Single point temperature control system in continuous heaters

A single-point temperature control system is proposed and investigated in a continuous multi-section induction furnace to control the temperature of the metal load leaving the furnace. The furnace consists of at least three sections. The temperature is measured at a fixed point along the length of the second section on the surface of the workpiece and compared with the set temperature. The power of the second section is adjusted to maintain the desired temperature at a fixed point, which ensures the necessary temperature of the metal part at the exit of the furnace. For linear thermo-technical thin bodies, the position of the point and the value of the temperature in it can be determined analytically. Such a control system can be used for heating steel bars in a continuous modular induction heater.