Debugging method of medium frequency power supply voltage limit of induction melting furnace

1. Turn on the intermediate frequency power supply, start the inverter, and slowly increase the power potentiometer to gradually increase the intermediate frequency voltage to 750v clockwise.

2. Adjust the limiter piezoelectric potentiometer W9 so that the intermediate frequency voltage does not rise with the rotation of the power potentiometer.

3. During debugging, it may happen that the intermediate frequency power supply voltage of the induction melting furnace does not rise to 750v. There are three reasons:

① Adjust the current-limiting potentiometer W counterclockwise slightly.

②See if the intermediate frequency voltage has risen.

③If it cannot rise, stop the movement.