2890R-32F

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Fixed Inductors

A Fixed Inductor is a passive two-terminal component designed to store and introduce a magnetic flux. This is accomplished when an electric current passes through its windings. Although similar in construction and applications to a Transformer, a fixed inductor does not require the presence of a secondary winding to store the energy, unlike the latter. Its main purpose is to provide DC (DC Coupled) or AC (AC Coupled) signal filtering, reactive loading, and voltage tuning.

The most commonly used type of fixed inductor is the 2890R-32F. It is made up of two perfectly aligned, parallel, coils and is typically air-coupled. A 2890R-32F inductor provides high accuracy and exceptional stability in both DC and AC applications, making it suitable for a wide range of applications.

Application Field

A 2890R-32F inductor is widely used in applications such as switching power supplies, audio filters, instrumentation amplifiers, ham radio transmitters, and biomedical signal conditioners. It is especially suited for low-power AC/DC switching power applications like LED lights, small motors, and other equipment that converse DC power into AC power.

Working Principle

At its core, the 2890R-32F operates on inductance principles. When current passes through the coil/wire winding, a magnetic field is generated. This magnetic field stores energy, creating an inductance. This inductance is then used to filter out unwanted signals, create reactive loads, and adjust capacitive tuning. The current and flux flows are also affected by the number of turns and windings of the coil, as well as the properties of the material used in its construction. The inductor is also affected by the environment, humidity, and temperature.

The inductance of a 2890R-32F is calculated by multiplying the number of turns (N) of the wire by the cross-sectional area of the inductor (A) and the permeability of the core material, as defined by the following equation: L = N x A x permeability.

Conclusion

The 2890R-32F is a very versatile fixed inductor that can be used in a wide range of applications. Its superior inductance properties, low power consumption, and stability make it a popular choice for power supplies, audio filters, and other AC/DC circuits. By understanding its working principle, the 2890R-32F can also be used to effectively filter out unwanted signals, create reactive loads, and adjust capacitive tuning.

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