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 电磁感应加热辊技术原理

Technical principle of electromagnetic induction heating roller

    电磁感应加热辊是利用电磁感应原理将电能转换为热能的能量转换过程。当电源接到控制器，

电磁控制器将交流电整流、滤波、逆变成20—40KHz的高频交流电流，高速变化的电流通过电磁

线圈时，产生高速变化的磁场，磁场内的交变磁力线通过金属辊体时，金属辊体内产生无数的小

涡流，由于金属辊体具有电阻特性，使金属辊体本身自行快速发热。辊体内的温度传感器对辊体

检测，并传输到控制柜的温控仪中显示和控制，控制信号通过数据线再输入到电磁控制器中，从

而对辊体的温度精确控制。

         The electromagnetic induction heating roller is a process of converting

electric energy into heat energy by using the principle of electromagnetic induction.

When the power supply is connected to the controller, the electromagnetic controller

rectifies, filters, and inverts to a high frequency AC current of 20-40 kHz. When the

high speed changing current passes through the electromagnetic coil, the magnetic

field changes at high speed. When the alternating magnetic field in the magnetic field

passes through the metal roll body, there are numerous small eddy currents in the metal

roll body, because of the resistance characteristic of the metal roll body, The temperature

sensor of the roll body detects the roll body and transmits it to the temperature controller

of the control cabinet to display and control, and the control signal is re-input to the

electromagnetic controller through the data line. Thus the temperature of the roll body is

accurately controlled.