PD IEC TR 63304:2021 pdf free
PD IEC TR 63304:2021 pdf free.Permanent magnet (magnetically hard) materials- Mlethods of measurement of magnetic properties in an open magnetic circuit using a superconducting magnet.
This document also describes methods to correct the influence of the self-demagnetizing field in the test specimen on the demagnetization curve measured in an open magnetic circuit. The magnetic properties are determined from the corrected demagnetization curve.
NOTE These SCM-methods can determine the magnetic properties of permanent magnet matenals with coercivity higher than 2 MAIm. The methods of measurement In a closed magnetic circuit specified in IEC 60404-5 can lead to significant measurement error due to saturation effects in the pole pieces of yoke for the magnetic materials with coercivily higher than 1,6 MAim (see IEC 60404.5).
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 60404-5. Magnetic materials — Part 5: Permanent magnet (magnetically hard) materials — Methods of measurement of magnetic properties
IEC 60404-8-1, Magnetic materials — Part 8-1: Specifications for individual materials — Magnetically hard materials
lEG 60050-121, International Electrotechnical Vocabulary — Part 121: Electromagnetism
IEC 60050-151. International Electrotechnical Vocabulary — Part 151: Electrical and magnetic devices
IEC 60050-221, International Electrotechnical Vocabulary — Chapter 221: Magnetic materials and components
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-121, IEC 60050-151, IEC 60050-221 and the following apply.
Principle of the method Figure 2 ilustrates schematic diagrams of typical test apparatuses. The test apparatus consists of a superconducting magnet (SCM), a moving device, a specimen rod, a magnetic field sensor (hereafter H sensor), a magnetic dipole moment detection coil (hereafter M coil), measuring devices and a data processing device (PC). The measurement is carried out in an open magnetic circuit to enable the determination of magnetic properties of permanent magnet materials with coercivity higher than 2 MA/m.
The axis of the DC magnetic field generated by the SCM is vertical and coaxial with the Mcoil and the specimen rod. The moving test specimen is placed in a zone where the magnetic field strength is uniform with a tolerance of +1 % at the centre of the SCM. The H sensor is placed in a zone where the influence of the magnetic dipole moment of the test specimen can be ignored.
A test specimen is firmly attached on the specimen rod so that the direction of magnetization is parallel to the axis of the specimen rod, and then placed in the test apparatus as shown in Figure 2.PD IEC TR 63304 pdf download.
