METHOD FOR CONTROLLING INDUCTION HEATER

摘要

PURPOSE:To control an induction heater by providing the flexibility and readiness to the changes in the size of a strip and desired heating temp. or heating rate and considering the heat loss at a coil part as well as the free running part between the coils. CONSTITUTION:When the part of a strip for changing the desired heating temp. or heating rate or the part for changing the size of the strip reaches the inlet of an induction heater, the balance is calculated based on the strip size and the temps. detected by the atmosphere thermometers set at each coil part and free running part between the coils using a heat balance model equation considering the heat loss (temp. drop) produced while the strip travels from the inlet to outlet of the heater, and the required optimum power is supplied to the heater to obtain the desired heating temp. or heating rate.