【英文标准名称】:StandardTestMethodforAlternating-CurrentMagneticPropertiesofToroidalCoreSpecimensUsingtheVoltmeter-Ammeter-WattmeterMethod
【原文标准名称】:使用伏特计-电流计-瓦特计方法测试环形铁芯试样交流磁性能的标准试验方法
【标准号】:ASTMA927/A927M-2004
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:A06.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alternatingcurrent;core;coreloss;flatrolled;laminatedcore;lamination;magnetic;magneticmaterial;magnetictest;permeability
【摘要】:ThistestmethodisaderivativeofTestMethodA697/A697MspecificallydesignedfortestingoftoroidalcoreswhicharenotcoveredinTestMethodA697/A697Mandfortestingatmagneticfluxdensitiesabovethekneeofthemagnetizationcurve.Specimensizetypicallyrangesfrom1to1.25in.[25.4to31.8mm]ininsidediameterto1.5in.[38.1mm]inoutsidediameterwithweightsrangingfrom30to60g.Providedthetestequipmentissuitablychosen,thereisnoobviouslimittotheoverallsizeofcorethatcanbetested.Ifbasicmaterialpropertiesaredesired,thentherequirementsof5.1mustbeobserved.Thereproducibilityandrepeatabilityofthistestmethodaresuchthatthistestmethodissuitablefordesign,specificationacceptance,serviceevaluation,andresearchanddevelopment.Whentestingundersinusoidalfluxconditionsatmagneticfluxdensitiesapproachingsaturation,highlypeakedmagnetizingwaveformswillbepresent,andthetestinstrumentsusedmusthavecrestfactorcapabilitiesofatleast3;otherwiseerroneousresultswillbeobtained.1.1Thistestmethodcoversthedeterminationofseveralacmagneticpropertiesofeitherlaminatedringortoroidaltapewoundcoresmadefromflatrolledproduct.1.2Thistestmethodcoverstestequipmentandproceduresfordeterminationofspecificcoreloss,specificexcitingpower,andpeakpermeabilityforpowerandaudiofrequencies(50to20000Hz)undersinusoidalfluxconditions.1.3Thistestmethod,becauseoftheuseofafeedback-controlledpoweramplifier,iswellsuitedfordeterminationofacmagneticpropertiesatmagneticfluxdensitiesabovethekneeofthemagnetizationcurveandisparticularlyusefulfortestingofhigh-saturationiron-cobaltalloys(forexample,alloyslistedinSpecificationA801),althoughuseofthistestmethodisnotrestrictedtoaparticulartypeofmaterial.1.4ThistestmethodshallbeusedinconjunctionwithPracticeA34/A34MandTerminologyA340.1.5Thevaluesandequationsstatedincustomary(cgs-emuandinch-pound)orSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,SIunitsareshowninbracketsexceptforthesectionsconcerningcalculationswherethereareseparatesectionsfortherespectiveunitsystems.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H21
【国际标准分类号】:17_220_20
【页数】:5P.;A4
【正文语种】:英语


【英文标准名称】:StandardSpecificationforCelluloseAcetateButyrateMoldingandExtrusionCompounds
【原文标准名称】:乙酸丁酸纤维素模制与挤压化合物的标准规范
【标准号】:ASTMD707-1998
【标准状态】:作废
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:挤压;塑料制品;化合物;模制材料;塑料;建筑;纤维素乙酰丁内酯
【英文主题词】:celluloseacetobutyrate;plastics;compounds;extruding;mouldings(shapedsection);plasticsproducts;construction
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:83_140_99;83_080_20
【页数】:5P;A4
【正文语种】:英语