generation of sine wave using pwm module of dspic30f6010

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From English to

Threaded View
hi all,
i have a dspic30f6010.i would like to generate a sine wave with this
for an ac induction motor.i would like to know whether there is any
method for controlling the amplitude of sine wave. and also details abt
the c code for generation of sine wave using dspic30f6010.


Re: generation of sine wave using pwm module of dspic30f6010
Quoted text here. Click to load it

Try posting to the Microchip dsPIC forum. That's where most dsPIC experts
tend to lurk.

Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller



Re: generation of sine wave using pwm module of dspic30f6010
Quoted text here. Click to load it

Consider:

    ______------______------

    --__----------__--------

    ________--__________--__

Mix these signals together with the appropriate amplitudes (3
resistors) and you have a sinewave with no harmonics below the 5th,
I believe.  It takes very little analog filtering to get a clean
sine from it.  You get the waveforms from anything running at 3
times the desired frequency.  The result, before filtering, is
about:

          __--__      __--__
    --__--      --__--

The filter and final output involves 4 resistors, one capacitor,
and an op-amp.  You can generate all the phases you want, in steps
of 1/6 cycle.

--
"If you want to post a followup via groups.google.com, don't use
 the broken "Reply" link at the bottom of the article.  Click on
We've slightly trimmed the long signature. Click to see the full one.
Re: generation of sine wave using pwm module of dspic30f6010
Consider pulse density modulation with external filtering.



Quoted text here. Click to load it



Site Timeline