A method and system for identifying zero position of a long stator linear motor

Given the excitation current and torque current, combined with the tensile gauge measurement, the phase angle is adjusted to determine the zero position of the long stator linear motor rotor, which solves the problem of low zero position recognition accuracy in traditional methods and improves the control accuracy.

CN119766033APending Publication Date: 2025-04-04SUZHOU WATECH ELECTRONICS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411733468.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-29
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The traditional long stator linear motor zero-position identification method has the problem of low zero-position identification accuracy, especially when the motor is damped large, resulting in a decrease in control accuracy.

Method used

Given the excitation current and torque current, the tension gauge is used to measure the tension on the cable, and the phase angle is adjusted to determine the zero position. The specific steps include recording the tensile gauge readings under the excitation current and torque current and their corresponding angles until the maximum tensile force occurs to determine the zero position.

Benefits of technology

The accuracy of zero-position identification of long stator linear motor rotors is improved, the identification error when damping is large, and the motor control accuracy is improved.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119766033A_ABST
    Figure CN119766033A_ABST
Patent Text Reader

Abstract

The present application provides a method and system for identifying the zero position of a long-stator linear motor mover. The mover zero position identification method includes the following steps: Step S1: Start the long-stator linear motor in a manner of given excitation current id=idRef and torque current iq=0, and the mover stops at point A after linear displacement; Step S2: Take point A as the reference point, fix the mover at the reference point, install the cable 11 and the dynamometer 12, and the two ends of the cable 11 are respectively installed at the first end on the same side of the mover 21 and the stator 22, and the dynamometer 12 is fixed on the cable 11 to measure the tension on the cable 11; Step S3: Determine the zero position by adjusting the phase angle with an angle step of T1. The present application solves the technical problem of low zero position identification accuracy in the traditional method for identifying the zero position of a long-stator linear motor mover.
Need to check novelty before this filing date? Find Prior Art