Are induction heaters AC or DC?

An induction heater consists of an electromagnet and an electronic oscillator that passes a high-frequency alternating current (AC) through the electromagnet. The rapidly alternating magnetic field penetrates the object, generating electric currents inside the conductor, called eddy currents.

Can Inconel be induction heated?

Inconel 718 can also be roll-threaded after full aging by using induction heat to 700 °C (1,290 °F) without increasing the grain size.

How is series resonant circuit used in induction heater?

The induction heater concept discussed in this post uses a series resonant circuit. When a series resonant LC circuit is employed, we have inductor an (L) and a capacitor (C) connected in series, as shown in the following diagram.

What kind of frequency does an induction heater use?

Typical induction heaters use frequencies from 10kHz to 1MHz. DANGER: Very high temperatures can be generated with this device! The Circuit The circuit used is a type of collector resonance Royer oscillator which has the advantages of simplicity and self resonant operation.

What do I need to make an induction heater circuit?

The coil must be made of thick wire or pipe as there will be large currents flowing in it. Copper pipe works well as the high frequency currents will mostly flow on the outer parts anyway. You can also pump cold water through the pipe to keep it cool. A capacitor must be connected parallel to the work coil to create a resonant tank circuit.

How does an induction heater work with a capacitor?

You can also pump cold water through the pipe to keep it cool. A capacitor must be connected parallel to the work coil to create a resonant tank circuit. The combination of inductance and capacitance will have a specific resonant frequency at which the control circuit will automatically operate.