Error in SPWM Motor PWM Output

[kanchibhotla14]

Hello Sir,
I want to generate the SPWM and simple PWM to GPIOs ... SPWM of fundamental frequency 50Hz and Switching frequency 5kHz .....but when we build and run the program i am getting the switching frequency is of around 63Hz and fundamental frequency 2Hz ....simple PWM is of least frequency...
Ts = 2e-6 and Fixed step size is of 2e-6 (in solver) and MIPS 20e6 (in master).....even the fixed step size (in solver) is every time is resetting to 0.01..... I am attaching the simulation file...can you check and please tell me how to get the my required pwm frequency and spwm....even i tried with rate transition box but no use...

[LubinKerhuel]

Hello,

You will not generate a PWM efficiently using digital output blocks.
Use the PWM like block, or Output Compare block.

You might find some examples on the website or within blockset example folder.

Lubin

[pakerjon]

Thanks LubinKerhuel for giving the correction & new idea...

[Casper]

Thanks for making me understand about the exact issue. I was not aware about not to generate a PWM efficiently using digital output blocks. I usually use the PWM for the output blocks. Now on wards I will make use of the Output Compare block.





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