100-680K

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Fixed Inductors

Fixed inductors are components used in electrical circuits to introduce inductance. They are also known as "inductors" or "chokes". The purpose of an inductor is to store energy in the form of a magnetic field and control the flow of current in the circuit.

Fixed inductors range in value from 100 nanohenries to 680 kilohenries, and the part number often indicates the inductance value. Inductors can be made from a range of materials including copper wire, air, and ferrite. Common uses for fixed inductors include power supply filters, antenna tuning, and pulse transformers.

Types of Fixed Inductors

There are several basic types of fixed inductors including air coil, toroidal, molded, and transmission line. Air coils are formed by winding wire around a form or bobbin and then covering it with an insulating material. Toroidal inductors are wound in the shape of a toroid (ring) and are the most efficient in terms of size and weight. Molded inductors are made by using a stacked core with insulated copper windings. Transmission line inductors are wound on a ferrite or iron powder core with a gap in the middle.

Applications and Working Principle

Fixed inductors are found in a variety of electronic applications including power supplies, RF circuits, and motor controllers. They may be used to block high frequency signals or provide filtering, as well as provide coupling between stages. The main purpose of an inductor is to store energy in the form of a magnetic field and regulate the flow of current in a circuit.

The working principle of a fixed inductor is based on Faraday’s law of induction. According to this law, when a conductor is exposed to a changing magnetic field, a voltage is induced in the conductor and an electric current is produced. An inductor works similarly, except that the voltage across an inductor is proportional to the rate of change of current. This allows inductors to store energy in the form of a magnetic field and regulate the flow of current in a circuit.

In practical applications, fixed inductors are used to provide filtering or blocking of high frequency signals, as well as coupling between stages. Filtering is used in power supplies to reduce noise and provide a cleaner voltage, while blocking is used to protect circuits from dangerous high frequency currents. Inductors can also be used in motor controllers to reduce the current ripple and noise, and in RF circuits to provide tuning and impedance matching.

Fixed inductors perform an important role in a variety of electronic applications, from power supply filters to antenna tuning and pulse transformers. With a wide range of components available, it is important to understand the different types of fixed inductors and their applications in order to ensure optimal performance.

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