P160-152JS

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Fixed Inductors

A fixed inductor is an electronic component that stores energy in a magnetic field created by electrodes or a coil when electric current drives a current through it. It is used primarily in circuits that require a steady voltage or current such as power supplies, radio frequency amplifiers, and signal conditioning circuits.The fixed inductor is usually constructed from coils, with core materials made of metal, ferrite, or other magnetic material. The number of coils in the inductor can vary, depending on the desired frequency of operation, but is usually limited to the number of windings available in the core. The winding is usually wrapped around a non-magnetic core made of phenolic plastic or a similar material.Fixed inductors typically have low parasitic capacitance, which results in low losses due to eddy currents. This makes them an ideal choice for radio frequency applications. The inductance of the inductor can be varied by adjusting the winding or core size, but this can be expensive and time consuming.Modern inductors also employ a variety of construction materials, such as ferrite or air cores, which increase the inductance of the inductor while minimizing the size. Depending on the design of the inductor, the inductance can be adjusted by changing the number of turns, the core material and size, or by changing the air gap between the coils. Fixed inductors are also used in switched-mode power supplies, such as forward converters, flyback converters, Cuk converters, and boost converters. These inductors have a range of switching frequencies, but generally the switching frequency is limited to the range of the primary and secondary inductors used in the circuit. The circuit usually contains a transformer, rectifier, and output filter to regulate the output voltage or current.Fixed inductors come in a variety of shapes and sizes, including shielded tubes, deformable rods, hollow cores, printed-circuit boards, and surfaces-mounted inductors. They are made from a variety of metals such as steel, copper, and aluminum, and can also be encased in paraffin wax or epoxy to reduce wire fraying and reduce losses due to eddy currents.In summary, fixed inductors are important components used in the design of electronic circuits, providing a consistent and reliable source of energy to power radios, amplifiers, and other devices. The construction material, type of core, and the number of turns used in the winding can be adjusted to vary the inductance of the inductor and, consequently, the characteristics of the circuit in which it is used.

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