How to deal with the harmonics of induction melting furnace?

At present, the cost of harmonic control of induction melting furnace is very high, and it is no exaggeration to say that it will exceed the cost of purchasing an induction melting furnace.

At present, there are two more popular ways to control harmonics of induction melting furnaces:

First, the special harmonic filter for induction melting furnace. This kind of harmonic filter is based on the measurement result, designing a special filter branch for the harmonics of the characteristic frequency to achieve the purpose of harmonic control of the induction melting furnace.

The second type is the active filter. Active filters can dynamically suppress harmonics below the 21st order. This kind of harmonic control method is more expensive than the special harmonic filter for induction melting furnace, and the price difference is about 5 times.