By Topic

A magnetic bearing system using capacitive sensors for position measurement

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Ortiz Salazar, A. ; COPPE/Univ. Federal do Rio de Janeiro, Brazil ; Dunford, W. ; Stephan, R. ; Watanabe, E.

A capacitive sensor system for use in a bearingless induction motor is presented. Details of the circuit design are presented, and a theoretical step response is calculated and compared with experimental results. It is shown that one-dimensional position stability of an induction machine rotor can be obtained by controlling the currents in diametrically opposed conventional stator windings. In the case considered, the weight of the rotor was supported by a state current of 33% of the rated value. A margin is therefore available for the addition of a rotating component of current. The rotor of this machine has been reduced during development of the position sensor. It is anticipated that the system could be implemented with a smaller airgap and consequently a smaller steady-state current. The position signal was satisfactorily obtained using a simple airgap-mounted position-sensing system. An approximate model of the nonlinear system is sufficient for predicting the closed-loop step response for small perturbations

Published in:

Magnetics, IEEE Transactions on  (Volume:26 ,  Issue: 5 )