CHAPTER 6 - FERRITES
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Attributes of ferrites
- Initial permeability μi: it is measured in a close magnetic circuit (of rectangular intersection 35x12x18mm) with very small intensity of the magnetic field. It depends on the temperature and the frequency as shown in Figure below and b and the following equation is applied:The cut frequency fc is the one where μi is halved, from its value in (1~10)KHz.
- Amplitude permeability μa: it is the relation between B and H without the presence of a polarization field DC and is provided by the following equation:
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