# Induction Heating

Discussion in 'The Projects Forum' started by HeXx, Dec 27, 2012.

1. ### HeXx Thread Starter New Member

Dec 27, 2012
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Hello,
I have been reading allot lately about induction heating, and from what i understood is that it works with an alternating current passing trough a coil making the part being heated magnetic. I live in Europe so i already got an alternating current directly from the plug. Its 220 Volt 60 Hz.
For induction heating to work if i am not mistaken we need a much higher frequency at around 20-50khz. How can I make the 220V 60hz AC work at 20-50khz?
AC current from the plug works with a wave of Vmin=0 Vmax=220 i think.
For a induction heater to work would it have to be Vmin=-220 and Vmax=220?

Thank you.

2. ### kubeek Expert

Sep 20, 2005
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No and no. Mains AC voltage of a 220V line swings between -310 and +310V peak.
For an induction heater, the voltage depends on the coil you use and the required power. The high frequency is needed because metals have greater magnetic losses at such frequencies so they heat up more easily, and also because the size of the inductor and capacitor needed for 50Hz resonance would be huge and impractical.

3. ### HeXx Thread Starter New Member

Dec 27, 2012
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So can you help me with a circuit design that would allow the use of the house socket power cord and that would change it to the appropriate voltage/amperage/frequency to be used on a 8 turn 2cm diameter copper tube with the coil inside diameter of 15cm.
This is for a furnace.

Thank you.

Sep 20, 2005
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Dec 27, 2012
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