Introduction of inductance coil

Before we know the inductance coil, I think we should first say what is the inductance of the inductance coil, and what is the inductance of the inductance coil?. Originally called inductance coil inductance, that is, inductors, inductors can be converted into magnetic energy and stored components. The inductor is constructed like a transformer but only with one winding. An inductor has a definite inductance that prevents changes in the current.

The inductance of an inductance coil is a characteristic of the closed loop, i.e., when the current in the closed loop is changed, the inductance of the inductance coil will appear electromotive force to resist the change of the current. The inductance, known as inductance, is the characteristic of the closed loop itself. Suppose that the current changes in a closed loop and that the electromotive force occurs in another closed loop due to induction. This inductance is called mutual inductance.

The most original inductor of the inductance coil is the iron core coil used by the British M. Faraday in 1831 to detect electromagnetic induction. In 1832, J. Henry of the United States announced a thesis on the phenomenon of self induction. The unit of inductance is called Henry. Inductors were used in the telegraph, telephone and other devices in the mid nineteenth Century. In 1887, H.R. Hertz in Germany, in 1890, the American N. Tesla used in the test of inductors are very famous, are called Hertz coil and Tesla coil.

The inductance of an inductance coil can be made of a conductive material winding around a magnetic core, typically a copper wire, or a magnetic core, and may be replaced by ferromagnetic material. The core data, which is higher than the permeability of the air, can restrain the magnetic field more tightly around the inductance element, thus increasing the inductance. There are many kinds of inductive coil, enamel coated wire wound ferrite bobbin is made, and some of the coil inductance protection completely in ferrite.