Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Permanent magnet synchronous motor sensorless control method based on high-frequency signal injection

A permanent magnet synchronous motor and high-frequency signal technology, which is applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problem of reducing system control performance and other issues

Active Publication Date: 2019-07-16
SOUTHEAST UNIV
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the high-frequency current of the d-axis response will generate high-frequency electromagnetic torque ripple, which will reduce the control performance of the 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
  • Permanent magnet synchronous motor sensorless control method based on high-frequency signal injection
  • Permanent magnet synchronous motor sensorless control method based on high-frequency signal injection
  • Permanent magnet synchronous motor sensorless control method based on high-frequency signal injection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] The basic idea of ​​the present invention is to obtain the optimal high-frequency current angle and the optimal high-frequency voltage angle based on the principle of minimizing the high-frequency ripple of the electromagnetic torque when distributing the high-frequency voltage components injected by the d-axis and the q-axis; When calculating the estimated value of the rotor position, the high-frequency current component of the control response is 0 at the orthogonal position of the optimal high-frequency current angle, so that the error of the estimated value of the rotor position is 0, thereby obtaining an accurate estimated value of the rotor position.

[0048] 1. Description of the basic principles

[0049] 1. Permanent magnet synchronous motor voltage equation and coordinate transformation

[0050] The mathematical model of permanent magnet synchronous mo...

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 permanent magnet synchronous motor sensorless control method based on high-frequency signal injection. Due to the existence of the magnetic resistance torque of an interior permanent magnet synchronous motor, when a sensorless algorithm based on traditional high-frequency pulse vibration voltage signal injection is adopted, electromagnetic torque high-frequency pulsationis generated, especially in a control method when the non-id is equal to 0, the high-frequency pulsation of the electromagnetic torque is more obvious. When the injected d-axis and q-axis high-frequency voltage components are distributed, the minimum electromagnetic torque high-frequency pulsation is taken as the principle, the optimal high-frequency current angle and the optimal high-frequency voltage angle are obtained according to a torque formula, and the most appropriate high-frequency voltage injection direction is selected; when a rotor position estimation value is calculated, the responded high-frequency current component is controlled to be zero at the orthogonal position of the optimal high-frequency current angle, so that the error of the rotor position estimation value is zero,and an accurate rotor position estimation value is obtained. According to the method, the electromagnetic torque high-frequency pulsation caused by high-frequency signal injection can be effectivelyreduced, so that the performance of a sensorless control system is improved.

Description

technical field [0001] The invention belongs to the field of motor drive and control, in particular to a position sensorless control system of a permanent magnet synchronous motor based on high-frequency signal injection. Background technique [0002] The high-performance speed control of permanent magnet synchronous motors generally requires position sensors, such as rotary encoders and photoelectric encoders. Installing a position sensor is not only costly, bulky, and low in mechanical reliability, but also causes concentricity problems during installation. Using a highly reliable position sensorless control algorithm is an effective solution. [0003] When the permanent magnet synchronous motor runs at zero or low speed, a high-frequency voltage signal injection algorithm based on the salient pole effect of the motor is often used, which can inject different forms of voltage signals in different reference coordinate systems. In recent years, there are relatively mature r...

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
IPC IPC(8): H02P21/24H02P21/18H02P6/10
CPCH02P6/10H02P21/18H02P21/24
Inventor 花为唐爱慧王益
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products