Bibliography
Bozorth, R. M. 1951. Ferromagnetism. Princeton, N. J.: D. Van Nostrand Co., Ltd. Bradley, F. N. 1971. Materialsfor Magnetic Functions. New York: Hayden Book Co.,
Inc. Brailsford, F. 1951. Magnetic Materials. London: Methuen and Co., Ltd. Brailsford, F. 1966. Physical Principles of Magnetism. London: D. Van Nostrand Co.,
Ltd. Chikazumi, S. 1964. Physics of Magnetism. New York: John Wiley and Sons. DeMaw, M. F. 1981. Core Design and Application Handbook. Englewood Cliffs, N.J.:
Prentice-Hall, Inc., Goldman, A. 1988. "Magnetic Ceramics." In Electronic Ceramics, ed. Lionel M. Lev
inson, pp. 147-189. New York: Marcel Dekker, Inc. Grossner, N. 1983. Transformers for Electronic Circuits. New York: McGraw-Hill Book
Co. Heck, C. 1974. Magnetic Materials and Their Applications. New York: Crane-Russack
and Co. Hoshino, Y., lida, S., and Sugimoto, M. 1971. F errites: Proceedings of the International
Conference. Tokyo: University of Tokyo Press. Hnatek, E. R. 1974. Design of Solid State Power Supplies. New York: Van Nostrand
Reinhold. Kampczyk, V. W., and Roess, E. 1978. Ferrite Cores (Ferritkerne). Berlin: Siemens
AG. Kittel, C. 1971. Introduction to Solid State Physics. New York: John Wiley and Sons. McLyman, C. T. W. 1982. Magnetic Core Selection for Transformers and Inductors.
New York: Marcel Dekker, Inc. Magnetic Materials Producers' Association. 1989. Soft Ferrites: A User's Guide. Ev
anston, Ill.: Magnetic Materials Producers Association. Magnetics, Division of Spang and Co. 1989. Ferrite Cores: Catalog FC509. Butler,
Penn.: Magnetics, Division of Spang and Co. Mallinson, J. C. 1989. The Foundations of Magnetic Recording. San Diego: Academic
Press. Morrish, A. H. 1965. The PhYSical Principles of Magnetism. New York: John Wiley
and Sons. Olsen, F. 1966. Applied Magnetism. Eindhoven: Philips Technical Library.
266 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
Onoda, G. Y., and Hench, L. L. 1978. Ceramic Processes Before Firing. New York: John Wiley and Sons.
Palmer, H., Davis, R. F., and Hare, T. M. 1977. Processing of Crystalline Ceramics. Material Science Research, Vol 2. New York: Plenum Press.
Parker, R. J., and Studders, R. J. 1962. Permanent Magnets and Their Application. New York: John Wiley and Sons.
Philips Electronics Co. 1986. Components and Materials: Book C-5. Eindhoven: Philips Electronics and Materials Division.
Polydorf, W. J. 1960. High Frequeru:y Magnetic Materials. New York: John Wiley and Sons.
Quartly, C. J. Square Loop Ferrite Circuitry. London: Iliffe Books, Ud. Rado, G., and Subl, H. 1963. Magnetism, Vol. Ill. New York: Academic Press. Reed, 1. S. 1988. Inr;oduction to the Principles of Ceramic Processing. New York: John
Wiley and Sons. Richards, C. E., and Lynch, A. C. 1953. Soft Magnetic Materialsfor Telecommunica
tions. London: Pergamon Press, Ltd. Roddam, T. 1963. Transistor Inverters and Converters. New York: Van Nostrand Rein
hold. Schieber, M. M. 1967. Experimental Magnetochemistry. Amsterdam: North-Holland
Publishing Co. Siemens AG. 1990-199]. Ferrill'S: DalO Book. Munich: Siemens AG. Smit, J. and Wijn, H. P. 1. ]959. Ferrill'S. New York: John Wiley and Sons. Smilh, S. 1985. Magnetic Components. Design and Applications. New York: Van Nos
lrand Reinhold. Snelling, E. C. 1988. Soft Ferrill'S, Properties and Applications. 2nd ed. London: But
terworths. Snelling, E. C .. and Giles. 1983. Ferrites for Inductors and Transformers. Letchworth:
Research Studies Press, Ltd. Soohoo, R. 1960. Theory and Application of Ferrites. Englewood Cliffs: Prentice-Hall.
