Medium and High Frequency Generators

for Industrial Inductive and Capacitive Heating Applications

We manufacture inductive and capacitive middle and high frequency generators with an output power ranging from 1.5 kW to 600 kW. The working frequency is between 5 kHz and 27.12 MHz.

Inductive Heating
The work piece in case of inductive heating consists of an electrically conductive matter or a semiconductor (silicon). The high frequency energy is transferred to the work piece by means of an inductor. This inductor is adapted to the geometric form of the heating zone, is in most cases made of bent copper hollow section and is cooled with water.
Some typical applications out of the wide variety of inductive medium and high frequency generators for industrial applications are listed below (up to 600 kW, 5 kHz to 2.5 MHz):

- Surface hardening and full hardening of steel components
- Welding and annealing of pipes
- Brazing, soldering
- Block heating for hot shaping
- Heating and melting of ferrous metals, non-ferrous metals and other materials, such as glass
- Unstressed annealing
- Recrystallization annealing
- Epitaxy plants for semiconductor fabrication

Capacitive Heating
The work piece in case of dielectric or capacitive heating consists of electrically non-conductive material, whereby its molecules are being polarized if it is placed within the electrical field of a capacitor. If this should be an alternating field, then the dipoles thus generated will perform oscillations, so that the electrical energy introduced in the field will be converted directly to heat within the material. In theory, the heating effect will be distributed evenly with respect to time and location over the entire mass, but in practical use the heat will flow from the inside to the outside to a certain degree due to the heat dissipation on the surface. Due to the heating-up of the material with a given work piece volume, electrical field strength and material loss factor will increase with frequency, this procedure functions only with high frequency.

Some typical applications are also listed in the following (up to 200 kW, 13.56 / 27.12 MHz, stable):

- Drying of foods, textiles, paper, chemical products, foundry cores, raw tobacco... - Drying and bonding of wood - Baking of bread, biscuitS... - Sterilization of food and pharmaceutical products - Thawing of deep-freeze products - Melting of chocolate... - Foaming of synthetic materials - Hardening of prefabricated concrete parts and fiber-reinforced resins - Welding of plastic materials - Vulcanization of various rubber products - Gelatification of explosives

We do, however, also manufacture equipment for special purposes. Please contact us, if you would like to receive detailed information.