IEC 63093-13 pdf free download
IEC 63093-13 pdf free download.Ferrite cores – Guidelines on dimensions and the limits of surface irregularities – Part 13: PQ-cores.
I Scope
This part of IEC 63093 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of P0-cores and low-profile P01-cores made of ferrite, and the locations of their terminal pins on a 2,54 mm printed wiring grid in relation to the base outlines of the cores. It also gives guidance on allowable limits of surface irregularities applicable to P0-cores in accordance with the relevant generic specification.
The selection of core sizes for this document is based on the philosophy of including those sizes which are industrial standards, either by inclusion in a national standard, or by broad-based use in industry.
This document is a specification useful in the negotiations between ferrite core manufacturers and customers about surface irregularities.
The general considerations that the design of this range of cores is based upon are given in Annex A.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60205, Calculation of the effective parameters of magnetic piece parts
IEC 60401-1, Terms and nomenclature for cores made of magnetically soft ferrites — Part 1:
Terms used for physical irregularities
IEC 60424-1, Ferrite cores — Guidelines on the limits of surface irregularities — Part 1:
General specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60401-1 and IEC 60424-1 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
4 Primary dimensions
4.1 General
Compliance with the following requirements ensures mechanical interchangeability of complete assemblies and wound coil formers.
4.2 Dimensions of PQ-cores
4.2.1 Principal dimensions
The principal dimensions of PQ-cores shall be as given in Table 1 and those of the low-profile P01-cores shall be as given in Table 2. See also Figure 1 and Figure 2. The dimensions of the cores may be checked by means of gauges. By way of example, a possible standard for these gauges is given in Annex C, although no relaxation of the requirements for the dimensions of the cores given in Table 1 and in Table 2 is permitted.
4.2.2 Effective parameter and ‘4mIn values
The effective parameter values for cores having the dimensions given in 4.2 are as shown in Table 3 and Table 4.
The definitions of effective parameters and their calculations shall be as given in IEC 60205.
4.3 Dimensional limits for coil formers
The main dimensions of coil formers suitable for use with a pair of P0-cores shall be as given in Table 5. See also Figure 3.
4.4 Pin locations and base outlines These shall be as shown in Figure 4.
4.5 Pin diameter
Coil former terminations (pins) shall be accepted by a gauge having 1,2 mm holes on a true position.
6.3 Chips and ragged edges
6.3.1 General
The minimum chipping area is taken as 0,5 mm2, to be distinguishable to the naked eye.
The maximum chipping area Is taken as 50 mm2, to be referenced to the design for the cores
6.3.2 Chips and ragged edges located on the mating surface
The areas of the chaps located on the mating surface (see Cl and Cl’ irregularities in Figure 6) shall not exceed the followIng lImits:
— the cumulative area of the chips located on the mating surface shall be less than 4 % of the total mating surface;
— the cumulative area of the chips located on the centre pole mating surface shall be less than 2 % of the total mating surface;
— the cumulative area of the chips located on the mating surface of one outer leg shall be less than 1 % of the total mating surface.
The total length of the ragged edges shall be less than 25 % of the perimeter of the relevant mating surface.IEC 63093-13 pdf download.
