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Proceedings Paper

Optical encoder feedback system for levitating rotor system
Author(s): Shrey Khanna; Joe N. Ho; Jonathan Irwen; Gurjinder Rakka; Weichih Wang
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Paper Abstract

This paper describes the design and fabrication of feedback control system for a three phase motor with a diamagnetically levitating rotor. The planar rotor described in this paper uses a triangular configuration of magnets that rotates due to nine electric coils evenly spaced around the rotor. An optical mechanical feedback system controls the frequency at which the rotor spins. The current input to the coil is controlled by a mechanical relay circuit which latches based on a DC pulse signal generated by a PID control algorithm. The mechanical relay circuit allows current to flow to each coils (the actuators of this system), which then produces a magnetic field strong enough to spin the rotor.

Paper Details

Date Published: 8 April 2010
PDF: 12 pages
Proc. SPIE 7650, Health Monitoring of Structural and Biological Systems 2010, 76501Z (8 April 2010); doi: 10.1117/12.847713
Show Author Affiliations
Shrey Khanna, Univ. of Washington (United States)
Joe N. Ho, Univ. of Washington (United States)
Jonathan Irwen, Univ. of Washington (United States)
Gurjinder Rakka, Univ. of Washington (United States)
Weichih Wang, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 7650:
Health Monitoring of Structural and Biological Systems 2010
Tribikram Kundu, Editor(s)

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