azotic wrote:
I do have some comercial VFD"s and a couple of 3-Phase motors, and your
right
comparison is always a good idea. At this time i want to learn thru doing,
time and
cost are not a factor when have fun.
Oh, yeah, Don Lancaster has some REALLY interesting stuff he did
a few years ago. he called it "magic sine waves". It is mostly
a scheme for storing families of waves in EPROMS to synthesize
sine waves with the minimum number of transitions (less
transitions = less energy loss in the power transistors).
The scheme stores just a single-bit sequence in the EPROM for
every combination of frequency and voltage.

Jon