On Mon, 15 Sep 1997, William Chops Westfield wrote:

> Is a three phase motor inherently more efficient than a DC motor?
> That would be one reason to go to magic sinewaves.

        Absolutely -- the way a DC motor works is by faking AC with the
commutator. Also, three phase motors are lighter (not a trivial concern --
the Lynch motor weighs over 30 lbs -- more than the bare hull, in fact :).
The speed control makes another 5 lbs.

>
> I think you're only generateing "one" sinewave at a time - the other
> two phases just pick off the sequence from a different offset, right?

        Bingo! And you make yr bit-length a multiple of 8, so all your
counters are at the same bit position in different bytes (makes yr code a
little less hairy).

        Pierce