Power inductor
An inductor is a passive electrical device that stores energy in a magnetic field. Inductors or inductor coils are generally used to heat conductive material by currents induced by varying an electromagnetic field. Electromagnetic energy is transferred from the inductor to a workpiece. Inductors are used in DC-DC converters, switching power sources and other devices and equipped in various electronic apparatuses. In the field of power electronic devices, a wide range of circuitry is known and currently available for converting, producing and applying power to loads. Depending upon the application, such circuitry may convert incoming power from one form to another as needed by the load. Many power electronic circuits require filtration through the use of chokes or inductors used on either a line side or a load side of the circuitry, or both. Such inductors serve to limit current, shape waveforms and improve harmonics. Power inductors receive a relatively high DC current and may operate at relatively high frequencies. A power inductor may be used in a DC-DC converter, which typically employs inversion and/or rectification to transform DC at one voltage to DC at another voltage.
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