Hello everyone,
I want to design a PID controller for a closed-loop control system. Here I have IGBTs in Half-bridge configuration, I am sensing current output from a hall effect sensor, and taking it as feedback. By the current feedback, I am controlling the PWM to drive the IGBT. I have a set point and I have current feedback, which I can subtract and get the error. then I need to design a Prpotional control and integral control. So I do not know how to give proportional gain and integral gain. As in the control system, I have a transfer function which I do not know how to calculate for a non-linear system like in the switching circuit. So what are the other ways to calculate Proportional gain and integral gain?
I am going to use SG3525 for the PWM controller and Op-amps for the PI implementation. Further, it will be replaced with a PID algorithm using a microcontroller.