induktiolämmitys

Induktiolämmitys, also known as induction heating, is a non-contact method of heating electrically conductive materials using electromagnetic induction. It relies on the principle that a changing magnetic field can induce an electric current within a nearby conductor. This induced current, known as an eddy current, flows through the material and generates heat due to the material's electrical resistance, a phenomenon known as Joule heating.

The process typically involves an induction coil, through which an alternating current flows. This alternating current generates a fluctuating magnetic field. When an electrically conductive workpiece is placed within this magnetic field, eddy currents are induced in the workpiece. The intensity of the induced currents and thus the heating effect depends on the frequency of the alternating current, the conductivity of the workpiece, and its magnetic properties. Higher frequencies generally lead to more superficial heating, while lower frequencies can penetrate deeper.

Induktiolämmitys offers several advantages, including rapid and precise heating, energy efficiency, and the ability to heat specific areas of a workpiece without affecting surrounding regions. It is a versatile technology used in a wide range of applications, such as heat treatment processes like hardening, annealing, and tempering of metals, brazing and soldering, melting of metals, and in many industrial manufacturing processes. Its clean and controlled heating mechanism also makes it suitable for applications where contamination is a concern.