en>Yobot: Category first letter small using AWB (9513)

2013-10-08T06:10:57Z

Category first letter small using AWB (9513)

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'''Legg's equation''' models magnetic material core loss at low flux densities. The equation has three loss components: hysteresis, residual, and eddy current.<ref>{{harvnb|Arnold Engineering Company|unknown|p=70}}</ref><ref>{{harvnb|Legg|1936}}</ref><ref>{{harvnb|Snelling|1988|p=38}}</ref>

==Equation==

:<math>\frac{R_{\text{ac}}}{\mu L} = a B_{\text{max}} f + c f + e f^2</math>

where
:: ''R''<sub>ac</sub> is the effective core loss resistance (ohms)
:: ''μ'' is the material permeability
:: ''L'' is the inductance (henrys)
:: ''a'' hysteresis loss coefficient
:: ''B''<sub>max</sub> is the maximum flux density (gauss)
:: ''c'' is the residual loss coefficient
:: ''f'' is the frequency (hertz)
:: ''e'' is the eddy loss coefficient

IEC Technical Committee is the modern definition.<ref>{{harvnb|Snelling|1988|p=38}} refers to Publication 401</ref>

==References==
{{reflist}}

*{{Citation |last=Arnold Engineering Company |title=MPP Cores |publisher=Arnold Engineering Company |location=Marengo, IL }}
*{{Citation |last=Legg |first=Victor E. |title=Magnetic Measurements at Low Flux Densities Using the Alternating Current Bridge |publisher=Bell Telephone Laboratories |journal=[[Bell System Technical Journal]] |volume=15 |issue=1 |pages=39–63 |date=January 1936 |url=http://www3.alcatel-lucent.com/bstj/vol15-1936/articles/bstj15-1-39.pdf }}
*{{Citation |last=Snelling |first=E. C. |title=Soft Ferrites: Properties and Applications |edition=second |publisher=Butterworths |location=London |year=1988 |isbn=0-408-02760-6 }}

[[Category:Electromagnetic components]]

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Weak trace-class operator - Revision history

en>Yobot: Category first letter small using AWB (9513)