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Terms & Definitions |
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Core-Tech Soft Ferrite Materials |
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Static Magnetization curves |
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Relative Loss Factor Vs Frequency |
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Inductance Change Vs Temperature |
| EMI (Electromagnetic Interference) | ||
| A useful definition of EMI noise is any signigicant signal energy that causes unintended, undesirable circuit function or inadequate EMC performance. | ||
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| AC Initial Permeability (£giac) | ||
| This is the limit value of magnetic core permeability at the origin of the virgin magnetization curve. It's given by the following formula: | ||
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| Inductance (L): | ||
| The magnetic flux linkages in Maxwells-turns per ampere of magnetizing current. | ||
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| Inductance Factor (AL) | ||
| Inductance factor is defined as the self inductance per unit turn of a coil of a given shape and dimension wound on a magnetic core, and is determined by the following formula: | ||
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| Quality Factor (Q): | ||
| The efficiency of an inductor, that is the ratio of series inductive reactance to loss resistance. | ||
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| Loss factor (tan£_): | ||
| Deviation from ideal phase angle (90°) due to losses. | ||
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| Relative Loss Factor (tan£_ /£giac) | ||
| Losses per unit of permeability. Figure merit of a material. | ||
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| Curie Temperature (Tc): | ||
| emperature at which a ferromagnetic material loses its ferromagnetism and becomes paramagnetic(£g approaches 1) | ||
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| Relative Temperature Coefficient of lnitial permeability (£\£gr): | ||
| This is the value obtained by dividing the temperature coefficient of the initial permeability(£\£g) by the initial permeability. | ||
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| Specific Gravity (d) | ||
| It's calculated from its volume and weight, as shown below: | ||
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