| 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: |
 Click here to retrieve PDF version of paper (503KB) |
