33331C

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Fixed inductors are current-carrying coils that are designed to produce a specific amount of electro-magnetic field in a limited space. They are widely used in circuits for power supplies, antennas and other electronic applications for coupling energy or creating a shielded environment.

33331C Application Field and Working Principle

Fixed inductors are commonly found in power systems. Due to the inductive nature of these components, when a current flow through them, a magnetic field is created. This magnetic field induces a voltage in the wires that can be used to create a steady voltage in a circuit. For example, fixed inductors can be used in buck-boost converters where a low voltage output can be generated from a higher voltage input using the differences in voltage created by the magnetic field.

Fixed inductors can also be used in other electronic applications such as antennas, transformers, resonant circuits and snubbers. When used in antennas, the current flow through the inductor creates a magnetic field that transmits outwards, allowing for wireless transmission of signals. In transformers, the magnetic field induces a voltage in the secondary winding, allowing for power transfer.

In resonant circuits, fixed inductors are used to resonate with the capacitors to create high frequencies or store energy. This can be used to create high-frequency signals or to store energy in a power conditioning application. Lastly, snubbers are used for over-current protection and act as a buffer between the switching elements. In this application, the fixed inductor acts as an energy absorber.

The main characteristics of a fixed inductor are the inductance, its frequency response and the DC resistance. These all have an effect on the way the inductor functions within a circuit. The higher the inductance, the more magnetic field is produced for a given current flow. This means that higher inductors can be used for higher frequencies or power levels. The frequency response will determine the range of frequencies that the inductor will operate at before distortion occurs. Lastly, the DC resistance will affect the power levels and power efficiency of the inductor depending on the size and construction.

In conclusion, fixed inductors are widely used in various power and electronic applications due to their reliable performance and high efficiency. They are commonly used for buck-boost converters, antennas, transformers, resonant circuits and snubbers. The main characteristics that determine the performance of the inductor are the inductance, frequency response and DC resistance.

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