electromagnetic heater

Electromagnetic Heater:

A device that converts electrical energy into heat using the principle of electromagnetic induction. An electromagnetic controller converts 220V/380V, 50/60Hz AC power into DC through a rectifier circuit. This DC power is then converted to high-frequency, high-voltage power with a frequency of 20-40kHz by a control circuit. This rapidly changing, high-frequency, high-voltage current flowing through the coil generates a rapidly changing alternating magnetic field. When these alternating magnetic lines of force pass through magnetically conductive metals (iron, cobalt, nickel), they generate numerous small eddy currents within the metal, causing the metal to heat rapidly.

The working principle of an electromagnetic heater is as follows:

220V or 380V AC power is rectified and converted into DC power. This DC power is then filtered and converted back to AC power using an IGBT or thyristor. This generates high-frequency magnetic lines of force within the induction coil, which in turn generates eddy currents on the surface of the conductive workpiece within the coil, generating heat due to its own internal resistance.

Applications of electromagnetic heaters:

Plastics and rubber industries, such as: plastic film blowing machines, wire drawing machines, injection molding machines, pelletizers, rubber extruders, vulcanizers, and cable extruders;

Pharmaceutical and chemical industries, such as: pharmaceutical infusion bags, plastic equipment production lines, and liquid heating pipelines in the chemical industry;

Energy and food industries, such as: heating crude oil pipelines;

Food machinery, such as: equipment requiring electrical heating, such as cargo aircraft; and high-power commercial induction cooker motors;

Building materials industries, such as: gas pipe production lines, plastic pipe production lines, PE plastic rigid flat mesh, geonet production lines, automatic blow molding machines, PE honeycomb panel production lines, single- and double-wall corrugated pipe extrusion lines, composite air cushion film production lines, PVC rigid pipe, core foam pipe production lines, PP transparent sheet extrusion lines, polystyrene foam pipe extrusion lines, and PE stretch film production lines; and drying and heating in printing equipment.