Cart (Loading....) | Create Account
Close category search window
 

AC losses of high-field superconductors

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

1 Author(s)
Hanrahan, D.J. ; Naval Research Laboratory, Washington, D.C.

The Riemersma critical state model is applied to a long irreversible type-II superconductor carrying ac. Voltage waveforms, energy loss per cycle, and limiting values of effective resistivity are derived. For sinusoidal current of frequency f in 10-mil wire the critical current limit of resistivity is 4.06 × 10-14f (ω.m). An equivalent circuit consisting of a variable inductance is proposed. Ex-perinlents at 4.2°K on bifilar windings of bare and copper-plated single-strand 10-mil nb-25Zr wire at 60, 400, and 800 Hz gave only fair agreement with the model with indications that the model can be improved by including surface hysteresis and eddy-current effects. Experimental values of resistivity agree more with Zar than with Wisseman, leading to the conclusion that continuous ac power applications of superconductivity are not attractive for the sake of efficiency. There remains some promise for dc energy storage for discharge into pulse power devices.

Published in:

Magnetics, IEEE Transactions on  (Volume:6 ,  Issue: 4 )

Date of Publication:

Dec 1970

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.