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

Induction motor speed sensorless drive control method based on virtual voltage injection

A speed sensorless, induction motor technology, used in motor generator control, electronic commutation motor control, motor control, etc., to solve problems such as instability

Active Publication Date: 2018-09-28
HUAZHONG UNIV OF SCI & TECH +1
View PDF1 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem of instability of the existing induction motor sensorless control system at low synchronous speed and zero synchronous speed

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
  • Induction motor speed sensorless drive control method based on virtual voltage injection
  • Induction motor speed sensorless drive control method based on virtual voltage injection
  • Induction motor speed sensorless drive control method based on virtual voltage injection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1 The control system inputs the value u through the stator voltage command of the motor in the αβ coordinate system sα , u sβ and flux observer stator voltage input value A virtual voltage injection module is added in between, and the control method of the whole system is introduced below, including steps S1 to S5.

[0066] S1. Calculate k based on the parameters of the induction motor, k is the proportional relationship in the virtual voltage injection module, and the calculation formula is as follows:

[0067]

[0068] Among them, p is a constant greater than zero, and the value is taken according to the stability of the induction motor speed and torque; R r is the rotor resistance of the induction motor; L m is the mutual inductance of the induction motor; L r is the rotor side inductance of the induction motor.

[0069] After the proportional relationship k is calculated, it exists in the form of a constant in the motor controller, and its value ...

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 an induction motor speed sensorless drive control method based on virtual voltage injection, firstly, a virtual voltage signal is injected into a motor magnetic chain and a rotation speed observer, thus, difference exists between input of the motor magnetic chain and the rotation speed observer and instruction input of the motor; secondly, any type of the motor magnetic chain and the rotation speed observer are taken as a basis, and consequently, a rotation angle of the motor magnetic chain and a rotation speed of a motor rotor are estimated, and the induction motor isdriven by certain control strategy (such as vector control) to run regularly; then, according to the the signal designed by the method and only injected into the motor magnetic chain and the rotationspeed observer, the induction motor driven by an induction motor speed sensorless drive control system is guaranteed to output 150% rated torque while running with low synchronous speed and running without synchronous speed, and can keep stability of the rated torque for long time.

Description

technical field [0001] The invention belongs to the field of motor control, in particular to a speed sensorless drive control method for an induction motor based on virtual voltage injection. Background technique [0002] Induction Motor (IM for short) is an AC motor that relies on electromagnetic induction to induce current in the rotor to achieve electromechanical energy conversion. It is essentially an asynchronous motor (Asynchronous Motor). [0003] Motor speed detection devices mostly use speed sensors. The installation of these speed sensors increases the cost of the motor control system. In addition, speed sensors are not suitable for harsh environments such as humidity, vibration, and electromagnetic noise interference, thus limiting their application range. Therefore, the speed sensorless technology, that is, how to quickly and accurately estimate the speed value of the motor through the known speed control system parameters, has become another hot spot in today's ...

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): H02P21/04H02P21/28H02P21/18H02P21/13H02P27/12
CPCH02P21/04H02P21/13H02P27/12H02P21/18H02P21/28H02P21/14H02P23/12H02P23/14H02P2207/01H02P6/183H02P21/0021
Inventor 孙伟徐殿国
Owner HUAZHONG UNIV OF SCI & TECH
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com