 | |||
| JP5787583B2 | 2015-09-30 | |||
| JP5787584B2 | 2015-09-30 |
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK AGENCY (ORDINARY PARTNERSHIP) (CN)
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