Why is the medium frequency induction furnace heating slow?

Why is the medium frequency induction furnace heating slow?

The newly made induction coil spacing is no problem. The copper tube is not blocked and is discharged into the workpiece.

Consider the efficiency degradation caused by capacitor attenuation. It is recommended to add or replace new capacitors.

Parallel? Try adding a few resonant capacitors! It is also possible that the intermediate frequency power supply is aging and the output power is insufficient.