"Jon Elson" wrote in message
...
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


That sounds interesting, push pull power block driven with magic sine waves.
Gotta give it a try down the road.

Best Regards
Tom.