UCD3138064: KD_ALPHA_1 setting and PID at DYN setting suggestion

?? ?

Part Number: UCD3138064

I would like to ask KD_ALPHA_1 setting

KD_ALPHA_1 can set to how big and any suggestion for tuning KD_ALPHA_1

and the PID at DYN suggestion
use two psu current shearing and doing dyn 0.1us /0.1us 22.5A ~470A slew rate was 5a/us
any suggestion for PID

Filter0Regs.FILTERKPCOEF0.bit.KP_COEF_1 = 28827;
Filter0Regs.FILTERKICOEF0.bit.KI_COEF_1 = 600;
Filter0Regs.FILTERKDCOEF0.bit.KD_COEF_1 = 100

Filter0Regs.FILTERKPCOEF0.bit.KP_COEF_0 = 28827;
Filter0Regs.FILTERKICOEF0.bit.KI_COEF_0 = 600;
Filter0Regs.FILTERKDCOEF0.bit.KD_COEF_0 = 100

8 个月前

0 Taylor 8 个月前

TI__Mastermind 36785 points

Hi,

KD Alpha is a 9-bit signed integer. You can choose any value within that range. See page 157 on the UCD31xx Technical Reference Manual.

What topology are you using? You can use the Fusion Studio GUI to help visualize and configure your Kp, Ki and Kd values. The below screenshot is with the UCD3138A LLC firmware. You can modify your coefficients live and see how the changes affect the loop response.

What does "DYN" stand for? I am not familiar with this term.

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UCD3138064: KD_ALPHA_1 setting and PID at DYN setting suggestion