Ferrite Transformers and Inductors at High Power

  • Alex Goldman
Part of the The Springer International Series in Engineering and Computer Science book series (SECS, volume 505)


In the early days of ferrites, industry employed them at extremely low power levels because the major application at that time was in the telecommunications industry. Since the signal levels were very low, the ferrite core operated in the linear region of the magnetization curve (Rayleigh region) which was characterized by the initial permeability, μo. Chapter 13 describes the action of ferrite cores under these conditions. So ingrained was the electronic industry’s preoccupation with the μo. property of materials that even when higher power level ferrites were developed, the ferrite material was still characterized through the initial permeability. To this day, the principal specification given in ferrite vendors’ catalogs is μo. even through this term has only little relevance to the actual application.


Power Transformer Core Loss Eddy Current Loss Power Inductor Ferrite Transformer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Analytic Artistry (1988), Inductor Spread Sheet, Analytic Artistry, Torrance CA.Google Scholar
  2. Bloom, G.(1989) Powertechnics April 1989, 19.Google Scholar
  3. Bracke, L.P.M, (1983) Electronic Components and Applications, Vol.5, #3 June 1983, p171.Google Scholar
  4. Bracke L.P.M (1982) and Geerlings, F.C., High Frequency Power Transformer and ChokeDesign, Part 1, NV Philips Gloeilampenfabrieken, Eindhoven, Netherlands.Google Scholar
  5. Buthker, C. (1986) and Harper, D.J., Transactions HFPC, 1986, 186.Google Scholar
  6. Carlisle, B.H.(1953), Machine Design, Sept. 12, 1985, 53.Google Scholar
  7. Carsten, B.(1986), PCIM, Nov. 1986, 34.Google Scholar
  8. Cattermole, P.(1988) and Cohn, Z., Proc. HFPC, May 1988, 111.Google Scholar
  9. De Maw, M.F.(1981), Ferromagnetic core Design and Applications Handbook, Prentice Hall, Englewood Cliffs, NJ, 1981.Google Scholar
  10. Dixon L. (1974), and Pale, R., EDN, Oct.20, 1974, 53 and Nov. 5,1974, 37.Google Scholar
  11. Estrov, A. (1989) and Scott, I., PCIM, May 1989.Google Scholar
  12. Finger, C.W. (1986), Power Conversion International, 1986.Google Scholar
  13. Forrester, S (1994) PCIM Dec. 1994, 6.Google Scholar
  14. Grossner, N.R(1983), Transformers for Electronic Circuits, McGraw-Hill Book Co., New York.Google Scholar
  15. Hanna, C.R., J.Am. (1927) I.E.E., 46, 128.Google Scholar
  16. Haver, R.J. (1976), EDN, Nov.5, 1976, 65.Google Scholar
  17. Hess, J (1985) and Zenger, M., Advances in Ceramics, Vol.16 501.Google Scholar
  18. Hiramatsu, R. (1983) and Mullett, C.E., Proc. Powercon 10, F2, 1.Google Scholar
  19. Hnatek, E.R.(1981), Design of Solid State Power Supplies, Van Nostrand Reinhold, New York.Google Scholar
  20. IEC ( ) Document 435, International Electrotechnical Commission Jongsma, J.(1982), High Frequency Ferrite Power Transformer and Choke Design, Part 3, Pilips Gloeilampenfabrieken,Eindhoven Netherlands.Google Scholar
  21. Jongsma, J.(1982a) and Bracke, L.P.M. ibid Part 4.Google Scholar
  22. Kamada, A. (1985) and Suzuki, K. Advances in Ceramics Vol.16, 507.Google Scholar
  23. Kepco (1986), Kepco Currents, Voll#2.Google Scholar
  24. Magnetics (1987) Ferrite Core Catalog, Magnetic Div., Spang and Co, Butler, PA 16001.Google Scholar
  25. Magnetics (1984) Bulletin on Materials for SMPS.Google Scholar
  26. Martin, H., (1984), Proc. Powercon 11, Bl, 1.Google Scholar
  27. Martin, W.A (1978), Electronic Design, April 12, 1978, 94.Google Scholar
  28. Martin, W.A (1986), Powertechnics Magazine, Feb.l986, p.19.Google Scholar
