Part Number: LAUNCHXL-F28377S
I loaded a Sinusoidal PWM simulink model (sine wave block and triangle generator block) to LAUNCHXL-F28377S, once the program is been loaded, the output of the pins is like what i expected ( same frequency set in the model and regular SPWM pulses' shape -wide pulses then narrow pulses- )
but after few seconds the frequency begin to decrease and the pulses become with same width almost !!!
Note: when i press the reset button on LAUNCHXL-F28377S the program return to its normal operation like when i just loaded it, then the problem starts again after few seconds.
I loaded a 180 degree conduction model (pulse generator blocks), it works properly with constant frequency,
but when i use a small dead time like 5us, it does not work properly.
1-Can any one help or explain the problem?
2-Is this model (sine wave and triangle generator) suitable for a DSP or should i use ePWM module?
3-Is there a good source to well understand how ePWM work?
Unfortunately, simulink models format (.mdl) is not allowed to be attached here!.
SPWM model:
180 degree model:
