Passive magnetic suspension brushless D.C. motor

A brushed DC motor and magnetic levitation technology, applied in the direction of magnetic circuit shape/style/structure, electrical components, electromechanical devices, etc., to achieve the effect of improving system efficiency, simple control technology, and improving operational reliability

Inactive Publication Date: 2004-02-04
SHENYANG POLYTECHNIC UNIV
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems that bearingless motors and motors with active magnetic bearings need to perform dynamic detection of rotor position and real-time control of le

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
  • Passive magnetic suspension brushless D.C. motor
  • Passive magnetic suspension brushless D.C. motor
  • Passive magnetic suspension brushless D.C. motor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] As shown in the drawings, the present invention is mainly composed of two parts: a motor and a passive magnetic bearing. The motor is composed of a stator core 2 fixed on a housing 1, a stator winding 3 and a permanent magnet rotor 4 fixed on a rotor yoke 5 and a non-magnetically conductive rotating shaft 8. The stator core is made of laminated electrical steel sheets and has a certain number of slots for placing the stator windings. The power cords of the windings are led out through the holes in the housing 1. The permanent magnet rotor 4 is composed of radially magnetized permanent magnets. Passive magnetic bearings are composed of two sets of permanent magnet inner ring 7 and outer ring 6 with the same geometrical dimensions and magnetic properties. The axial magnetization direction of each group of permanent magnet rings is the same, and the axial magnetization direction of the two groups of permanent magnet rings in contrast. The inner ring of each permanent magnet ri...

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 brushless DC motor of passive magnetic suspension, it is made up of housing cover, stator, rotor, shaft, and two passive magnetic bearing; fix the motor's stator iron core in the housing cover, plate two group of permanent magnetic exterior ring of magnetic bearing at both left and righ side, the permanent interior ring of the rotor and two passive magnetic bearing fixes at a shaft that is made of non magnetic material, the magnetic bearing adopts axial lead magnet charging, the permanent magnet of the rotor adopts radial lead magnet charging. The current invention realizes the magnetic suspension of the electric machine of which the lift force are on need to control, saves the checking of the rotor displacement and the control device for lift force, promotes operational reliability and system efficiency.

Description

Technical field [0001] The invention belongs to a motor, in particular to a passive magnetic levitation brushless DC motor. Background technique [0002] Due to the absence of mechanical wear and noise, non-contact magnetic bearings are widely used in high-speed motors and special applications requiring maintenance-free bearings such as artificial heart rotary blood pumps. There are many kinds of non-contact rotating motors, the most attractive of which is the bearingless motor structure, the rotational torque and levitation force of the rotor are generated by the stator and rotor of the motor itself, without any traditional or magnetic bearings, however The complexity of torque and magnetic levitation force decoupling control technology limits the practical application of bearingless motors. Although the motor with active magnetic bearing can realize the decoupling control of electromagnetic torque and levitation force, its control technology is relatively simpler than tha...

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): F16C32/04H02K1/16H02K7/08H02K29/00
Inventor 王凤翔王继强孔志国宗鸣张凤阁
Owner SHENYANG POLYTECHNIC 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