IEC 62211:2017 pdf download

IEC 62211:2017 pdf download.Inductive components – Reliability management
1 Scope
This document is applicable to inductive components (chokes and transformers) based on magnetically soft materials. These are components based especially on laminated iron sheets, iron powder materials (including alloys), as well as ferrites and amorphous or crystalline metal band cores. Winding assemblies mean wire winding assemblies as well as multilayer and stacking technologies of planar technology including coils based on non-magnetic materials. Discrete type components and the different types of surface mount inductive components (SMD) are also considered in this document. The reliability of assemblies of inductive components based on several technologies such as glued types, types with clamps (clips), impregnated (varnished) types as well as (vacuum) potted types can also be checked with this document. The subsequent determinations can be applied either for the primary qualification of inductive components or for all manners of requalification examinations (design, process, change of production facility). They can also be applied for the monitoring of products out of actual manufacturing processes. This document sets up a broad basis of electric and mechanical criteria of failure test procedures. If manufacturers advertise compliance with this standard in their data sheets, customers can request data to demonstrate compliance with this standard. The customers can also request the product to be in compliance with this standard by a recognised body. Customers and manufacturers can elect to perform additional testing and acceptance criteria different than those defined in this standard.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp 3.1 reliability <inductive component> component level reliability of the inductive component in the customer’s electrical circuit application 3.2 reliability tests <component level> sequence of tests performed on an individual component, each specific test being designed to represent conditions under which the component is expected to operate in end applications Note 1 to entry: Categories of test levels are organised to be consistent for typical applications. 3.3 reliability tests <system level> sequence of tests performed on a collection of components as arranged in a specific end application under working conditions 3.4 component family group of components characterised by the same common features, for example the same magnetic base material, the same core size and the same winding type
4 Component families
In a similar way to the qualification rules contained in IEC 61 248 (all parts), reliability tests can be performed on typical samples representing families of inductive components. A family of inductive components is defined on the basis of: • the same application class as specified in IEC 61 248 (all parts);This means that reliability tests for a family of unencapsulated, wire-wound PTH transformers on RM ferrite cores, for instance, can be carried out representatively on small and large size models (for example RM4 and RM1 4). Similar conclusions applied to the other sizes regarding reliability can be made, as long as one can prove that all materials used are the same in terms of their load characteristics. NOTE This applies in particular to the properties of the magnetic materials (NiZn-ferrite cannot be handled in the same way as, for example, MnZn-ferrite), the bobbin (plastic/shape), as well as other materials such as clips, bonding agents, spacers and insulating tapes.