Improved optical feedback reference tracking for diamagnetically levitating motor system

Wei-Chih Wang; Jefferey Vu; Shrey Khanna

doi:10.1117/12.880671

31 March 2011 Improved optical feedback reference tracking for diamagnetically levitating motor system

Wei-Chih Wang, Jefferey Vu, Shrey Khanna

Proceedings Volume 7984, Health Monitoring of Structural and Biological Systems 2011; 79841N (2011) https://doi.org/10.1117/12.880671
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

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.

Citation Download Citation

Wei-Chih Wang, Jefferey Vu, and Shrey Khanna "Improved optical feedback reference tracking for diamagnetically levitating motor system", Proc. SPIE 7984, Health Monitoring of Structural and Biological Systems 2011, 79841N (31 March 2011); https://doi.org/10.1117/12.880671

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