Method for controlling non-radial displacement transducer of multi-phase and single-winding bearingless motor

A bearingless motor and radial displacement technology, which is applied in motor generator control, electronically commutated motor control, electronic commutator, etc., can solve problems such as detecting rotor radial displacement, and reduce system cost and reduce system cost. Volume, cost reduction effect

Inactive Publication Date: 2011-09-14
ZHEJIANG UNIV
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This innovation proposes an improved way to operate multiple phase motors more efficiently while reducing costs compared to existing methods that rely on physical positioning or expensive components such as encoders. It also allows for redundancy in controller design rather than requiring extra power input from external sources like servo systems. Overall, it provides technical benefits over conventional techniques used today.

Problems solved by technology

Technological Problem: Current Bearingless Motor Controlled Permanently By Existing Methods To Improve Its Performance Overall, There Is No Protocol Between Different Types Of Magnet Synchronous Motion Machines Using Self Induction Information Theory - The technical problem addressed in these Patents relates to improving the accuracy and efficiency of determining the location of the axis's movement without increasing costs associated with external devices like encoders used during measurement processes.

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 controlling non-radial displacement transducer of multi-phase and single-winding bearingless motor
  • Method for controlling non-radial displacement transducer of multi-phase and single-winding bearingless motor
  • Method for controlling non-radial displacement transducer of multi-phase and single-winding bearingless motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention is further described below in conjunction with the accompanying drawings:

[0024] like figure 1 As shown, the control method of the multi-phase single-winding bearingless motor without radial displacement sensor is:

[0025] Detect the current of each phase of the motor and the line voltage of the adjacent phase, and convert them to the following orthogonal d q plane coordinate systems of the motor through the multi-phase coordinate transformation link,

[0026]

[0027] in the formula represents the coordinate transformation matrix, is the rotor position angle, , when n is odd, the transformation matrix should delete the last row;

[0028] Select the d3-q3 plane which is different from the torque plane and the suspension plane in the multi-phase single-winding bearingless motor as the signal plane, keep the current of this plane at 0 through the current closed loop, and use the current feedback signal of the d2-q2 plane and the d3- After

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 controlling a non-radial displacement transducer of a multi-phase and single-winding bearingless motor. The control for torque and suspension of the multi-phase and single-winding bearingless motor is finished in two planes which are orthorhombic mutually; and a multi-phase inverter is utilized to simultaneously introduce two groups of currents with different phase differences to the motor, thus respectively realizing the torque drive and the rotor suspension of the motor. With respect to the multi-phase and single-winding bearingless motor with the phase number of more than or equal to 7, displacement signals are extracted from another plane different from a torque plane and a suspension plane according to the the characteristics of MDOF (multiple degree of freedom) of the multi-phase motor by utilizing the relationship between mutual inductance and eccentricity among different planes in an eccentric state, so as to research the non-displacement transducer control technology of the motors. In the method, the multi-control DOF of the multi-phase and single-winding bearingless motor is utilized to extract radial displacement information of a rotor under fundamental frequency, thus reducing the system cost, shortening the radial length of a system and improving the system reliability.

Description

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

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
Owner ZHEJIANG UNIV
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