Inc. Srivastava, M., and Patni, M. J. ]989. Advances in Ferrites: Proceedings of the Fifth
International Confeunce. Vol. 1. New Delhi: Oxford and IBH Publishing Co. PVT. Srivastava, M., and Patni, M. J. 1989. Advance.f in Ferrite.f: Proceedings of the Fifth
International COIiference. Vol. 2. Switzerland: Trans-Tech Publications. Standley. K. J. 1962. Oxide Magnetic Materials. London: Oxford University Press. TDK Corporation. 1987. TDK Ferrite Cores for Power Supplies and EMIIRFI Filter.
Tokyo: TDK Corporation. Tebble. R. S .• and Craik. D. J. 1969. Magnetic MQ/erials. London: Wiley Interscience. Thompson. J. E. 1968. The Magnetic Properties of Materials. Cleveland: CRC Press. Thomson LCe. 1988. Soft Ferrites. Book J. Courbevoie: Thomson LCC. Von Aulock, W. H. 1965. Handbook of Microwave Ferrill'S. New York: Academic Press. Wang, F. F. Y. 1985. Advances in Ceramics_ Vol. 15: Fourth International Conference
on Ferrites--Part 1. Columbus, Ohio: American Ceramic Society. Wang, F. F. Y. 1985. Advances in Ceramics. Vol. 16: Fourth International Conference
on Ferrites--Part 2. Columbus, Ohio: American Ceramic Society.
BmLIOGRAPHY
Watanabe, H., lida, S., and Sugimoto, M. 1981. Ferrites, Proceedings of the ICF3. Tokyo: Center for Academic Publications.
Watson, J. K. 1980. Applications of Magnetism. New York: John Wiley and Sons. Wohlfarth, E. P. 1980. Ferromagnetic Materials, Vol. 2. Amsterdam: North-Holland
Publishing Co. Wood, P. 1981. Switching Power Converters. New York: Van Nostrand Reinhold.
267
APPENDIX 1 ABBREVIATIONS AND SYMBOLS
A Cross-sectional area, cm2
A Attenuation or insertion loss, dB A Atomic weight A Angstrom units (1O-S m) AL Inductance factor (inductance per 1000 turns), mH At. Area of core, cm2
Aw Area of wire, cm2 or circ. mils Ap Area product, cm4
A~ Effective area, cm2 Ag Cross-sectional area of gap Am Cross-sectional area of magnet ao Unit cell length, A a Distance between atoms, A a Anomalous loss coefficient AC Alternating current B Magnetic induction, gausses or teslas (weberslm2) B. Saturation induction B, Remanent induction Bm Maximum induction or induction in magnet B II Induction in gap t1B Change in induction B~ Effective flux density C Centigrade temperature C Capacitance (farads) C Curie constant C Current-carrying capacity c Speed of light (3 x 1010 cmls) DA Disaccommodation DF Disaccommodation factor DC Direct current
270 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
d Thickness, cm d Density (g/cml) do Outer diameter di Inner diamter d Grain diameter, microns E Voltage, volts E Energy, ergs Ep Magnetostatic energy, ergs/cml EI: Anisotropy energy, ergs/cml E", Wall energy, ergs/cm2 E/ Energy stored in an inductor, ergs/cml EOUI Output voltage Em Input voltage e Charge on an electron, coulombs e Efficiency e Eddy current coefficient (Legg) F Force, dynes F Farads (capacitance) Fw Winding factor F .... Copper factor J Frequency, hertz Jr Resonant frequency, Hz t:.j Bandwidth, Hz JandF Leakage