Title:
POSITIONING METHOD FOR SWITCHED RELUCTANCE MOTOR ROTOR HAVING NUMBER OF PULSES THAT ADJUSTS WITH SPEED
Document Type and Number:
WIPO Patent Application WO/2022/253130
Kind Code:
A1
Abstract:
A method for estimating the position of a rotor of a switched reluctance motor for a full range of speeds. A magnetic flux relational formula within a winding and an instantaneous voltage of the switched reluctance motor are defined, and the rotational speed of the motor is divided into low speed, moderate speed, and high speed; in a low speed operating state, sector triggering is selected according to a comparison of a current response value and a current threshold, so as to determine the position of a rotor of the motor; in the moderate speed operating state, lookup and determination are performed on the position of the rotor of the motor via a preset data table according to the change in the number of pulses injected as the rotational speed of the motor changes; in the high speed operating state, considering that the number of pulses that can be injected is small, a capacitor charge loop is designed, enabling a response current formed by an injected pulse voltage to charge a capacitor, a capacitor side voltage is measured, and then lookup is performed on a voltage-rotor position preset data table according to a point capacitor voltage value, and the position of the rotor is determined. The present invention can implement full range position estimation for a rotor of a motor, and the problem of traditional injection of a fixed number of pulses causing practical engineering problems as well as the problem of an inaccurate positional angle of the rotor of the motor are solved.
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Inventors:
CAI HUI (CN)
Application Number:
PCT/CN2022/095554
Publication Date:
December 08, 2022
Filing Date:
May 27, 2022
Export Citation:
Assignee:
UNIV CHANGSHA SCI & TECH (CN)
International Classes:
H02P25/089
Foreign References:
| CN107979311A | 2018-05-01 | |||
| CN101436843A | 2009-05-20 | |||
| US20060125427A1 | 2006-06-15 |
Other References:
DONG DANDAN, XU BO; WU CHENGLI: "Sensorless Control Research Over Entire Speed Range of SRM", MICROMOTORS, vol. 49, no. 1, 31 January 2016 (2016-01-31), pages 69 - 74, XP093009941, ISSN: 1001-6848, DOI: 10.15934/j.cnki.micromotors.2016.01.016
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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