The first discovered the phenomenon of induction person is Michael Faraday, induction phenomenon is basically a coil of conductive material (such as copper). Current flows through the coil, and a magnetic field is generated in and around the coil. The ability of the magnetic field to act depends on the coil design and the amount of current through the coil.
The direction of the magnetic field depends on the direction of the current. Therefore, the change in the direction of the alternating current through the coil causes the direction of the magnetic field to change, and the rate of change is the same as the rate of change of the alternating current. 50 Hz AC causes the magnetic field to change 50 times in one second. 400 kHz AC causes the magnetic field to change 400,000 times in one second.
When a workpiece of conductive material is placed in a changing magnetic field (such as a magnetic field generated by an alternating current), a voltage is generated in the workpiece (Faraday's law). The induced voltage will bring the flow of electrons: this is the current! The current through the workpiece is opposite to the direction of the current in the coil. This means that we can control the frequency of the current in the workpiece by controlling the frequency of the current in the coil.
When current passes through the medium, the movement of the electrons encounters some resistance. This resistance is manifested by heat (Joule heating effect). Although the greater the resistance of the material to the flow of electrons as the current passes through the material, the more heat is generated, it is also possible to heat the highly conductive material (such as copper) using an induced current. This phenomenon is very important for induction heating.
Generally speaking, a set of induction heating system including: power supply,
furnace body and water cooling part.