Principle of electromagnetic heating
Electromagnetic heating is an energy conversion process that uses electromagnetic induction to convert electrical energy into thermal energy. The rectification circuit converts the 50/60 Hz AC voltage into a DC voltage, and then converts the DC voltage into a high frequency with a frequency of 20 to 40 kHz through a power control circuit. Voltage, when a high-speed alternating current passes through the coil, the coil will generate a high-speed magnetic field. When the alternating magnetic field lines in the magnetic field pass through the metal pipe (magnetically conductive, conductive material), numerous small eddy currents are generated in the pipe wall to make the oil pipeline The wall itself is self-heating and exchanges heat with the crude oil to achieve the purpose of heating the crude oil.