Induction principle: the power to the furnace controller for converting the high-frequency electromagnetic magnetic energy - self-heating of the crucible magnetic field - heat to melt into liquid aluminum or zinc, we can see by comparing the use of energy-saving step will be less electromagnetic furnace heat of course, due to the presence of heat resistance can not be fully utilized all heat finish. Resulting in some loss. The furnace electromagnetic energy just to avoid the * end, let the crucible of self-heating, heating speed. And the conversion rate of 95%, this conversion rate, then it is all used up, can think and know is the ideal energy-saving effect.