74437321068 Inductors, Coils, Chokes

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Fixed Inductors

A fixed inductor, as its name implies, is a component whose inductance value cannot be altered. The type of fixed inductors we\'ll discuss here are usually called \'iron core\' or \'iron laminated core\' inductors. They are employed in almost all electronic applications, including radio, TV receivers and other consumer appliances. A fixed inductor also goes by the names of chokes, coils, inductance coils, solenoids and reactor coils.

74437321068 application field and working principle

Fixed inductors are commonly used in electronic circuits for signal conditioning, resonant circuits, resonant frequency tuning, power conversion, and filtering. In electronic circuits, they can also be used as AC/DC coupling elements, noise suppression circuits, and decoupling circuits. The working principle behind fixed inductors is based on Faraday\'s law of electromagnetic induction. This law states that when a current flows through a conductor, it induces a voltage in another coil that is magnetically linked to it. Therefore, the voltage appears across the inductor due to the inductance, impedance, and self-resonant frequency.

Fixed inductors have several common application fields, such as inductive circuit components, switching circuits, EMI/RFI suppression circuits, and high voltage switching circuits. In terms of inductive circuit components, fixed inductors are used for filter circuits, gain control ranges, frequency change traps, and AC/DC converters.

For switching circuits, fixed inductors are used as transformer cores in power supplies. They are also used to control the magnetic flux and provide magnetic coupling between the primary and secondary circuit inductors. In EMI/RFI suppression circuits, fixed inductors are used to suppress signal transmission and eliminate interfering signals. They can also be used as input filters to reject any electrical noise generated in the power supply.

Finally, in high voltage switching circuits, fixed inductors are used to control the turning on and off of high power devices by rapidly varying the voltage across the inductor. As high power devices usually require large amounts of energy when they are turned on and off, a fixed inductor can be used to control the voltage across the device. This prevents the device from overloading and ensures a smooth transitions while turning on and off.

In summary, fixed inductors are a vital component that is employed in almost all electronic circuit applications. These components work by inducing a voltage across them due to the inductance, impedance, and self-resonant frequency of the circuit. They are used for signal conditioning, resonant circuits, resonant frequency tuning, power conversion, EMI/RFI suppression, and high voltage switching circuits.

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