How to Implement High-Speed SPWM Switching Using Simulink

We are developing a 100KHz high speed SPWM. As we developed it, there were some things that we couldn't solve.

1. For 100kHz, Duty needs to be updated in units of 10us.

-> Power GUI Sample Time was implemented in units of 1us in simulink.

Q. I want to update Duty Cycles in units of 1us, but I don't know how to measure Duty Cycle. How do I measure Duty Cycle in PWM?

Answer 1

[Angelo Yeo]

I understand that you're looking to determine the duty cycle from a PWM signal. The following link offers a function designed to calculate the duty cycle from signals using the Signal Processing Toolbox. Incorporating this function into the model should allow us to achieve the desired outcome. However, please note that this technique requires signal logging.

Duty cycle of pulse waveform - MATLAB dutycycle (mathworks.com)

Additionally, the demonstration provided in the link below illustrates how to calculate the duty cycle by analyzing the on-off switching signal within a Simulink environment. This could serve as a useful reference for your application.

Duty cycle of pulse waveform - MATLAB dutycycle (mathworks.com)

Hope this helps.