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

Starting procedure of open-loop vactor control in synchronous machine

A synchronous motor and vector control technology, applied in the starter, vector control system, motor generator control and other directions of a single synchronous machine, can solve the problem of not eliminating system errors, and achieve the effect of reliable starting

Inactive Publication Date: 2002-05-22
ABB AS
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While one method can take several measurements in each direction and calculate the average from the measured inductance, this method does not eliminate the effect of systematic errors

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
  • Starting procedure of open-loop vactor control in synchronous machine
  • Starting procedure of open-loop vactor control in synchronous machine
  • Starting procedure of open-loop vactor control in synchronous machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] According to the present invention, start-up of open-loop vector control in a synchronous machine firstly involves determining the stator inductance model L of the synchronous machine s =L s0 +L s2 cos2θ r A step of. This equation tells how the inductance varies according to the rotor angle in the stationary frame. Thus this equation shows that when the rotor rotates by a certain angle θ r How does the inductance measured in the x-axis direction of the stator coordinate system change when ?

[0024] When it is desired to determine the initial rotor angle, it is not possible to rotate at different rotor azimuths to measure inductance. Instead, the stator coordinate system is rotated to an angle, and the inductance is measured in this direction. These rotatable stator frames are called virtual stator frames. image 3 Various coordinate systems are shown, and it is noted that the stator coordinate system is the coordinate system xy, the virtual stator coordinate sys...

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

A method for starting an open-loop vector control, includes steps of: determining a stator inductance model of the machine; measuring the stator iductance in a plurality of directions; arranging the measured inductances in the model to form model parameters resulting in minimum error; checking the polarity of rotor magnetization to verify the direction thereof; initializing flux linkages of the open-loop vector control according to the model parameters and the direction of rotor magnetization; and starting the machine by the open-loop vector control method.

Description

technical field [0001] The invention relates to a method for starting an open-loop vector control in a synchronous motor. The method includes judging the stator inductance mode of the synchronous motor and measuring the stator inductance in multiple directions. Background of the invention [0002] Vector control refers to a method of controlling an AC motor, which enables the flux linkage and torque of the motor to be independently controlled like a DC motor. In a DC motor, the direct current which affects the flux linkage and torque is controlled, while in an AC motor the amplitude and phase angle of the current must be controlled. Thus, the current vector is controlled, thereby realizing vector control. [0003] To perform vector control, the flux linkage and current of the motor must be known. The flux linkage of the motor is generated by the current action of the stator and rotor when the motor is induced. In a synchronous machine, the rotor current must be estimated ...

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): H02P1/52H02P6/20H02P21/34H02P27/06
CPCH02P21/0032H02P6/20H02P21/34H02P21/00
Inventor 朱利尤斯·鲁可
Owner ABB AS
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