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In numerous applications of inductino heating (surface hardening, small-pieces heating), single-coil windings are small inductors with a low impedance are used, which makes it impossible to connect them directly to a standard mid-frequency converter with a rated output voltage of 400V to 800V.
The impedance created is typically solved by adding a transformer between the converter output and the inductor. Characterisitic parameters of MF transformers are:
Other desired parameters are good efficiency, low voltage, nízké napětí nakrátko and a low mass.
The various designs of transformers all have one common principle: water-cooled copper windings, a core made from plates no thicker than 0.2mm (or for higher frequencies, made from ferrite semi-product). The core normally has water cooling as well.
An example of a rather complex design solution is alternatively placed primary and secondary disk coils on a twin-column or jacketed core. The secondary windings are single-coil and are connected in parallel. Primary coils have one ro more coils and their varied count allowed them to be connected into series, and with this, the transformer transmission can be gradually changed.
10.12.2020 Thank you for your cooperation in 2020 and wish you many personal and work achievements in 2021. ROBOTERM Chotěboř wishes you a Merry Christmas and Happy New Year 2021! more...
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10.12.2019 Thank you for your cooperation in 2019 and wish you many personal and work achievements in 2020. ROBOTERM Chotěboř wishes you a Merry Christmas and Happy New Year 2020! more...
27.6.2019 The world's largest event in the field of heating and processing metals The Bright World of Metals 2019, held from 25th to 29th June 2019, opened its gates again after not being held for four years. more...
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