DIN EN IEC 63300:2024-09

This document provides the test methods for the electrical and magnetic properties of magnetic powder cores used for inductive components in electronics equipment, switch-mode power supplies and power conversion equipment, and introduces measuring principles, scope of application and matters of importance for each method. The parameters used to characterize the magnetic powder cores include: inductance factor, effective permeability, complex relative permeability, temperature coefficient of permeability, frequency coefficient of permeability, DC bias characteristic, power loss, and quality factor. This document is the basis for determining the characteristic parameters of magnetic powder cores. Magnetic powder cores have the properties of low relative permeability, high saturated flux density, and low loss. Therefore, the equivalent impedance of a sample of magnetic powder core is much smaller compared to unmelted ferrite, and the magnetization current is very large, so that the required excitation source needs both high frequency and high power capacity, which is difficult to achieve in practice. In addition, the impedance angle of a magnetic powder core under test is very close to 90°, which makes it very difficult to obtain accurate measurements of power loss. The IEC 62044 series of standards provides measurement methods for magnetic properties at low and high excitation levels for magnetic cores made of magnetic oxides or metal powders. However, the methods presented in IEC 62044 cannot fully meet the requirements for measuring the magnetic properties of magnetic powder cores. It is therefore necessary to have a standard for suitable measurement methods for the magnetic properties of magnetic powder cores. This standard introduces new test methods using pulse wave excitation and direct current methods that take the properties of magnetic powder cores into account, in addition to some modifications to the traditional test methods. In addition, the standard ideally introduces a single- or double-wound air-core inductor in order to verify or calibrate the accuracy of the test methods for magnetic properties of magnetic powder cores, as the properties of an air-core inductor are linear. There are no restrictions on the scope of application of the document. Through its application, the document increases investment security for manufacturers and users, provides testing laboratories and manufacturers with defined information for testing, and increases product compatibility between manufacturers.