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A spiral coil refers to a coil or inductor in the form of a spiral or helix. In this tutorial, we will explore the concept of Spiral Coil Inductance and the associated calculations and formulas based on the coil mean radius, wire coil number of turns, and coil depth.
A coil or inductor in the metal detector frame acts as both a transmitter and a receiver. The pulsed signal from the transmitter coil induces a signal in the receiver. The self-inductance of the circuit is affected by any metal object in the path (Figure \ (\PageIndex {5}\)).
In an inductor, the magnetic field is directly proportional to current and to the inductance of the device. It can be shown that the energy stored in an inductor \( E_{ind}\) is given by \[E_{ind} = \dfrac{1}{2}LI^2.\]
A circuit element used to provide self-inductance is known as an inductor. It is represented by the symbol shown in Figure 14.6, which resembles a coil of wire, the basic form of the inductor. Figure 14.7 shows several types of inductors commonly used in circuits.
We begin with the Kirchhoff loop rule (which provides a new challenge for us when it comes to inductors), then solve the differential equation as we did for the RC circuit previously. To use the loop rule, we need to label a current and choose a loop direction.
Inductive reactance is the opposition of inductor to alternating current AC, which depends on its frequency f and is measured in Ohm just like resistance. Inductive reactance is calculated using: X L = ωL = 2 πf L. Where. X L is the Inductive reactance; f is the applied frequency; L is the Inductance in Henry; Quality Factor of Inductor:
22 maj 2022 · An inductor in its simplest form consists of a series of wire loops. These might be wound around an iron core, although a non-ferrous core might also be used. For a simple single layer inductor, such as the one drawn in Figure 9.2.6 , the inductance is described by the following formula: \[L=\mu \frac{A N^2}{l} \label{9.7} \] Where
