Question about the 2p2z controlle coefficient

user3636465

Intellectual 530 points

In the HV_SOLAR_DC_DC_Rev1 routine,in the current loop, the coefficients of the 2p2z controller are directly assigned.

How do you roughly determine the values of these parameters?

In the voltage loop, the coefficients of the 2p2z controller are calculated by Pgain_V, Igain_V and Dgain_V.

Why is the coefficient of the 2p2z controller in the current loop not calculated by Pgain_I, Igain_I and Dgain_I?

Thank you very much！

over 6 years ago

0 Shamim Choudhury over 6 years ago

TI__Genius 12035 points

This is a DC/DC boost topology. The controller coefficients are designed from the loop gain analysis (Bode plot loop gain) using small signal model of the boost converter. These models are available in literature. One reference could be TI appnote SPRA902A

http://www.ti.com/lit/an/spra902a/spra902a.pdf

You can use either the PID controller or the 2p2z controller for the voltage loop and the current loop. We chose to use PID gains for the voltage loop and 2p2z gains for the current loop. You can do it either way.

Shamim

0 user3636465 over 6 years ago in reply to Shamim Choudhury

Intellectual 530 points

tank you

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Question about the 2p2z controlle coefficient