sine lookup table for UNIPOLAR SPWM based sine wave inverter

[--BawA--]

hello
I am designing a smps based sine wave inverter of 500VA 220v/50Hz. i have succefully designed DC-DC converter stage.
my aim is to convert 311VDC to 220V ac sinusoidal.
for this ,i have designed a H-BRIDGE driven by a UNIPOLAR SPWM.
i am using a microcontroller (DSPIC33FJ32MCPWM) to generate the UNIPOLAR SPWM of 20KHz carrier and 50Hz fundamental .
can any one help me to derive a sine lookup table for UNIPOLAR SPWM.

 

[bigdogguru]

I came across this discussion thread and thought you might find it of interest:

SPWM dspic33f / sinusoid PWM

While SPWM inverter design is not a forte of mine, I have utilized sinusoidal and other transcendental function lookup tables for other purposes.

You can utilize MATLAB, Mathematica or other mathematical analysis applications to generate the lookup table data, even Excel can be used for such a purpose.

The required specifics of the generated data largely depends on the specific program design and the selected microcontroller.


BigDog

 

[--BawA--]

thanks bigdogguru