Transistor frequency converter TRMK-R 45/20


Transistor frequency converter was made for company Peikko Deutschland GmbH. Together with a mid-frequency transformer and an appropriate inductor it is used for induction heating of rods made of magnetic steel.
Each inductor has got two holes to put the cold ends of the rods in. They are inserted by the operator alternately by one end into the free inductor hole. The light signalling indicates that the required temperature has been reached. The rod with the heated end has to be immediately put out of the inductor by the operator. If the operator does not put the rod out, the output of the frequency converter decreases and the temperature is kept constant.
The operation of the frequency converter is ensured by operating system consisting of regulator, converters and Programmable Logic Controller (PLC). The temperature of the heated rod end is measured by a non-contact thermomether UPF IV. The converter is operated with buttons and a communication panel placed on the door of the frequency converter. Heating parameters are set on the communication panel where all failures of the heater are displayed in text, including the instructions for troubleshooting.

Basic technical specifications TRMK-R 45/20

Nominal input values
Power Input [kVA]  54
Input voltage  [V]  3 x 400
Frequency [Hz]  50 - 60
Cooling water
Consumption [m3/h]  1,2
Input temperature [°C]  max. 32
Input pressure [MPa]  max. 0,4
Pressure loss [MPa]  0,2
Maximum warming thru loop [K]  13
Nominal output values
Output [kW]  43
Nominal output voltage [V]  200
Frequency [kHz]  14
Other parameters
Dimensions (d x š x v) [mm]  1100 x 1310 x 1275
Weight [kg]  200
Cabinet IP 32
Color RAL 7035
Technical parameters of heated material
Heated material magnetic steel 
 Dimensions of rods Ø D [mm] 10 - 40
length of heated part l [mm] 40 - 90
 Maximum heated amount [kg/h] 60
Rated output temperature of heated rod end [°C] 1100

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