IEC 60404-6-2018 pdf free download
IEC 60404-6-2018 pdf free download.Magnetic materials – Part 6: Methods of measurement of the magnetic properties of magnetically soft metallic and powder materials at frequencies in the range 20 Hz to 100 kHz by the use of ring specimens.
This part of lEG 60404 specifies methods for the measurement of AC magnetic properties of soft magnetic materials, other than electrical steels and soft ferrites, in the frequency range 20 Hz to 100 kHz. The materials covered by this part of lEG 60404 include those speciality alloys listed in IEC 60404-8-6, amorphous and nano-crystalline soft magnetic materials. pressed and sintered and metal injection moulded parts such as are listed in IEC 60404-8-9, cast parts and magnetically soft composite materials.
The object of this part is to define the general principles and the technical details of the measurement of the magnetic properties of magnetically soft materials by means of ring methods. For materials supplied in powder form, a ring test specimen is formed by the appropriate pressing method for that material.
The measurement of the DC magnetic properties of soft magnetic materials is made in accordance with the ring method of IEC 60404-4. The determinations of the magnetic characteristics of magnetically soft components are made in accordance with IEC 62044-3.
NOTE IEC 62044-3:2000 specifies methods for the measurement of AC magnetic characteristics of magnetically soft components in the frequency range up to 10 MHz.
Normally. the measurements are made at an ambient temperature of (23 ± 5) °C on test specimens which have first been magnetized. then demagnetized. Measurements can be made over other temperature ranges by agreement between parties concerned.
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.
I EC 60050-121, International Electrotechnical Vocabulary — Part 121: Electromagnetism
lEG 60050-221. International Electrotechnical Vocabulary — Chapter 221: Magnetic materials and components
IEC 60404-2. Magnetic materials — Part 2: Methods of measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame
IEC 60404-4. Magnetic materials — Part 4: Methods of measurement of d.c. magnetic properties of iron and steel
IEC 60404-8-6, Magnetic materials — Part 8-6: Specifications for individual materials — Soft magnetic metallic materials
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-121 and lEG 60050-221 apply.
ISO and lEG 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 General principles of measurement
4.1 Principle of the ring method
The measurements are made on a closed magnetic circuit in the form of a ring test specimen wound with two windings.
4.2 Test specimen
The test specimen shall be in the form of a ring of rectangular cross-section which may be formed by
a) winding thin strip or wire to produce a clock-spring wound toroidal core; or
b) a stack of punched, laser cut, wire cut or photochemically etched ring laminations; or
c) pressing and sintering of powders, metal injection moulding, 3D printing or casting.
In the case of powder materials, the production of a ring test specimen by metal injection moulding or by pressing (with heating if applicable) shall be carried out in accordance with the material manufacturer’s recommendations to achieve the optimum magnetic performance of the powder material.
For all types of test specimen, burrs and sharp edges should be removed prior to heat treatment. It is preferable to enclose the test specimen in a two-part non-magnetic annular case. The case dimensions shall be such that it closely fits without introducing stress into the material of the test specimen.
The ring shall have dimensions such that the ratio of the outer to inner diameter shall be no greater than 1,4 and preferably less than 1,25 to achieve a sufficiently homogenous magnetization of the test specimen.IEC 60404-6 pdf download.
