Method for suppressing torque ripple of permanent magnet synchronous motor

A permanent magnet synchronous motor, torque pulsation technology, applied in torque pulsation control, generator control, electromechanical brake control, etc. The effect of suppressing torque ripple and reducing observation errors

Inactive Publication Date: 2021-03-12
XIAN THERMAL POWER RES INST CO LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when PMSM operates at medium and low speeds, it is susceptible to torque ripple, and there are problems such as cycle delays in current and voltage sampling and inverter output, which will lead to poor dynamic performance of the entire motor control system.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for suppressing torque ripple of permanent magnet synchronous motor
  • Method for suppressing torque ripple of permanent magnet synchronous motor
  • Method for suppressing torque ripple of permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings.

[0035] like figure 1 As shown, define dq axis and αβ axis coordinate system, where dq axis is the rotor field orientation coordinate system; αβ axis is the stator static coordinate system; θ e is the electrical angle of rotor rotation; ω e is the electrical angular velocity of the rotor rotation, that is, the angular frequency of the stator current rotation; u s i s , Ψ s , Ψ r They are stator voltage vector, stator current vector, stator flux vector and rotor flux vector respectively. Variables with a '^' superscript indicate estimated values. The mathematical model of PMSM in the dq rotating coordinate system is:

[0036]

[0037] In formula (1): i d i q , u d , u q d, q axis current and voltage; R is stator resistance; Ψ d , Ψ q is the d, q axis stator winding flux linkage; u f i f , R f is the rotor voltage, curr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for suppressing torque ripple of a permanent magnet synchronous motor. The method comprises the following steps of establishing a mathematical model of the permanent magnet synchronous motor PMSM under a dq rotating coordinate system; establishing a load torque expression of the PMSM in the dq rotating coordinate system; adopting a disturbance torque observer to estimate the current compensation amount corresponding to a disturbance torque in real time; establishing an improved disturbance torque observer; obtaining a transfer function variable quantity; obtaining a sensitivity function and a supplementary sensitivity function of a transfer function; verifying the stability of the improved disturbance torque observer; and introducing the improved disturbance torque observer into a PMSM torque control system, so that the effect of restraining PMSM torque pulsation is achieved. According to the invention, the torque observer is adopted to suppress the voltage error generated by the disturbance torque, a quasi-differential observer is constructed to suppress the amplification effect of a differential link on the error signal, and the anti-interferencecapability of the control system is improved when the PMSM operates at a medium-low speed.

Description

technical field [0001] The invention relates to a method for suppressing the torque ripple of a permanent magnet synchronous motor. The method is used to solve the problem that the control system is easily affected by the torque ripple when the motor is running at a medium and low speed. A disturbance torque observer is used to suppress the generation of disturbance torque voltage error. Background technique [0002] Permanent magnet synchronous motor (Permanent Magnet Synchronous Motor, PMSM) has been widely used in industry, especially in mining work such as locomotive traction and winch lifting, because of its strong load capacity. As a new type of stator frequency self-controlled synchronous motor, Compared with synchronous motors, PMSM can effectively solve the problem of rotor oscillation and out-of-step due to the self-controlled frequency modulation working mode, so it has been widely used in industry. However, when PMSM runs at medium and low speeds, it is suscepti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13H02P6/10H02P21/05
CPCH02P21/13H02P6/10H02P21/05H02P2207/05
Inventor 杨沛豪孙钢虎柴琦寇水潮黄修喜高峰孙梦瑶李志鹏郭新宇张立松赵守柱
Owner XIAN THERMAL POWER RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap