Thermal contact resistance between an element and a housing in an aluminum electrolytic capacitor
✍ Scribed by Osamu Suzuki; Kaname Sasaki; Heikichi Kuwahara
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 642 KB
- Volume
- 32
- Category
- Article
- ISSN
- 1099-2871
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✦ Synopsis
Abstract
Cooling performance of an aluminum electrolytic capacitor, whose element pressed on the inner bottom surface of the capacitor housing in order to decrease thermal contact resistance between the element and the housing, was measured and improved. It was found that a thermally conductive elastomer decreases this contact resistance. The elastomer with a thickness ranging from 0.5 to 1.5 mm was inserted between the bottom surface of the capacitor element and the plain metal surface. Experimental measurements show that the contact resistance with the 0.5‐mm‐thick elastomer is smaller than that without an elastomer. A simple analysis was also developed for predicting the thermal contact resistance with different elastomer thicknesses, and these predicted resistances agree reasonably well with the experimental measurements. © 2003 Wiley Periodicals, Inc. Heat Trans Asian Res, 32(3): 268–277, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.10090