TMS320F28034: Questions about using TMS320F28034 as a digital power supply

liujun

Part Number: TMS320F28034
Other Parts Discussed in Thread: C2000WARE

Tool/software:

Is T the period of PWM triggering AD or the period of PID calculation output in the Discrete Time PID Controller for DPEK document?
I am currently planning to use PWM for high-voltage BUCK, where the PWM cycle is 20KHZ and triggers AD sampling (the output voltage value of BUCK collected by AD).

May I ask if the output of PWM is PID calculation output every time PWM is interrupted, or PID calculation output after N times the PWM cycle?

over 1 year ago

0 Shamim Choudhury over 1 year ago

TI__Genius 12195 points

PID

0 Shamim Choudhury over 1 year ago in reply to Shamim Choudhury

TI__Genius 12195 points

PID calculation can be done at the PWM frequency or at a lower frequency. You choose these two frequencies separately.

For PID calculation we use the interrupt loop. For PWM generation, the PID output from the interrupt loop is used to update the PWM duty cycle, or PWM period or PWM phase shift whatever you want to control

0 liujun over 1 year ago in reply to Shamim Choudhury

Intellectual 310 points

Hi Shamim

Can you provide relevant documents and links regarding examples of PID?

0 Shamim Choudhury over 1 year ago in reply to liujun

TI__Genius 12195 points

There is no such specific documents on PID examples. But we have used PID in all of our reference designs in C2000Ware DP SDK. Pls download that and review the related documentation.

You can also check the documentation in this folder after you download C2000Ware

C:\TI\c2000\C2000Ware_5_04_00_00\libraries\control\DCL\c28\docs