Permanent magnet synchronous motor harmonic suppression method, device and medium

CN122371772APending Publication Date: 2026-07-10HUNAN UNIV
View PDF 0 Cites -1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN UNIV
Filing Date
2026-04-27
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing harmonic suppression methods for permanent magnet synchronous motors suffer from fixed motor parameters, which fail to reflect the nonlinear characteristics of the motor at different operating points. Furthermore, the control algorithm lacks self-learning and adaptive capabilities, and the inductance parameters are not updated in real time, resulting in insufficient harmonic suppression accuracy and affecting the motor's operational stability and efficiency.

Method used

By acquiring the d-axis current, q-axis current, and electrical angular velocity of the permanent magnet synchronous motor, the corresponding fundamental voltage and harmonic current are determined. An adaptive harmonic suppression method is used to compensate for the fundamental voltage, and the suppression strategy is dynamically adjusted to achieve precise motor drive.

Benefits of technology

It improves the harmonic suppression effect and operating stability of permanent magnet synchronous motors under complex working conditions, avoids the accumulation of voltage decoupling and compensation calculation errors, and enhances the overall operating performance and reliability of the motor.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122371772A_ABST
    Figure CN122371772A_ABST
Patent Text Reader

Abstract

This application relates to the field of harmonic suppression technology, and discloses a method, device, and medium for harmonic suppression of permanent magnet synchronous motors (PMSMs). The method includes: acquiring the d-axis current, q-axis current, and electrical angular velocity of the PMSM; determining the corresponding d-axis fundamental voltage, q-axis fundamental voltage, fifth harmonic current, and seventh harmonic current based on the d-axis current, q-axis current, and electrical angular velocity; performing adaptive harmonic suppression on the fifth and seventh harmonic currents, and compensating the d-axis and q-axis fundamental voltages based on the adaptive harmonic suppression output to obtain the d-axis drive voltage and q-axis drive voltage; and driving the PMSM based on the d-axis drive voltage and q-axis drive voltage. The embodiments of this application can improve the harmonic suppression performance and control accuracy of PMSMs under complex operating conditions.
Need to check novelty before this filing date? Find Prior Art