coreless
to
be
as
inherently must exist for a transformer to function? (so it does not matter if the core is present or not)
those designs are higher than the reflected currents (secondary current)
Well a quick check came up with hysteresis losses which requires a core material to be magnetized, and eddy current losses which also require a core that can conduct. I doubt that megnetoconstriction can be usefully applied here.
But is also appears that cores are possible.
?-)
A couple of years ago I made a converter with coreloss spiral windings, had efficiency of 65+% (in ressonance) and had no problems passing the EMC
Many are afraid of the EMC, but it's often exaggerated. The size of the transformer is close to 1000 times less than the wavelenght and as such the spiral transformer is a very low efficiency antenna.
Cheers
Klaus
Well, even the super tiny transformers in some of the AD isolated converters have given us the blues. At one client we had to redesign that part of the circuitry to get it through class B. But class B is still fairly easy, at least when compared to aerospace requirements.
-- Regards, Joerg http://www.analogconsultants.com/
inherently must exist for a transformer to function? (so it does not matter if the core is present or not)
designs are higher than the reflected currents (secondary current)
Ferrite is a nice material. After all, we've built sensitive receivers with it in there for decades :-)
-- Regards, Joerg http://www.analogconsultants.com/
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