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Publication Citation: Current supply for high-Tc superconductor testing

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Author(s): Loren F. Goodrich; S L. Bray;
Title: Current supply for high-Tc superconductor testing
Published: January 18, 1990
Abstract: Precise and accurate measurements of the DC critical current of high-Tc superconductors often require a current supply that has high input-to-output isolation, high isolation from ground and low output ripple. Also, to ensure precise current control, the supply should have low current drift and its input-output characteristic should be linear. A design for a simple and inexpensive current supply that has these characteristics is presented. The primary power sources is a 12 V wet-cell battery and the typical operating range is from 10mA to 10 A. The supply's current ripple is < 0.4mA RMS over this operating range. At an output current of 5 A the current drift is <2% h^-1 without a warm-up period. The maximum variation of the supply's output from linearity, over its full operating range is <5%
Citation: Measurement Science and Technology
Volume: 1
Pages: pp. 491 - 494
Keywords: Current; superconducting; testing
Research Areas: Electromagnetics
PDF version: PDF Document Click here to retrieve PDF version of paper (515KB)