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Proceedings Paper

Improved optical feedback reference tracking for diamagnetically levitating motor system
Author(s): Wei-Chih Wang; Jefferey Vu; Shrey Khanna
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Paper Abstract

This paper describes the design and fabrication of an optical sensor to sense vertical displacement of a diamagnetically stabilized levitating rotor. The planar rotor described in this paper rotates due to nine electromagnetic coils evenly spaced around the rotor. A driving circuit allows current to flow through the coils one phase at a time. This produces a magnetic field strong enough to spin the rotor. However, instability due to a number of factors is prevalent in the present system. This instability is observed as vertical and horizontal displacement of the levitating rotor. The purpose of an additional optical sensor is to measure and record this vertical displacement and combine it with topsensing optical measurements in order to create a three-dimensional optical sensing mechanism around the rotor.

Paper Details

Date Published: 1 April 2011
PDF: 8 pages
Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841N (1 April 2011); doi: 10.1117/12.880671
Show Author Affiliations
Wei-Chih Wang, Univ. of Washington (United States)
Jefferey Vu, Univ. of Washington (United States)
Shrey Khanna, Univ. of Washington (United States)


Published in SPIE Proceedings Vol. 7984:
Health Monitoring of Structural and Biological Systems 2011
Tribikram Kundu, Editor(s)

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