factors, magnets G Gravitational constant g Spectroscopic splitting factor H Magnetic field strength, oersted or Aim Hd Demagnetizing field H", Magnetic field in magnet H, Magnetic field in gap He Coercive force, oersteds or Aim Hei Intrinsic coercive force Hz Hertz, frequency 4H Linewidth, oersted WI: Spinwave linewidth, oersted h Planck's Constant hem Critical current (microwave power) h Hysteresis coefficient (Legg) I Current, amperes Ip Pulse current J Current density, Alcm2 j Unit imaginary vector
APPENDIX 1 271 ABBREVIATIONS AND SYMBOLS
K Absolute temperature, Kelvin K Constant K Copper~fill factor Kit K2 First and second anisotropy constants Kw Winding utilization factor (McLyman) Kj Current density factor Kg Geometrical factor K .. Electrical factor k Boltzman constant L Torque L Inductance, henries LN Inductance for N turns Lp PataUel inductance Lp Pulse inductance Ls Series inductance LF Loss factor I Distance between poles I", Magnetic path length, cm I .. Effective path length, cm Ig Length of gap M Intensity of magnetization, emu/cm3
Ms Saturation magnetization MOO Mega gauss-oersteds m Pole strength m Mass of an electron m Exponent of frequency in modified Steinmetz equation N Number of turns N Demagnetizing factor Np Turns in primary winding N. Turns in secondary winding n Number of unpaired electrons in an atom or ion n Exponent of B in modified Steinmetz equation Oe Oersteds, field strength Pa Pascals P Power, watts Po Output power PI Input power P, Apparent power P, Total loss, watts Pc Core loss, watts P", Winding loss, watts PhYIl Hysteresis losses
272 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
P e Eddy current losses Pr Residual losses p~ Oxygen partial pressure p Total angular momentum of an electron p Porosity Q Quality factor-in a series inductance, Q = XURs
q Electric charge in coulombs R Resistance, ohms R. Series resistance Rp Parallel resistance R Reluctance, magnets R", Thennal resistance r Distance between masses or charges s Skin depth T Temperature, degrees Kelvin or centigrade T c Curie temperature TN Neel temperature TC Temperature coefficient TF Temperature factor T Pulse width
Time. seconds t •• 12 Specific times ton On time of a transistor toff Off time of a transistor V Volume, cm3
V m Volume of a magnet Ve Effective volume Wa Window area, cm3
XL Inductive reactance, ohms Xc Capacitive reactance, ohms Z Impedance, ohms
a Regulation, % at. a2... Direction cosines a Angle between H and M 'Y Gyromagnetic ratio a Thickness of domain wall a Oxygen parameter (Tanaka) E Pha.~ angle between the direction of magnetization on the surface
and at a depth in material d Change in a unit 1) Efficiency
APPENDIX 1 273 ABBREVIATIONS AND SYMBOLS
a Angle in degrees a Angle between a magnetic field and the axis of a magnet a Angle between the magnetization and the easy direction of