  29. Martin, W.A (1982), Proc. Powercon 9.Google Scholar
  30. Martin, W. A (1987), Proceedings, Power Electronics Conference (1987).Google Scholar
  31. Martinelli, R. (1988), Powertechnics, Jan. 1988.Google Scholar
  32. McLyman, Col. W.T.(1969) JPL, Cal Inst. Tech. Report 2688-2.Google Scholar
  33. McLyman, Col.W.T., (1982), Transformer and Inductor Design Handbook, Marcel Dekker, New York.Google Scholar
  34. McLyman, Col. W.T.(1982), Magnetic Core Selection for Transformers and Inductors, Marcel Dekker, New York.Google Scholar
  35. McLyman, Col. W.T. (1990) KG Magnetics Magnetic Component Design Software Program.Google Scholar
  36. Mochizuki, T.(1985), Sasaki, I. and Torii, M., Advances in Ceramics Vol. 16, 487.Google Scholar
  37. Nakamura, A.(1982) and Ohta, J., Proc.Powercon 9, C5, 1.Google Scholar
  38. Ochiai, T and Okutani, K, ibid, 447.Google Scholar
  39. Pressman, A (1977) Switching and Linear Power Supply Converter Design, Hayden Book Co., Rochelle Park, N.J..Google Scholar
  40. Philip Catalog,(1986) Book C5, Philips Components and Materials Div., 5600Md, Eindhoven, Netherlands.Google Scholar
  41. Roddam, T.(1963), Transistor Inverters and Converters, Iliffe, London and Van Nostrand Reinhold, New York.Google Scholar
  42. Roess, E.(1982), Transactions Magnetics MAG 18, #6, Nov. 1982.Google Scholar
  43. Roess, E.(1986), Proc. 3rd Conf. on Phys Mag Mat. Sept.9-14, 1986, Szczyrk-Bita, Poland, World Scientific.Google Scholar
  44. Roess, E.(1987) ERA Report-0285.Google Scholar
  45. Sano, T. (1988), Morita, A and Matsukawa, A., Proc. PCIM, July 1988, 19.Google Scholar
  46. Sano, T. (1988a) Morita, A and Matsukawa, A, Proc. HFPC.Google Scholar
  47. Schlotterbeck, M.(1981), and Zenger, M. Proc. PCI 1981, 37.Google Scholar
  48. Severn, R.P. (1985) and Bloom, G.E., Modern D.C. to A, C. Switchmode Power Converter Circuits, Van Nostrand Reinhold, N. Y..Google Scholar
  49. Siemens (1986-7) Ferrites Data Book, Siemens AG, Bereich Bauelemente, Balanstrasse 73, 8000 Munich 80 Germany.Google Scholar
  50. Shiraki, S.F. (1978), Electronic Design, 15, 86.Google Scholar
  51. Shiraki, S.F.(198 ) Proc. Powercon 7, J4, 1.Google Scholar
  52. Sibille, R. (1981), IEEE Trans. Magnetics, Mag. 22 #5, Nov. 1981, 3274.CrossRefGoogle Scholar
  53. Sibille, R. (1982), and Beuzelin, P., Power Conversion International, 1982, 46.Google Scholar
  54. Smith, S.(1983), Magnetic Components, Van Nostrand Reinhold, New York.Google Scholar
  55. Smith, S. (1983a) Power Conversion International, May 1983, 22.Google Scholar
  56. Snelling E.(1988) Soft Ferrites, Properties and Applications Butterworths, London.Google Scholar
  57. Snelling, E(1989) presented at ICF5.Google Scholar
  58. Stijntjes, T.G.W.(1985), and Roelofsma, J.J., Advances in Ceramics, Vol 16, 493.Google Scholar
  59. Stijntjes, T.G.W.(1989) Presented at ICF5, Paper Cl-01.Google Scholar
  60. TDK (1988) Catalog BLE-001F, June 1988, TDK, 13-1 Nihonbashi, Chuo-ku, Tokyo, 103, Japan.Google Scholar
  61. Thomson (1988) Soft Ferrites Catalog, Thomson LCC, Courbeville, Cedex, France.Google Scholar
  62. VDE Document 0806.Google Scholar
  63. Watson, J.K.(1980) Applications of Magnetism, John Wiley and Sons, New York.Google Scholar
  64. Watson, J.K.(1986) IEEE Trans Magnetics.Google Scholar
  65. Wood, P. (1981) Switching Power Converters, Van Nostrand Reinhold, New York.Google Scholar
  66. Zenger, M. (1984), Proceedings, Powercon 11(1984).Google Scholar

Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Alex Goldman
    • 1
  1. 1.Ferrite Technology WorldwideSingapore

Personalised recommendations