IEC 62317-8:2006 pdf download – Ferrite cores – Dimensions – Part 8: E-cores
1Scope
This part of lEC 62317 specifies the dimensions that are of importance for mechanicalinterchangeability for Ecores with rectangular cross-section made of ferrite，the dimensionsof coil formers to be used with them, and the effective parameter values to be used incalculations involving them.
The selecting core sizes to this standard is based on the philosophy of including those sizes,which are industrial standards，either by inclusion in national standards,or by broad-baseduse in industry.See lEC 62317-1 for more detail concerning the philosophy of selecting coresizes to be included.
NOTE Cores covered by this standard are intended for general applications at both low and high flux densities,but they also find uses in special applications such as pulse transformers. They are generally used in pairs.
Whilst the main application of this standard is expected to be for ferrite cores, its validity for iron powder coresshould not be overlooked.
Coil formers are not specified for E-cores smaller than E 8/2, which are also used in SMD assemblies.
The use of “derived”standards, which give a more detailed specification of component partswhilst still permitting compliance with this standard, is discussed in Annex A.
2 Normative references
The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
IEC 60205:2006,Calculation of the effective parameters of magnetic piece partsPrimary standards
Compliance with the following requirements ensures mechanical interchangeability ofcomplete assemblies and coil formers.
3.1 Dimensions of E-cores with rectangular cross-section
3.1.1 Main dimensions
The main dimensions of E-cores with rectangular cross-section shall be as given in Table 1.NOTEThe dimensions of the cores may be checked by means of gauges,an example of which is given in AnnexB. In order to facilitate production it may be necessary to use gauges having dimensions differing from those givenin Annex B, although no relaxation of the requirements for the dimensions of the cores given in Table 1 is therebypermitted.
3.1.2Effective parameter and Amin values
The effective parameter and Amin values of a pair of cores whose dimensions comply with3.1.1 shall be as given in Table 2 (see lEc 60205, for the definitions of these parameters andtheir calculation; and 2.2 of lEC 60205, for the definition of Amin)