magnetization a Temperature rise in a power material, degrees ac Curie temperature aN Neel temperature " Magnetostriction constant "s Saturation magnetostriction "100 Magnetostriction in a cube edge direction "III Magnetostriction in a cube body diagonal direction X. Wavelength, meters IL Microns, 10-6 m IL Magnetic moment ILB Bohr magneton ILo Permeability of free space IL Permeability ILo Initial permeability fJ.e Effective permeability IL" Amplitude permeability ILp Pulse permeability fJ.oc DC permeability IL' Real permeability fJ." Imaginary part of penneability IL + Clockwise rotating part of permeability of a circularly polarized
electronmagnetic wave IL- Counterclockwise part of permeability of above ILIDP Maximum permeability p Resistivity, ohm-cm 0' Applied stress 0' Magnetic moment per unit weight. emu/g T Pulse width, seconds ~ Magnetic flux, maxwells or webers X Magnetic susceptibility CIl Angular velocity, radiansls
APPENDIX 2 ADDRESSES- MAJOR SUPPLIERS OF POWER
ELECTRONICS COMPONENTS
Material Code F = Ferrite Material S = Metal Strip Material A = Amorphous Metal Material P = Metal Powder Core Material N = Nanocrystalline Material
NORTH AMERICA UNITED STATES
Allegheny-Ludlum Steel Corp. 500 Six PPG Place Pittsburgh, Pennsylvania, 15222
The Arnold Engineering Co. 300 N. West St. Marengo, IL 60152
A VX, A Kyocera Group Myrtle Beach SC
Epcos, Inc. 186 Wood Ave. S. Iselin, NJ 08830
Ceramic Magnetics 16 Law Drive Fairfield, NJ 07004
Fair-Rite Products Corp. P.O. Box J, One Commercial Row Wallkill, NY 12589
FerriShield 350 Fifth Ave. #7310 New York, NY 10118
Ferronics, Inc. 45 O'Connor Road Fairport, NY 14450
S
S, A, P
F
F
F
F
F,S,P
F
276 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
Hitachi Metals, America 2400 Westchester Ave. Purchase, NY 10577 Iskra Electronics 155 Dupont St. Plainview NY 11803
Metglas Division Honeywell Inc. 101 Columbia Rd. P.O. Box 1057 Morristown, NJ 07962
Magnetec GmbH Industriestrasse 7 0-63505 Langensebold, Germany
Magnetics, Div. of Spang & Co. P.O. Box 391 Butler PA 16003-0391
Micrometals 5615 E. LaPalma Ave. Anaheim, CA 92807
National Magnetics Group Inc 1210 Win Dr. Bethlehem P A 18017
MMG North America 126 Pennsylvania Ave. Patterson, NJ 07503-2512
Philips Ferrite Components Roswell, GA
Steward 1200 E. 36th Street P.O. Box 510 Chattanooga, TN 37401-0510
TDK of America 1600 Feehanville Dr. Mt. Pleasant, IL 60056
S,A,F
F
A
N
S,A,F,P
P
F
F
F
F
F,A
ADDRESSES- MAGNETIC COMPONENT SUPPLIERS 277
Tokin America 155 Nicholson Lane San Jose, CA 95134
TSC Ferrite International TSC Arnold Technologies 39105 N. Magnetics Blvd. P.O. Box 399 Wadsworth IL 60083
TSC Pyroferric 507 Madison St. Toledo, IL 62489-0159
Coremaster International, Inc 180 South 300 West #120 Salt Lake City, Utah 84101 Mexico
TDK de Mexico S.A. de C.V. Carr, Juarez Porvenir Parque Ind. AJ Bermudez, iCD Juarez, Chin. Mexico
Canada
Neosid, Canada, Ltd. 10 Vansco Rd. Toronto Ont. M8Z SJ4, Canada
South America
TDK DO Brasil Ind. E. Com Ltda Alameda Campinas 433 Conj. 1111112 Jardim Paulista CEP 01404-000 Sao Paulo, SP, Brazil
Asian Countries
Korea
F
F S
P
A,N.
