PAGE TITLE
Overview
PAGE SUMMARY
Researchers at Drexel University have created a process to manufacture soft magnetic composites (SMCs) that withstand high temperatures for use in electromagnetic devices. Oxide coated ferrous powders are magnetically permeable, electrically resistive, and mechanically durable to allow for complex shapes to be produced. Traditional electric motors utilize silicon steel laminations; however, they are inefficient at high frequencies and often result in overheating due to eddy currents. By using an oxide material as an insulating layer between ferrous powders, eddy currents can be significantly reduced to avoid thermal losses. A distinct advantage of SMCs is the reduction in weight and size, since a much lower applied field is needed to produce the same response as laminations. Other key advantages of using powder metallurgy techniques is the reduction of production cost and improvement in efficiency, due to minimal manufacturing waste. Overall, ferrous powders coated with oxide material will allow electromagnetic devices to perform at higher frequencies, needed for improved efficiency.
APPLICATIONS
TITLE: Applications
Powder metallurgy industry
Electromagnetic cores (AC and DC) such as Electric motors, Inductors and Transformers
Information technology such as computer hard-drives and memory storage
Energy conversion industry
ADVANTAGES
TITLE:Advantages
Reduced eddy current losses
3D magnetic flux carrying capabilities
Formation in complex shapes
Minimal processing needed, greatly reduced manufacturing costs and efficiency
FIGURES: Insert Figure Image Inside Figure Tags within Editor
Figure 1
Figure 1 Caption:
Replacing laminations with individually insulated ferrous powders to reduce eddy currents by confining them to single particles.
IP STATUS
Intellectual Property and Development Status
United States Utility Patent Pending- 18/594,260
PUBLICATIONS
References
Pubinfo should be the citation for your publication. Publink is the full url linking to the publication online or a pdf.
K.J. Sunday, K. Darling, and M.L. Taheri, “Thin Ferrite Films Compared to Oxide Coated Iron Powder for Electromagnetic Devices.” TMS Annual Meeting & Exhibition, San Diego, CA, Feb. 2014, Presentation.
S.R. Spurgeon, C.R. Winkler, B.J. Kirby, C.L. Johnson, and M.L. Taheri, “A multi-scale analysis of the structural and magnetic properties of oxide coatings for iron powders used in electromagnetic applications.” Proceedings of the PowderMet 2010 Conference, 29 June 2010.
Commercialization Opportunities
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Contact Information
Web Site
http://dcg.materials.drexel.edu
For Technical Information:
For Intellectual Property and Licensing Information:
Elizabeth Poppert, Ph.D.
Licensing Manager
Phone: 1-215-895-0999
Email: lizpoppert@drexel.edu