Generating SPWM using arduino-simulink environment

AI Thread Summary
The discussion focuses on generating sinusoidal pulse width modulation (SPWM) using Arduino and Simulink for an inverter board. The user successfully simulated SPWM logic in Simulink and confirmed that the Arduino output on pin 11 was functioning correctly. However, upon using specific blocks to generate SPWM, the output observed on the CRO was distorted and did not resemble the expected SPWM waveform. The user provided details on their Simulink configurations, including a fixed step size solver and specific frequencies for the triangle and sine waves. Assistance is requested to resolve the distortion issue in the SPWM output.
srinaath
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hi all...am trying to generate sinusoidal pulse width modulation using arduino-simulink for my inverter board...I simulated the SPWM logic in simulink, then installed the required support package for arduino-simulink...but i am facing some problems...I started from basic...like linking arduino and PWM block as shown belowhttps://www.physicsforums.com/file:///C:\Users\ccbzak\AppData\Local\Temp\msohtmlclip1\01\clip_image001.png I checked the output of Arduino pin11 from CRO and it was working fine….

Now I used this blocks to generate spwm…

https://www.physicsforums.com/file:///C:\Users\ccbzak\AppData\Local\Temp\msohtmlclip1\01\clip_image002.png

When I checked the output from CRO…..it was distorted…literally I didn’t get any SPWM wave…

Help me out with problem…

My Simulink configurations are

Solver: fixed step size

Step size:1e-5

Triangle wave frequency is 8KHz and sine wave is 50Hz…
 
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