F
F,P
F
278 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
TDKKorea 5th Fl. Sindo Bldg. 943-27 Daechi-dong Kangnam-ku Seoul, Republic of Korea
Samwha Electronics Co. Ltd. 142 Nonhyun-dong, Gangnam-ku Seoul, Korea
Isu Ceramics Co. C.P.O. Box 5680 Seoul, Korea
F
F
F
Korea Ferrite Co. F 301, Dongjin Bldg. 218 2-ka Hankang-ro, Y ongsan-ku Seoul, Korea
India Cosmo F errites Ltd F 30Community Centre, Saket New Delhi, 11017, India
Hilversum Electronics F Murugappa Electronics 29 II St. , Kamaraj Ave. Adyar, Madra, India
DGP Hinoday Industries Ltd. F Bhosai Industrial Est. Pune,411026, India
International Ferrites Ltd.(an Epcos Co.) F LB2, Sector III Salt Lake, Calcutta, 700091. India
Neosid (India) PVT Ltd. F. P 144 Seevaram, Thoralpakkam Chennai 600-096, India
Japan
FDKCorp. 6-1-11 Shinbashi,Minato-ku Tokyo, 105 Japan
F
ADDRESSES- MAGNETIC COMPONENT SUPPLIERS 279
Tokin Corp. Hazama Bldg. 5-8 Kita-Aoyama 2-chome Minato-ku Tokyo, 107, Japan
TDKCorp. 13-1 Nihonbashi l-chome Tokyo 103-8272, Japan
Mitsubishi Electric Corp. 2-2 Marunouchi 2-chome Chiyoda-ku Tokyo, Japan
Hitachi Metals Co. 2-1-2 Maunouchi, Chiyoda-ku Tokyo, Japan
Murata Mfg. Co. ,Ltd. 26-10 Tenjin 2-chome Nagaoka,kyo-shi Kyoto,617, Japan
Nippon Ferrite Co 1-25-1 Hyakunincho,Shinjuku-ku Tokyo, 160, Japan
Sony Corp. 7-35 Kitashinagawa 6-chome Tokyo, 11, Japan
Sumitomo Special Metals Co. 22, Kitahama 5-chome, Higashi-ku Osaka,541, Japan
Taiyo Yuden 2-12 Ueno l-chome Taitoh-ku Tokyo, 112, Japan
Tomita Electric Ltd. 123 Saiwai Tottori-shi Tottori-ken 680, Japan
F,P
F,A
F
F,A
F
F
F
S,F
F
F
280 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
Peoples Republic of China
Southwest Institute of Applied Magnetics F P.O. Box 105, Mianyang Sichuan China
Zhejiang Tiantong Electronics Co. Ltd F 11 Jianshe Rd. Guodian Town, Haining Zhejiang, China
Hangzhou Linan Citong F Magnetic Components Co. 3 Block, Government Administration Bureau 2# , Baoshi 1 st Road, Hanzhou Zheijiang, China
Hebei LC Electric Co. Ltd. F No.8, Yucai, Laishui Hubei, 074100, China
Yuxiang Magnetic Materials Inc. F 16Fl Jinyuan Bldg. No.57 Hubin S. Road Xiamen, China
Jiangmen City Powder Metallurgy Factory Ltd. F 8 Longwan Road, Jiangmen Guangdong, China
Singapore
Taiyo Yuden (Singapore) PTE, Ltd. 9Joo Koon Rd. Jurong Town Singapore
Taiwan
Philips Electronic Industries Ltd. San Ming Bldg., 4th Floor 57-1 Chung Shan N. Rd.Sec.2 Taipei, Taiwan
Super Electronics Co., Ltd
F
F
F
ADDRESSES- MAGNETIC COMPONENT SUPPLIERS 281
726, Chung Shan N. Rd. Taipei Taiwan TDK Electronics (Taiwan) Corp. 159 Sec. 1, Chung Shan Rd. Tatung Li, Yangmei Taoyuan, Taiwan
Yeng Tat Electronics Co. Ltd P.O. Box 2-30 Shu-lin(238) Taipei Hsien, Taiwan
Europe
United Kingdom
Salford Electrical Instruments Times Mills Heywood Lancashire OLtO 4N#, U.K.
Almag Ltd. 17 Broomhills Rayne Rd. Braintree, Essex, CM7 2Rg U.K.
Neosid Ltd. Edward House, Brownfields Welwyn Garden City Herfordshire, AL 7 IAN, u.K.
