Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

core loss
loss in the ferromagnetic material comprising the core of an electric machine or transformer, composed of the sum of hysteresis losses and eddy current losses. These magnetic losses are caused by time varying fluxes in a ferromagnetic structure.
Hysteresis losses are caused by friction in molecules as the dipoles in a structure change direction of alignment in response to an applied alternating voltage, while eddy current losses are resistive losses .I 2R/, due to circulating currents in the core.



See magnetic core memory
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