Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-29T07:43:18.100Z Has data issue: false hasContentIssue false
  • English
  • Français

Impact of The High-Energy Product Materials on Magnetic Circuit Design

Published online by Cambridge University Press:  25 February 2011

Herbert A. Leupold ,
Ernest Potenziani II ,
John P. Clarke  and
Douglas J. Basarab
Herbert A. Leupold
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
Ernest Potenziani II
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
John P. Clarke
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
Douglas J. Basarab
Affiliation:
Electronics Technology and Devices Laboratory, Fort Monmouth, NJ 07703-5000
Get access

Abstract

Many devices that employ magnetic fields are encumbered by massive solenoids with their equally bulky power supplies or by inefficient permanent-magnet structures designed for use with obsolescent magnet materials. This paper describes how the high-energy product materials are employed in several structures to afford mass and bulk reductions of an order of magnitude or more. Also discussed are novel designs that are not attainable with the older materials such as the alnicos. Substitution of solenoids with permanent magnets also eliminates considerable energy consumption and the attendant problems arising from generation of heat. In many cases, all this is accomplished within leakage-free systems. Among the designs described are: nuclear magnetic resonance imagers; cylindrical solenoidal field structures for klystrons and nonperiodic field TWT's; cylindrical field structures with arbitrary axial gradients for advanced gyrating beam sources; annular field sources for high harmonic gyrotrons; helical transverse field sources for circularly polarized radiation sources; miniature periodic permanent-magnet configurations; and clad permanent-magnet circuits for biasing fields in millimeter-wave filters. Where alternate designs exist, they are compared with regard to performance, bulk, and economy. All of the structures are in various stages of design and construction, and, for completed structures, comparisons are made between theoretical projections and actual performance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 96: Symposium F – High Performance Permanent Magnet Materials , 1987 , 279
Copyright
Copyright © Materials Research Society 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1 Roters, H. C., Electromagnetic Devices, Chapters 4 & 5, (Wiley, New York, (1941).Google Scholar
2 Parker, R. J. and Studders, R. J., Permanent Magnets and Their Application, Chapters 4 & 5, (Wiley, New York, London, 1962).Google Scholar
3 Leupold, H. A., in Proceedings of the Fifth International Workshop on Rare-Earth-Cobalt Permanent Magnets and Their Applications, Roanoke, VA, June 7–10 1981, p. 270.Google Scholar
4 Leupold, H. A., “A Magnetic Design Primer,” Part V, summer short course, Modern Permanent Magnets, Applications and Design, May 19–23, 1986, p. 140.Google Scholar
5 Neugebauer, W. and Branch, E. M., “Applications of Cobalt Samarium Magnets to Microwave Tubes,” Technical Report, Microwave Tube Operation, General Electric (15 March 1972).Google Scholar
6 Rothwarf, F., Leupold, H. A. and Jasper, L. J. Jr., Proc. of the Third International Workshop on Rare-Earth Magnets and Their Applications, p. 255, Ed. K. J. Strnat (1978).Google Scholar
7 Tauber, A., Leupold, H. A. and Rothwarf, F., Proc. of the Eighth International Workshop on Rare Earth Magnets and Their Applications, p. 103 K. J. Strnat (1985).Google Scholar
8 Clarke, J. P. and Leupold, H. A., IEEE Transactions on Magnetics, MAG 22, No. 5, p. 1063 (1986).Google Scholar
9 Potenziani, E. II and Leupold, H. A., IEEE Transactions on Magnetics, MAG 22, No. 5, p. 1078 (1986).Google Scholar
10 Furuno, D. S., McDermott, D. B., and Luhmann, N. C. Jr., Proceedings of IEDM, p. 346, Los Angeles, CA, December 7–10 1986.Google Scholar
11 McDermott, D. B., Luhmann, N. C. Jr., Furuno, D. S., Kupiszewski, A., and Jory, H. R., Int. J. I. R. and Millimeter Waves 4, 639 (1983).Google Scholar
12 Dionne, N. J., Proceedings of IEDM, p. 513, Los Angeles, CA, Dec. 7–10, (1986).Google Scholar
13 Clarke, J. P., Potenziani, E. II, and Leupold, H. A., 31st Annual Conference on Magnetism and Magnetic Materials, Paper BP-17, Baltimore, MD, Nov. 17–20 (1986). (To be published in J. A. P.)Google Scholar
14 Battacletti, J. H. and Knox, T. A., IEEE Trans. Magn., MAG 21 (5), 1874 (1985).Google Scholar
15 Leupold, H. A., Clarke, J. P., Lockwood, W. E., and Meyers, D. J., Proceedings of IEDM, p. 693, Los Angeles, CA, Dec. 7–10 (1986).Google Scholar
16 Leupold, H. A. and Clarke, J. P., submitted for publication in Electron Devices Society Transactions; Part II, Vacuum Electron Devices.Google Scholar
17 Halbach, Klaus, Proceedings of the Eighth International Workshop on Rare-Earth Magnets and their Applications, p. 128, Dayton, OH, May 1985.Google Scholar
18 Morcos, A. B. C., University of Dayton, School of Engineering, M.S. Thesis, November, 1985.Google Scholar
19 Leupold, H. A. and Potenziani, E. II, Intermag Paper GH-12, Tokyo, Japan, April 14–17, 1987.Google Scholar
20 Leupold, H. A. and Potenziani, E., IEEE Trans., Magnetics, (to appear September, 1987).Google Scholar
21 Phillips, R. M., IRE ED–7, p. 231 (1960).Google Scholar
22 Jackson, R. H. and Pershing, D. E., Proceedings of IEDM, p. 86, Los Angeles, CA, Dec. 7–10, 1986.Google Scholar
23 Morcos, A. B. C., Potenziani, E. II, and Leupold, H. A., IEEE Transactions on Magnetics, MAG 22, No. 5, p. 1066, 1986.Google Scholar