NDLI: Five Millimeter Air Foil Bearing Operating at 350,000 RPM in a Micro Electric Motor Drive

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kim, Daejong Hossain, Md Saddam Son, Soo-Jung Choi, Chul-Jin Kra¨henbu¨hl, Daniel
Copyright Year	2011
Abstract	This paper presents works performed at University of Texas at Arlington in designing and testing mesoscale foil bearing in diameter of 5mm. The elastic foundation for the foil bearings were manufactured using X-ray lithography and electroplating of Ni. Top foils were made of 0.5mm thick Inconel X-750. Two different designs of elastic foundation are presented, and foil bearings made of these elastic foundations were tested using a brushless permanent magnet DC motor drive up to 350,000rpm stable operation without any subsynchronous vibrations. After confidence was gained in the design, one of the elastic foundation was replicated using a micro sintering process using nano scale Ni-Fe powders. The micro sintering process can reduce the production cost of the elastic foundation dramatically by eliminating the expensive X-ray lithography and electroplating. The sintering process could reproduce the original elastic foundation within +−2 μm deviation from prediction. The preliminary results demonstrate the micro sintering process is a promising cost-effective manufacturing process of the mesoscale foil bearings.
Sponsorship	Tribology Division
Starting Page	163
Ending Page	166
Page Count	4
File Format	PDF
ISBN	9780791854747
DOI	10.1115/IJTC2011-61146
Volume Number	ASME/STLE 2011 Joint Tribology Conference
Conference Proceedings	ASME/STLE 2011 International Joint Tribology Conference
Language	English
Publisher Date	2011-10-24
Publisher Place	Los Angeles, California, USA
Access Restriction	Subscribed
Subject Keyword	Design Motor drives X-ray lithography Vibration Sintering Permanent magnets Manufacturing Electroplating Foil bearings Electric motors Testing
Content Type	Text
Resource Type	Article

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