DEVICE FOR INDUCTION HEATING OF METAL SLABS Russian patent published in 1997 - IPC

FIELD: induction heating. SUBSTANCE: induction heating device additionally uses the fourth, fifth, sixth gates, first, second, third pulse stretchers, item heating termination time pulse counter, item heating termination time decoder, second NAND gate, analog-to-digital converter, code converter, whose output via the fifth gate is connected to the combined set inputs of the item heating termination time pulse counter, whose outputs via the item heating termination time decoder are connected to the inputs of the second NAND gate; the scaler output is connected to the input of the analog-to-digital converter, whose output is connected to the code converter input; the clock pulse generator output via the sixth gate is connected to the count input of the less significant digit of the item heating termination time pulse counter, whose output is connected to the count input of the more significant digit of this counter; the control inputs of the second and third gates are connected to the input of the second pulse stretcher, and connected to the output of the first pulse stretcher, whose input is connected to the output of the storage element; the output of the second pulse stretcher is connected to the control input of the fifth gate and to the input of the third pulse stretcher, whose output is connected to the control input of the sixth gate; the output of the power setter via the fourth gate is connected to the second input of the power regulator, whose control input is connected to the output of the second NAND gate simultaneously with the combined reset inputs of the storage element, first and sixth gates. EFFECT: improved design. 3 dwg