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A Two-Phase Framework for Linear Permanent-Magnet Machines and Multi-Axis Stages With Magnetic Levitation

[+] Author Affiliations
Vu Huy Nguyen, Won-jong Kim

Texas A&M University, College Station, TX

Paper No. DSCC2014-5936, pp. V003T45A001; 10 pages
doi:10.1115/DSCC2014-5936
From:
  • ASME 2014 Dynamic Systems and Control Conference
  • Volume 3: Industrial Applications; Modeling for Oil and Gas, Control and Validation, Estimation, and Control of Automotive Systems; Multi-Agent and Networked Systems; Control System Design; Physical Human-Robot Interaction; Rehabilitation Robotics; Sensing and Actuation for Control; Biomedical Systems; Time Delay Systems and Stability; Unmanned Ground and Surface Robotics; Vehicle Motion Controls; Vibration Analysis and Isolation; Vibration and Control for Energy Harvesting; Wind Energy
  • San Antonio, Texas, USA, October 22–24, 2014
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-4620-9
  • Copyright © 2014 by ASME

abstract

This paper presents the electromagnetic design and experimental validation of a new framework for linear permanent-magnet (PM) machines with magnetic levitation. In this framework, a single forcer, which can generate two force components in two perpendicular directions, consists of a stationary Halbach magnet array and two Lorentz coils with a phase difference of 90° or 270°. Any number of coil pairs can be attached on the same moving frame to work with a common magnet array or matrix, forming a linear or planar permanent-magnet motor. Key advantages of this framework are simple force calculation, linear force, and a reduced number of coils for force generation and allocation in multi-axis positioners. The proposed framework effectively allows for decoupled dynamics of multi-axis stages, simplifying their linear controller design and real-time implementation. This framework is experimentally verified by a high-precision 6-degree-of-freedom (6-DOF) magnetically–levitated (maglev) stage.

Copyright © 2014 by ASME

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