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HOME : TECHNOLOGY CENTER : REFERENCE MATERIALS : GLOSSARIES : E 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 E Eddy Current Loss Core loss associated with the electrical resistivity of the magnetic material and induced voltages within the material. Eddy currents are inversely proportional to material resistivity and proportional to rate of change of flux density. Eddy current and hysteresis losses are the two major core loss factors. Eddy current loss becomes dominant in powder cores as the frequency increases. Edge Wave A measurement of the deviation of a strip from a flat surface parallel to the rolling direction. EI Loop Test A method of observing the dynamic hysteresis loop properties of a soft magnetic core. This test is frequently used when cores are to be matched in pairs, etc. Electrical Resitivity The electrical resistance to current flow in ohms per unit length of the material being evaluated. Electromagnet A magnet formed by current flowing through a conductor. The electrical conductor may be wire, copper plate or strips of foil and may exist with a permeable material such as steel to conduct the field to desired areas. The magnetic field exists only so long as current flows through the coil. Elongation A term used in mechanical testing to describe the amount of extension of a test piece when stressed in tension; a measure of material ductility. EMI Filters Filter unwanted noise (EMI = electromagnetic interference). Energy Product The energy that a magnetic material can supply to an external magnetic circuit when operating at a point on its demagnetization curve; measured in megaGauss-Oersteds (MGOe). See also BHmax. Energy Storage Inductors Inductors used for power conversion rather than filtering or tuning. Epoxy Impregnated Cut cores are impregnated with an epoxy to make the core rigid. No insulative purpose is intended. Epstein Test A standardized method of evaluating unprocessed thin-gauge alloy for core loss and permeability. Excitation Current The current which produces magnetic energy (or flux) in an inductor. Copyright © Arnold Magnetic Technologies Corporation. All Rights Reserved. Please send all web related questions/comments to the Webmaster. TOP | BACK | HOME | HELP | MAP | CONTACT