COMPLETE EQUIPMENT FOR INDUCTION HEATING

Reconstruction of thyristor frequency converter TMK-F2-400/4/0,6 for INPO Ltd., Hošťálková

8.9.2014

Thyristor frequency converter was reconstructed for Alper a.s., Prostějov. Together with a three-phase separating transformer and the load of oscillatory circuit, which is induction billet heater SOP 400/4-A30 P/L/T, it is used for induction heating of steel billets with circular or square cross-section up to forging temperature.
The aim of the reconstruction was to increase the reliability of its operation. During the reconstruction, the existing controller was replaced by a new one with four base units with progressive CMOS integrated circuits. The original double-bridge inverter was replaced by a single-bridge one with modern thyristors which simplifies the whole structure, makes the maintenance easier and increases the reliability of the device. Also a Programmable Logic Controller was added and the water management system including thyristor coolers was exchanged.

Basic technical specifications TMK-F2-400/4/0,6

Nominal input values (power circuits)
Power Input [kVA] 485
Input voltage from separating transformer [V]   3 x 400
Frequency [Hz]  50
Nominal input values (control circuits)
Power Input [kVA]  2
Voltage [V] 3 x 400
Frequency [Hz]  50
Cooling water (external cooling loop)
Consumption [m3/h]   3,6
Input temperature [°C]  max. 30
Input pressure [MPa] max. 0,4
Pressure loss [MPa]  0,12
Maximum warming thru loop [K] 5
Cooling water (internal cooling loop)
System capacity [l] 25
Nominal output values
Output [kW]  400
Nominal output voltage [V]  600
Frequency [kHz]  1,3 - 4
Ostatní parametry
Dimensions (d x š x v) [mm]  1430 x 830 x 2100
Weight [kg]  1300
Cabinet IP 43
Color RAL 7035

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