Magnetics - Large Kool Mu Core Shapes
Just have a look at the comparison with various core materials.
you can check this thread where its mentioned as powdered iron cores getting hot at 400KHz
Amidon T200-2 core suitability for 1kWrms?
Just have a look at the comparison with various core materials.
you can check this thread where its mentioned as powdered iron cores getting hot at 400KHz
Amidon T200-2 core suitability for 1kWrms?
how much % lossy?I believe Kool Mu is pretty much the same as Sendust. Can't help feeling its going to be rather lossy compared to a gapped ferrite core.
on the site it states that Kool Mu has lower losses than Powder iron core.
Magnetics - Kool Mu and Powdered Iron Comparison
A few years ago I wanted to get some Ferroxcube TN26/11-3C20-A113 gapped toroids but couldn't find anywhere to buy them in small quantities.
http://ferroxcube.home.pl/appl/info/class D audio amplifier.pdf
http://ferroxcube.home.pl/appl/info/class D audio amplifier.pdf
I am happy with sendust based chokes for Arnold. They are extremely easy to use and will run cool-ish at up to 400kHz or more.
Mine is off-the-shelf rated 33uH at 8A and I believe is based on MS-080075.
That's good for, say 200W. For 1000W I'd look at MS-106075 (minimum) or preferably MS-130060.
Very accaptable EMI and HF behaviour.
High idiot proofness factor as permeability drops very gradually with DC bias, so the amp may be fine even with the lousiest short-circuit protection there is. This may not hold true for rapidly saturating ferrite cores.
The drawback is not so perfect linearity, unless you take care of it elsewhere (modulator, feedback etc.)
Mine is off-the-shelf rated 33uH at 8A and I believe is based on MS-080075.
That's good for, say 200W. For 1000W I'd look at MS-106075 (minimum) or preferably MS-130060.
Very accaptable EMI and HF behaviour.
High idiot proofness factor as permeability drops very gradually with DC bias, so the amp may be fine even with the lousiest short-circuit protection there is. This may not hold true for rapidly saturating ferrite cores.
The drawback is not so perfect linearity, unless you take care of it elsewhere (modulator, feedback etc.)
so KoolMu should be a good choice then?I am happy with sendust based chokes for Arnold. They are extremely easy to use and will run cool-ish at up to 400kHz or more.
Mine is off-the-shelf rated 33uH at 8A and I believe is based on MS-080075.
That's good for, say 200W. For 1000W I'd look at MS-106075 (minimum) or preferably MS-130060.
Very accaptable EMI and HF behaviour.
High idiot proofness factor as permeability drops very gradually with DC bias, so the amp may be fine even with the lousiest short-circuit protection there is. This may not hold true for rapidly saturating ferrite cores.
The drawback is not so perfect linearity, unless you take care of it elsewhere (modulator, feedback etc.)
Which core to be chosen for 1000W in 4ohm usage. If you can suggest from the below link it will be very helpful.
Magnetics - Kool Mu Cores
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