France
A VX-Thomson50 Rue J-P Timbaud BP 13/92403 Courbevoie, Cedex, France
Czechoslavakia
Pramet Unecowska 2 787 53, Sumperk, Czechoslavakia
Germany
Kaschke KG GmbH and Co
F,A
F
F,P
F,P
F,P
F
F
F
282 MAGNETIC COMPONENTS FOR POWER ELECTRONICS
P.O. Box 2542 D-37015 Gottingen, Germany
Epcos AG Postfach 80 170981617 Munich Germany
Vacuumschmelze GmbH Gruner Weg 37 P.O. Box 2253 D-6450 Hanau 1, Germany
Vogt Electronic AG D-94130,Obernzell, Germany
Netherlands
N.V. Philips Gloeilampenfabriken Commercial Department Materials Bldg. BE-4 Eindhoven, The Netherlands
Poland
Polfer Zaklad Materialow Magtczynch Warsaw-47 Poland
Yugoslavia
Iskra F eriti Stegne 29 61000 Ljubljana, Slovenia
F
S,A, N
F,C
F,P
F
F
APPENDIX 3 UNITS CONVERSION FROM CGS TO MKS (SI) SYSTEM
To convert from Multiply by Symbol Quantity CGS Units MKS Units Factor
I Length cm m 10-2
m Mass g Kg 10-3
F Force dyne N, Newton lO-s
EorW Energy, Work erg Joule 10-7
H Magnetic Field Oersteds AIm 79.58 Strength
B Magnetic Gausses Teslas(Wb/m2) l~ Induction or (Maxwelllcm2) (volt-s) Flux Density
cI> Magnetic Flux Maxwells Webers(Wb) 10-8
J1 Permeability Unitless Henries/m 4 x 1<r7
F Magnetomotive Gilberts Amp-turns .7958 Force
(BH)max Maximum Gauss-Oersteds Joules/m3 7.96 x 1<r3
Energy (ergs) Product
Other quantities which are the same in both systems and their common units include: Power, P (Walts, W); Charge, q (Coulombs); Potential, E or V (Volts); Time (Seconds); Resistance, R (ohms); Capacitance, C (Farads); Current, I (Ampen:s); Indoctance, L (Henries).
Subject Index
Air gap, 41 Amorphous metal alloy, 26,35-6,38,42-
43,47,51-2,76,79-85,90-1,171-3 Amplitude permeability ,32-3,55,58 Area product, 128-31
Beads, ferrite, 49 Bias, D.C.,157 Bipolar drive, 11-13 Boost Converter, 6-7 Buck Converter,5-7
Choke, swinging, See Power Inductor Cobalt-iron alloy, 35 Coercive force, 69 Common-mode chokes,25,52,70-1 Competitive materials, 38 Complex Permeability,61-2 Computer-aided design, 255 Conversion Ratio,7 Converters, 2, 34 Core losses, 30-1,34,56,64-7 Core-loss limited design, 136-7 Cost, transformer,37 Creepage, 142-4 Curie temperature,67-8 Cut cores,44
Design, converters, 161-4 Design, power inductors, 151-61,164-5
Amorphous, 168-71 Nanocrystalline,173-9
Density,69 Dimensional Resonance, 144-5
E-cores, 108-9 E-C cores,109-111 EFD cores,113,115,158 ETD cores, 110 EP cores,III-2 E-R cores,111
Eddy current losses, 30-1,66,148-150 Effective Permeability, I 14-6 EMI Applications,25,49-52,71-6
Faraday equation, 28-9,128 Ferrites,26,42,55-76 Ferromagnetic resonance, 61 Ferroresonant transformers, 15,18-9,46,150-1 Filters, 5 Flux density, See Induction F1yback transformers, 3,8-11,14,156 Formability ,38-9 Forward converters, 3,8-11,14 Frequency-Voltage, 28-9 Frequency-Losses,30-32 Gapped cores, 116 Gapped inductors,43,70
Hanna curves, 151-6 Hi-Flux cores,42,44-5 High permeability alloys,46 Hiperco, See Cobalt iron alloys Hysteresis loops, 11,13-5 Hysteresis losses,148
