mottagarspolen

A mottagarspolen, often translated as a receiver coil or induction coil in English, is a fundamental component in many electronic devices that utilize electromagnetic induction. It functions by generating an electrical current when exposed to a changing magnetic field. This principle is the reverse of how a transmitter coil operates, which creates a magnetic field from an electrical current.

The core of a mottagarspolen is typically a coil of wire wound around a core material, which can be air, iron, or ferrite. The number of turns in the coil and the properties of the core material significantly influence its inductance and its ability to interact with magnetic fields. When a fluctuating magnetic field, such as one produced by a nearby transmitter coil or a permanent magnet in motion, passes through the mottagarspolen, it induces a voltage across the coil's terminals. This induced voltage then drives an electrical current.

Mottagarspolener are essential in various applications. In wireless power transfer systems, they receive energy transmitted wirelessly. In metal detectors, they detect the change in a magnetic field caused by a metallic object. They are also used in inductors, transformers, and radio receivers to tune into specific frequencies or to step up or down voltages. The precise design and construction of a mottagarspolen are tailored to the specific requirements of its intended application, balancing factors like sensitivity, frequency response, and physical size.