| 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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