ASTM_A_1009_-_05_2010.pdf

Designation:A100905(Reapproved 2010)Standard Specification forSoft Magnetic MnZn Ferrite Core Materials for HighFrequency(10 kHz-1 MHz)Power Transformer and FilterInductor Applications1This standard is issued under the fixed designation A1009;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the requirements to which thespecified grades of soft magnetic manganese zinc(MnZn)ferrite materials shall conform.Cores made from these mate-rials are used primarily in power transformers and filterinductors.1.2 The values stated in customary(cgs-emu and inch-pounds)units are to be regarded as standard.The values givenin parentheses are mathematical conversions to SI units,whichare provided for information only and are not consideredstandard.2.Referenced Documents2.1 ASTM Standards:2A340 Terminology of Symbols and Definitions Relating toMagnetic TestingA1013 Test Method for High-Frequency(10 kHz-1 MHz)Core Loss of Soft Magnetic Core Components at Con-trolled Temperatures Using the Voltmeter-Ammeter-Wattmeter Method3.Terminology3.1 The terms and symbols used in this specification aredefined in Terminology A340.3.2 Definitions of Terms Specific to This Standard:3.2.1 Inductance Index(AL value)the self inductance perwinding turn squared(L/N2)expressed in units of nanohenriesper turns squared(nH/N2).where:n=nano=109,nH=inductance in nanohenries,andN=number of turns on winding(example:0.005 H with a100 turn coil=0.005/(100)2H/N2=500 nH/N2).3.2.2 Mated Core SetTwo or more core segments as-sembled with the magnetic flux path perpendicular to themating surface.3.2.3 Air core inductance,Lair,is the inductance of a corewith the same magnetic path length and cross-sectional corearea but with the relative permeability of air.3.2.3.1 Customary UnitsLair54PAN21029/l1,Hwhere:N=number of turns on winding;A=cross-sectional area of core specimen,cm2;andl1=effective magnetic path length,cm.3.2.3.2 SI UnitsLair54PAN21027/l1,Hwhere:N=number of turns on winding;A=cross-sectional area of core specimen,m2;andl1=effective magnetic path length,m.4.Classification4.1 The soft magnetic MnZn ferrite material-type designa-tions for power transformer and filter inductor materialscovered by this specification are listed in Table 1,Table 2,andTable X1.1.The prefix of the type designations identifies eachmaterials intended use.Power transformer materials are de-noted with the prefix P and filter materials are denoted with theprefix F.4.2 The first and second digits of the type designations for apower transformer material identify the typical core lossdensity of the material in mW/cm3,and the remainder of thetype designation identifies the temperatures in C in which thecore material must not exceed the maximum core loss density.4.3 The last four digits of the type designations for filtermaterials identify the typical relative inductance permeability.1This specification is under the jurisdiction of ASTM Committee A06 onMagnetic Propertiesand is the direct responsibility of Subcommittee A06.02 onMaterial Specifications.Current edition approved Nov.1,2010.Published December 2010.Originallyapproved in 2000.Last previous edition approved in 2005 as A1009 05.DOI:10.1520/A1009-05R10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Ordering Information5.1 Orders for material under this specification shall includesuch of the following information as is required to describe thematerial adequately.5.1.1 ASTM specification number including year of issue orrevision.5.1.2 ASTM soft magnetic MnZn ferrite material-type des-ignation.5.1.3 Core shape,size,dimensions,and dimensional toler-ances.5.1.4 Whether the core is to be purchased with or without agap.5.1.4.1 The Inductance Index(AL value)or the mechanicalgap depth.5.1.4.2 If the mated core set is ordered gapped by anInductance Index(AL value),the purchaser must specifywhether the mated core set consists of a gapped core half matedwith an ungapped core half or if both core halves are equallygapped.5.1.4.3 If the mated core set is ordered gapped by anInductance Index(AL value),the purchaser must supply theproducer with a test coil and the testing conditions(circuitmode,turns on coil,frequency,and flux density).5.1.4.4 The tolerance of either the Inductance Index(ALvalue)or the mechanical gap depth.5.1.5 Quantity in pieces.5.1.6 Exceptions to the specification or special require-ments.6.Magnetic Properties6.1 The size of a soft magnetic MnZn ferrite powe