103-222G

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103-222G Application Field and Working Principle

Fixed inductors are the most common type of inductor. They are widely used in applications from communications to power electronics. Fixed inductors are designed to have a certain inductance value that does not change significantly when exposed to varying currents. This makes them ideal for applications where consistent operation is important. Fixed inductors are commonly used in power electronics, low-frequency filters, and radio frequency (RF) circuits.

Working Principle

Fixed inductors can be either air cored or have cores made from a more conductive material such as ferrite, iron, or powder-filled cores. These cores allow more electrical current to be stored in the inductor, resulting in a higher inductance. The working principle of a fixed inductor is based on the fundamental law of electromagnetic induction, which states that an induced current will flow in a closed loop when a magnet is moved into, or out of, the loop.

When an alternating current is applied across the terminals of an inductor, an electric field is produced in the core by the current. This field induces a magnetic field that stores energy in the core. When the current is changed, this field is altered and an opposing current, known as a counter electromotive force (EMF), is generated. This counter EMF is proportional to the rate of change of the current flowing through the inductor and is thus called self-inductance. The self-inductance of a fixed inductor is constant over a wide range of frequencies.

Applications

Fixed inductors are used in a wide range of applications. They are commonly used for impedance matching in radio frequency (RF) circuits, such as amplifiers, oscillators, and filters. They can also be used in high-power switch mode power supplies for smoothing the output waveform and reducing noise. Additionally, fixed inductors can be used in audio circuits for noise reduction and in low-frequency filters for removing unwanted noise. Other common applications include mobile phones, computer motherboards, and satellite communications systems.

Conclusion

Fixed inductors are widely used in many types of electronic circuits. Their capability of storing energy makes them ideal for applications such as RF circuits and power supplies. Fixed inductors also have the ability to block out unwanted signals, making them useful for a variety of commercial and industrial applications. By understanding the working principle and the different applications of fixed inductors, it is possible to choose the best type of inductor for a given application.

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