IEC 62044-3:2000 pdf free download Cores made of soft magnetic materials – Measuring methods – Part 3: Magnetic properties at high excitation level
1 Scope
This standard provides measuring methods for power loss and amplitude permeability of magnetic cores forming the closed magnetic circuits intended for use at high excitation levels in inductors, chokes, transformers and similar devices for power electronics applications.
The methods given in this standard can cover the measurement of magnetic properties for frequencies ranging practically from d.c. to 1 0 MHz, and even possibly higher, for the calorimetric and reflection methods.
The applicability of the individual methods to specific frequency ranges is dependent on the level of accuracy that is to be obtained. The methods in this standard are basically the most suitable for sine-wave excitations. Other periodic waveforms can also be used; however, adequate accuracy can only be obtained if the measuring circuitry and instruments used are able to handle and process the amplitudes and phases of the signals involved within the frequency spectrum corresponding to the given induction and field strength waveforms with only slightly degraded accuracy.
NOTE It may be necessary for some magnetically soft metallic materials to follow specific general principles, customary for these materials, related to the preparation of specimens and prescribed calculations. These principles are formulated in IEC 60404-8-6.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 62044. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 62044 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60050(221 ):1 990, International Electrotechnical Vocabulary (IEV) – Chapter 221 :Magnetic materials and components
Amendment 1 (1 993)
Amendment 2 (1 999)
IEC 60205:1 966, Calculation of the effective parameters of magnetic piece parts
IEC 60367-1 :1 982, Cores for inductors and transformers for telecommunications – Part 1 : Measuring methods
IEC 60401 :1 993, Ferrite materials – Guide on the format of data appearing in manufacturers’ catalogues of transformer and inductor cores
IEC 60404-8-6:1 999, Magnetic materials – Part 8-6: Specifications for individual materials – Soft magnetic metallic materials
IEC 61 332:1 995, Soft ferrite material classification
3 Terms, definitions and symbols
3.1 Definitions
For the purposes of this International Standard, the following definitions apply in addition to those of IEC 60050(221 ).
3.1 .1
(effective) amplitude permeability (symbols: amplitude permeability: µ a , effective amplitude permeability : µ ea )
IEC 62044-3:2000 pdf free download
