 LC Parallel induction heater question
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Thomas
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Registered Member #120
Joined: Fri Feb 10 2006, 07:07AM
Location: Westchester New York
Posts: 83
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My half bridge is being supply 108vdc.
I'm full wave rectifying 120vrms with no filtering.
I have a filter cap and I will connect it once I know everything is sorted out.
My matching inductor's core gets hot. I guess it's saturating and it isn't meant for 200khz. However the manufacture data sheet shows it should be okay at 9A at 100khz. I guess I am pushing it.
I'll add a capacitor divider in the morning. Hopefully I can do it before work.
My circuit's source draws about .6A during operation.
Thank for the info. I see the capacitor divider in his circuit too.
My inverter volage and capacitor voltage is 90 degrees out of phase which is good.
So does the matching inductor keep a constant current to the work inductor and work cap.
I don't know by for some reason I'm totally confused. Ugh 3rd order stuff.
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IamSmooth
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Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
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Your core is saturating. You either need to stack more cores or bring your resonant frequency way down. Like I said before, you should get your frequency to under 100khz. You can do this by changing your tank capacitor.
Read the tutorial I gave you.
Richie has a nice tutorial that talks about the matching inductor here
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