1、Designation: A 1009 05Standard 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 A 1009; the number immediately following the designation indicates the year
2、 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the requirements to which the
3、specified 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
4、parentheses are mathematical conversions to SI units, whichare provided for information only and are not consideredstandard.2. Referenced Documents2.1 ASTM Standards:2A 340 Terminology of Symbols and Definitions Relating toMagnetic TestingA 1013 Test Method for High Frequency (10 kHz 1 MHz)Core Loss
5、 of Soft Magnetic Core Components at Con-trolled Temperatures Using the Voltmeter-Ammeter-Waltmeter Method3. Terminology3.1 The terms and symbols used in this specification aredefined in Terminology A 340.3.2 Definitions of Terms Specific to This Standard:3.2.1 Inductance Index (AL value)the self in
6、ductance 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 witha 100 turn coil = 0.005/(100)2H/N2= 500 nH/N2).3.2.2 Mated Core SetTwo or more core segments
7、 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 UnitsLair5 4PAN2109/l1,Hwhere:N = number
8、of turns on winding;A = cross-sectional area of core specimen, cm2; andl1= effective magnetic path length, cm.3.2.3.2 SI UnitsLair5 4PAN2107/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
9、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 each1This specification is under the jurisdiction of ASTM Committee A06 onM
10、agnetic Properties and is the direct responsibility of Subcommittee A06.02 onMaterial Specifications.Current edition approved Nov. 1, 2005. Published December 2005. Originallyapproved in 2000. Last previous edition approved in 2000 as A 1009 00.2For referenced ASTM standards, visit the ASTM website,
11、 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.m
12、aterials 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 remain
13、der 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.5. Ordering Information5.1 Orders for materi
14、al 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 dim
15、ensional 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
16、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 fl
17、ux 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 power trans-former core for relatively hig
18、h frequencies (50 kHz) is oftenconstrained by the core loss at the operating temperature. Eachpower material type is identified by a maximum core lossdensity limit at the temperatures where the core loss density isintended to be below this maximum limit as shown in Table 1.6.2 The size of a soft mag
19、netic MnZn ferrite power trans-former core for relatively low frequencies (50 kHz) is oftenconstrained by the saturation flux density. The minimumsaturation flux density for each power material is shown inTable 1.6.3 The size of a soft magnetic MnZn ferrite filter inductorcore is often constrained b
20、y the Inductance Index (AL value)which is dependent on the material permeability. Each filtermaterial type is identified by its minimum and maximumrelative inductance permeability as shown in Table 2.7. Mechanical Properties7.1 Typical material constants for soft magnetic MnZnferrite materials are g
21、iven in Table X1.2 of Appendix X1.8. Dimensional Tolerances8.1 For sintered (unground) dimensions, the tolerances shallbe 62%.8.2 For machined heights, the tolerances shall be 60.005 in.(0.13 mm).8.3 For machined gap depths, the tolerances shall be60.0007 in. (0.017 mm).9. Workmanship, Finish and Ap
22、pearance9.1 All mating surfaces of the core shall be free of dirt orany other foreign material. Foreign material or surface crazingthat interfere mechanically or electrically are not allowed.9.2 The largest dimension of a chip, crack, pit, or surfacevoid must not exceed one third the smallest dimens
23、ion of thesurface under consideration.10. Test Methods10.1 Core losses are determined in accordance with theprocedure of Test Method A 1013.10.2 Flux densities are determined by calculating flux perunit core area from the integrated voltage measured on asecondary winding when the current through the
24、 primarywinding is set for the desired magnetizing field strength.10.3 Relative inductance permeability is determined bydividing the measured inductance by the air core inductance.L5 L/ LairTABLE 1 Power Transformer Material Type Designations andMagnetic RequirementsASTM PowerMaterialTypeMaximum Cor
25、e LossDensityASpecifiedTemperaturesThat CoreLoss DensityMust NotExceedMaximumMinimum Saturation FluxDensityBCustomaryUnits, mW/cm3SI Units,W/m3SI Units,CCustomaryUnits, GSI Units, TP5025-100 65 65 000 25-100 5000 0.5P5099 65 65 000 99 5000 0.5P7070 80 80 000 70 5000 0.5P7099 80 80 000 100 5000 0.5P8
26、040 90 90 000 40 5000 0.5ACore loss test conditions: 100 kHz, 1000 G (0.1 T) at temperature of minimumcore loss.BSaturation flux density test conditions: 1 kHz, 15 Oe (1200 A/m), at 25C.TABLE 2 Filter Inductor Material Type Designations andMagnetic RequirementsASTM FilterMaterial TypeMinimum Relativ
27、eInductance Permeability,ALMaximum RelativeInductance Permeability,ALF010K 7000 13 000F5000 3750 6 500F3000 2250 3 900ARelative inductance permeability test conditions: 100 kHz, 5 G (0.0005 T), at25C.A100905210.4 The inductance is typically measured using a digitalLCR meter or equivalent. Procedures
28、 described by the manu-facturer in the manuals of the LCR meter should be followed.See also 5.1.4.3.10.5 The size and shape of the test core specimen is of theproducers choice but must have uniform cross-sectional corearea throughout its magnetic path length and be ungapped.11. Lot Identification11.
29、1 The producer shall assign a lot identification code thatcan be used to identify the specific raw material lots, moldablepowder lot, kiln firing, and grinding lot.12. Material Certification Report12.1 When specified in the purchase order or contract, thepurchaser shall be furnished certification th
30、at samples repre-senting each lot have been either tested or inspected as directedin this specification and the requirements have been met. Whenspecified in the purchase order or contract, a report of the testresults shall be furnished.12.1.1 For power transformer materials, the producer shallinclud
31、e with each shipment a certified report of the core loss,sintered dimensions, and Inductance Index (AL value) or gaplength.12.1.2 For filter materials, the manufacturer shall includewith each shipment a certified report of the Inductance Index(AL value).12.2 The material certification report shall c
32、arry the lotidentification.13. Keywords13.1 core loss density; high frequency magnetic materials;MnZn; permeability; soft ferrite materialsAPPENDIX(Nonmandatory Information)X1. PROPERTIESASTM International takes no position respecting the validity of any patent rights asserted in connection with any
33、 item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical
34、committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at
35、 a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor D
36、rive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm
37、.org).TABLE X1.1 Typical Magnetic Properties for Power Transformer MaterialsASTM Power Material TypeTypical Core Loss Density at Temperature of Minimum Core LossATemperatures of Minimum Core LossCustomary Units, mW/cm3SI Units, W/m3SI Units, CPS025100 50 50 000 25100P5099 50 50 000 99P7070 70 70 000
38、 70P7099 70 70 000 100P8040 80 80 000 40ACore loss test conditions: 100 kHz, 1000 G (0.1 T) at temperature of minimum core loss.TABLE X1.2 Physical and Mechanical Properties for Soft Magnetic MnZn Ferrite Typical Material ConstantsCoefficient of linear expansion 10 x 106/CTensile strength 7 ksi (50 MPa)Compressive strength 60 ksi (410 MPa)Density 4.8 g/cm3(4800 kg/m3)A1009053
