Gene Heskett wrote: > > There are no caps on a class D output, in fact the circuitry is isolated from > as much capacitance in the load as possible with an inductor. Anything over > 10 pfs or so just wastes switching power in the active parts and can lead to > the destruction of the parts. > > For small power requirements, say 40 watts, Ramsey Electronics has a little > 2" > square, no heat sink required, 40 watt class D amplifier featured rather > prominently on the front page of their latest catalog, not terribly expensive > either. I would think, thinking as a C.E.T., that a few tens of microhenries > of choke isolation on each output lead would allow any number of them to be > paralleled for enough power to build your vfd regardless. 10 of them for a > 400 watt vfd would probably still be cheaper than a commercially built vfd of > that same power level. The switching waveform would have to be synchronized for this to work, I would think. Otherwise, the inductors would need to be much larger, or the amps would be fighting each other.
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