TMS320F28379D: Facing problem with the ADC measurement of a software defined inverter using TMS320F28379D DSP

I want to attach the code (zip file) here. How can I do that?

Mohammad,

I would take a look at some of the examples in C2000Ware for your device, this should give some good guidance on how to set up the ADCs to sample the channels of interest.

You can attach code by selecting "insert" then "image/video/file"

Best,
Matthew

Hi MatthewPate,

Thanks a lot for your reply. I have attached the code here for your kind perusal.

8311.Code.zip

Mohammad,

I'll try and take a look at the simulink tomm, but looking at the C output I'm not seeing where the ePWM setup happens that would trigger the ADC.  We would need to enable the correct SOCA or SOCB that routes to the ADC, but I'll take another look to see if I missed this.

Best,

Matthew

Hi MatthewPate,

Thanks a lot for your reply. The SOC trigger source is selected as ePWM12_ADCSOCA. Whereas, the ADC A_IN1 triggers interrupt at the EOC. I am confused that the channels of four modules are working sequentially SOC0,SOC1,.....SOC14 in the code. EOC  is triggered by  ADC A_IN1 which is assigned as SOC1. Is that creates the problem? Is there any procedure need to follow while using multiple channels from four modules are assigned in a sequence?. The MATLAB software version is 2020b.

I highly appreciate your help. Thank you!

Best regards,

Mohammad

SimulinkCode.zip

Mohammad,

I'm having some issues with my MATLAB install, will need to get this up and working before I can take a look at your file.

Have you also filed a request on MW forum/service request?

Best,

Matthew

Hi Matthews,

I am getting ADC count in three phase voltage measurement. But in dq0 frame I am getting zero voltage after signal conditioning. I have applied dq0 conversion on the raw ADC count of abc voltage measurement too. Still I am getting zero which is wrong. What could be the possible reasons. I have got current measurement data. The DC voltage measurement is also working.

5556.SimulinkCode.zipUpdated Code.

Mohammed,

In the raw voltage plot you are showing ~ mid code or 1.5V.  I'm assuming in the formulas this is considered the common mode, i.e. you care about deviation from this value.  The raw is showing about +/-40LSB about this mid code I'm not sure if the signal conditioning (dq0) should be removing that much spread from the raw value or not.  Would values in the +/-40LSB about 0 make sense?

Best,

Matthew