IEC publications, 260-4 IGBT,I,3 Impedance, 398, 401-402, 405 Inductance, 361-362 Inductance Factor, 1 16 Induction, 50 Inductors, 6,17,25,41-5,151-9 Initial permeability ,55,57-8 Integrated magnetics, 124,152 Inverters, 1 Iron powder cores, 93-96
Kg Method, 1 55,168-71
Loss mctor,72 Low profile ferrite cores, 119-20
Manganese zinc ferrite,31-2,40,55,57,59,61, 67-9,73-4
Magnetic amplifier,I,25,46-7,161
Maximum permeability,59 Metallic magnetic materials, 26,35,76,77-8,125 Metal powder cores,91,93-102 Moly-perm powder cores,97-9 MOSFETS,I,3
Nanocrystalline materials, 26,36-8,42,51-2,86-92,173-9
Nickel-zinc ferrites,31-2,57,61 Nickel-iron alloys, 36
Orthogonal windng,118 Output Power,66,139,-40
Performance Factor,38-9,66,68 Permeability, 55-9,76 Permalloy,46 Planar technology, 119 Powder cores, 26,42,93-125 Pot cores,105-6 Power Factor Correction,2,25,45-6 Power ferrites, 27-34,55-76 Power Inductors,25,69,151-2 Power supplies, 13-7 Power Transformers,25,-8,32-3,41-2 PQ cores, 112 Prepolarized cores, 117 Pulse transformers,25,48-50 Pulse width modulation, 9,16 Push-pull converters,3,8,10-1,15
286 INDEX
Recti fiers, 1 ,3 Regulation, 132-4 Regulation-limited transformer, 135 Remanence, 69 Resistance,71 Resistivity, 30-1,68 Resonant Converters,15, 19-20 Ripple current, 172 RM cores, 107-8
Saturation induction, 30,56,61 Saturation-limited design, 135-6 Saturation magnetization, 61-3 Secondary Permeability Maximum,33 Sendust,42,44,100-2 Shapes, ferrite,33,105-26, Snoeks's limit, 75 Soft Switching,19-22 Squareness ratio, 69 Stress, effect of, 74 Supermalloy,78 Supermendur, See CoFe alloys Surfuce-mount design, 119--23 Swinging Choke,160-1 Switched-mode power supplies, 13-73467 Switching regulator, I 52-55,165,1 67 ' ,
Telecommunications applications, 2 Television applications, 28 Temperature coefficient, 59-61 Temperature rise,62-3 Thermal resistance, 138-9,141,144-5 Toroids. 112,114 Topologies,I-22 Transformer, See Power Transformer
Unipolar drive, 11-13 Units, conversion, See Appendix 3 UPS,2 Useable Flux Density,39-40 Vendors catalogs, 138 Very high frequency operation, 147-50
Waveforms,4 Winding, 14-7 Winding-loss limited design, I 34-5
Zero Current Switching, I 9-21 Zero Voltage Switching, I 9,-20,22
Suppliers Index Ferrites Acme, I 97-8,226 AVX(Thomson)141,193,216-7 Ceramic Magnetics, I 96,223 Cosmo, 197,225 Domen, 196-7,220 Epcos,(Siemens),111-2,122,138-41,185-90,
192,209-11 Fair-Rite,73-5,153,192,202-3 FDK,193,213-5 Ferrite Int'l, I 95,223 Ferronics,192,213 Heiber,198,228 Hinoday,198,227 Hitachi, 197,222-3 Iskra, 196,22 I Isu,198,225 Kaschke,194,2 I 7-8 Magnetics,59, 108-110,
113-4,154,157,189,191,201-2 Mianyang,197,227 MMG (Neosid) I 93-4,204 Philips, 120, 138, 158, 182, 185,205-8 Samwha, 194-5,224 Steward, I 95,2 12 TDK,142,181-3,200-1 Tokin,191-2,203-4 Tomita,196,219 Vogt,194,217-8,220-1
Metal Strip A1lied(See Honeywell) Arnold,228,23 1-33 CoreMaster,229,236 Honeywell,83-4,228 Magnetec,23 7-40 Magnetics, 77 -8,228,230, TDK,229,245 Toshiba,91,229,234-6 Vacuumschmelze,91-2,229,245
Powder Cores Amold,229,241-4 Magnetics,97 -102,229 Micrometals,94-6,229,246 Pyroferric,96,229,247-9