Is the intermediate frequency melting potentiometer regulating the voltage ?

The current intermediate frequency melting furnace is the third generation. The main board is designed like this. The potentiometer first adjusts the DC voltage, and then adjusts the intermediate frequency voltage. The final result is to adjust the power of the intermediate frequency melting furnace . The specific adjustment principle is that the motherboard is designed with a voltage regulator. The impedance regulator, as well as the inverter angle adjuster, first adjusts the power of the furnace through a voltage regulator, and then adjusts the inverter angle to adjust the power of the furnace. It is to adjust the power, voltage and current will adjust with the potentiometer and raise the voltage at the same time, which is the control voltage of the motherboard .