TIDM-HV-1PH-DCAC: PWM Modulation - Choices

The firmaware for these TIDs is example quality, for the code running in this mode was not a requirement hence I cannot comment on the level of difficulty, because that will be dependent on the individual experience and comfort level. 

You will need to change PWM drivers etc for this to work, you should be able to resue most of the control loop items.

-Manish

thanks

my experience and comfort level are increasing rapidly after spending quite some time on this project, however I am aware that my levels are still very lacking;

regardless I will perservere with your help (much appreciated!)

i'm trolling through the VSI code looking for where the PWM periods are set for Q1/Q2 (20khz) and Q3/Q4 (60hz)

I can see Q1/Q2 being set to 5000 ticks, however am not easily able to identify where Q3/Q4 are being triggered from?

Which area of code is driving Q3/Q4?

Thanks

void setupInverterPWM

Hi Manish,

Sorry to nag, just checking that this enquiry hasn't slipped through the cracks.

Regards

Robin

Robin,

Both the legs PWM1 and PWM2 are configured for 20kHz, 

When 100% duty is desired on one of the PWMs we use action qualifier actions whcih we change based on if duty is greater than zero or less than zero,

See

  inline void updateInverterPWM(uint32_t base1, uint32_t base2, float32_t duty)

The base 2 behavior is changed per the half cycle to utput a high or a low, also the active fet for the PWM is also different between the two of them, 

-Manish

did the above answer your question? 

Ok,

Please start a related thread with a specific question and we should be able to provide a quick answer once you are ready.

we will close this thread. 

-Mansih