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Glossary of terms for the magnetics industry Select a letter: A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z L Lg - Length Of The Air Gap The length of the path of the central flux line of the air gap; measured in centimeters. Lm - Length Of The Magnet The total length of magnet material traversed in one complete revolution of the center-line of the magnetic circuit; measured in centimeters. Lm/D - Dimension Ratio The ratio of the length of a magnet to its diameter, or the diameter of a circle of equivalent cross-sectional area. For simple geometries, such as bars and rods, the dimension ratio is related to the slope of the operating line of the magnet, Bd/Hd. Leakage Flux; Leakage Field That portion of the flux, which does not pass through the air gap, or useful part of the magnetic circuit due to a shunting to the opposite pole. See also, Fringing Field. Leakage Inductance The inductance associated with the leakage flux of a core coil. Legg's Equation An expression for total core loss at low flux densities. The sum of hysteresis loss, residual loss and eddy current loss. The equation is:
Rac = aBmaxf + cf +ef2
µL
where:
Rac = effective resistance due to core losses
µ = permeability of the core
L = inductance in henries
a = hysteresis loss coefficient
Bmax = maximum flux density in Gausses
f = frequency
c = residual loss coefficient
e = eddy current loss coefficient
Linear MaterialMagnetic material that exhibits fairly constant permeability over a wide range of MMF. Litz Wire A special type of wire that consists of many strands (sometimes hundreds) of magnet wire woven together to form a single conductor. This type of wire offers advantages over single strand at high frequency. Load That part of an electrical circuit that receives energy. Load Line Graphic representation of permeance. Loading Coils Inductors used to compensate for capacitance of long transmission lines. Please send all web related questions/comments to the Webmaster. TOP | BACK | HOME | HELP | MAP | CONTACT |
