3. Crucible induction furnace

Historically, the first induction furnace for industrial use was not the crucible furnace, but the channel furnace. . This is the closest to the design of a current transformer. In fact, the inductor part of a channel furnace consists of: a primary coil, a magnetic circuit or core, and a single-turn secondary circuit, called a channel in this case.

The crucible induction furnace, on the other hand, has no channel and no magnetic core. It is mainly used for melting metals or metal alloys.

There are two main furnace families:

• low-frequency (LF) crucible furnace, or mains frequency (50 or 60 Hz depending on...