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Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Hehe, they are better of course. Well, a trade off really, the gate capacitance is much larger IIRC. Either way it doesn't matter, I'm on a student's budget, and I have had these at my disposal for a long time now. I'm maybe half-way through the pile, haven't checked for some time.
Registered Member #1838
Joined: Tue Dec 02 2008, 06:01PM
Location:
Posts: 38
That’s a lot of reasons toe use IRFP 450s There’s something which isn’t so obvious at first glance, that Ive learned the hard way. If you use a fixed length of copper tubing for the work coil, it doesn’t matter if you wind a lot of small diameter windings or if you wind only a couple of big diameter windings. The induction of the coil stays the same. I confirmed this in my physics book as well. Mabye it saves someone some trouble when building this induction heater
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Raka wrote ...
There’s something which isn’t so obvious at first glance, that Ive learned the hard way. If you use a fixed length of copper tubing for the work coil, it doesn’t matter if you wind a lot of small diameter windings or if you wind only a couple of big diameter windings. The induction of the coil stays the same. I confirmed this in my physics book as well.
Well, you should make the coil just bigger than your intended work piece to ensure the best coupling.
Uzzors, you can parallel MOSFETs for higher powers.
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Induction heater (featuring my new PLL driver :-O)
