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

Non-synchronous motor parameter identification method

An asynchronous motor and parameter technology, which is used in the control of generators, motor control, motor generator control, etc., can solve the problems of large program calculation, complex identification process, and low identification parameter accuracy, so as to improve accuracy and stability. sexual effect

Inactive Publication Date: 2002-06-19
SOMER LEROY ELECTRO TECH FUZHOU CO LTD
View PDF0 Cites 54 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have disadvantages such as low precision of identification parameters, or complex identification process, resulting in a large amount of program calculation, which requires a higher processing speed of the processor and strict requirements on the system hardware, so it is difficult to be practical in engineering.

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
  • Non-synchronous motor parameter identification method
  • Non-synchronous motor parameter identification method
  • Non-synchronous motor parameter identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The method of the present invention is a high-precision off-line identification method that is practical in engineering. The method utilizes the traditional electromechanical test principle, and at the same time considers in detail the conduction voltage drop, switch delay, dead time and The influence of the skin effect, through correct compensation to achieve high accuracy of identification parameters.

[0035] The method is based on the figure 2 In the steady-state equivalent circuit of the motor shown, the identified parameters are all parameters in the steady-state equivalent circuit.

[0036] Such as image 3 As shown, this method is an off-line parameter identification method used in a voltage-type AC-DC-AC frequency conversion speed regulation system. This method includes three processes: stator resistance identification test, short-circuit test and no-load test , the implementation methods of these three steps will be introduced in detail below.

[0037] 1. ...

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 relates to a method for recognizing parameters of asynchronous motor. The stator resistance of motor is measured by a method of DC volt-ampere. The rotor resistances as well as leakage inductance of stator and rotor of motor is obtained by short circuit test. Mutual inductance of stator and rotor of motor can be taken from method of no-load test. Compensating voltage drop in on state, switch time delay and dead time raises the accuracy and stability of recognized parameter. The resistance values of rotor at frequency of rating sliding difference are calculated by method of two points through test of locked rotor at two frequencies. Since skin effect is overcome, the resistance values of rotor are accurate enough so as to meet the requirement of vector control system completely.

Description

technical field [0001] The present invention relates to motor technology, more specifically, to a method for obtaining parameters of asynchronous motors in vector control or direct torque control frequency conversion speed regulation systems, which can be used as an independent module to identify asynchronous motors in such systems parameter. Background technique [0002] The vector control system of the asynchronous motor is a high-precision frequency conversion speed regulation system based on the rotor flux remaining constant and the instantaneous torque controllable by the field orientation method. The performance of the vector control system depends entirely on the accuracy of the motor parameters used in it. If the motor parameters are inaccurate, it will directly lead to the decline of the performance index of the vector control and even the failure of the inverter. [0003] The block diagram of a common vector control system such as figure 1 shown, from figure 1 I...

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): G01R31/34H02P21/16
CPCH02P21/145G01R31/34H02P2207/01H02P21/16
Inventor 刘宏鑫张科孟王玉雷
Owner SOMER LEROY ELECTRO TECH FUZHOU CO LTD
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