>        I have a lead on a possible commercial application of Magic Sine
waves as
>I understand them. Does anyone know where I can get information on them ??
>I realize that information of this type is not free.
>        Correct me if I'm barking up the wrong tree. A company needs to
vary the
>speed of some AC motors. Toshiba says that thier controller will not work
>in this situation. Long cable run and high voltage. They said the "
>Harmonics " would not allow thier controller to work. If I understand Magic
>Sine Waves, using them can eliminate most of the harmonics thus allowing
>the control of the motors. The company is paying DEARLY for some
>controllers now..
>        Any info is greatly appreciated.



Have a look at the addenda, by the way I would be interested in how you
progress,
I was looking at magic sinewaves recently and also about 2 years ago. But in
both
cases other jobs came up :(

I think its a great idea but, needs a lot of work, in basic theory and
practice in
implementation etc.

Rgds

Mike

--------------------------- Addenda ----------------------------------

Don Lancaster has written about "magic sinewaves".  Don has a homepage at

http://www.tinaja.com/

Enter the Reference Library, then the Magic Sinewaves Shelf and find this blurb:

                               Don  Lancaster's
                            Magic Sinewave Library

          "Magic sinewaves" are repeating long sequences of ones and
          zeros.  Digital sinewaves with precisely controlled amplitudes
          and amazingly low distortions.

          Compared to traditional PWM, magic sinewaves can offer far
          higher efficiencies and lower distortions. With circuitry that is
          elegantly simple and microcontroller friendly.  For use in such
          applications as induction motor speed controls, electric autos,
          solar panels, power factor correction, inverters, home energy
          efficiency improvers, and specialized utility services.

          There are more magic sinewaves than there are particles in the
          universe. Only recently have specialized analysis tools become
          available. Don Lancaster, Synergetics, and several Synergetics
          Partners are in the forefront of this billion dollar opportunity.

          Extensive seminars, consulting, sourcecode, tutorials, and a new
          Partners program are now being offered.


These files are available for downloading:

Magic Sinewave Development Proposal.
Formal proposal outlining seminars, partners, and services.
A wide range of opportuinities and possibilities are listed,
along with full references.

Blatant Opportunist #35  MAGSINE.PDF (*)
Magic sinewaves are a brand new method of driving ac induction
motors, solar panels, inverters, or electric cars. Offer ing outstanding
simplicity and efficiency. Introductory Don Lancaster tutorial.

Blatant Opportunist #37  EMERGOP4.PDF (*)
Fourth annual release of emerging technical opportunities.
Push me pull you. The TeraHertz mystery band. PIC microcontollers.
Magic Sinewaves. Solitons. DNA computing. Binary chain codes.

Bionomial Goes Binary ONESWORD.HTML *
A PostScript utility to generate all possible binary words of length
"n" having "k" ones in them. Use for magic sinewaves and exploration
of the binomial theorm. Requires two way recordable com.

An analysis of Magic Sinewave Higher Harmonics.
Just where do those square corners come from on a low harmonic
waveform? Jim Fitzsimons analyzes the first 999 (!) harmonics
of five typical 384 bit non-delta magic sinewaves.

Demo sampler of 288-Bit Magic Sinewaves.
A detailed analysis pf a few of the 288-bit "delta Friendly"
magic sinewaves. There are 49 amplitudes in the complete
288 sequence, having distortions as low as 0.01 percent.

Tech Musings #101  MUSE101.PDF ( June 1996 )
Using Delta-Wye transforms, Professional audio resources,
Acrobat amber beta software, Building your own Tesla coil,
Three phase magic sinewaves, more.

Tech Musings #93  MUSE93.PDF ( October 1995 )*
More on magic sinewaves, stepper motor driver chips, yet
another patent horror story, mid range Mench computer, a
collection of PCMCIA plug-in card resources.

Tech Musings #90  MUSE90.PDF ( July 1995)*
Fourier Series analysis, alternatives to plated through holes,
classic computer resources, a $200 GPS receiver, Newtek's
new video toaster for Windows.

Hardware Hacker #87  HACK87.PDF  (April 1995 )*
AC motor drive fundamentals. New Basic Stamps from Parallax.
PIC Microcomputer resources. Additional details on forced zero
magic sinewaves. Dealing with "too good to be true" results.

Hardware Hacker #86  HACK86.PDF  (March 1995 )*
The DNA computer language. Some wavelet book resources.
Magic digital sinewave codes. Engineering economics review.
Hot new fringe FM RBDS tuner.