Explanation about PID Control

[madhu.b]

Hello,

I am working on DC-DC converters. In which I need to maintain the constant output voltage like 24V. So that I used the micro control in the feedback loop. In order to control the feedback I need to use PID control as a closed loop. But, how to calculate the Proportional Gain (KP), Integral Gain (Ki) and Differential Gain (Kd) values. Please explain clearly with examples and equations...

 

[mtwieg]

There is no one exact approach to designing PID feedback, especially for DC-DC converters. To even approach the problem you should answer a few things:
1. What is the open loop transfer response of the system? Under all feasible operating conditions, that is.
2. What performance aspects are most important for my application? Rise/fall time, bandwidth, overshoot, disturbance rejection, etc.
3. What sort of analytical methods are you familiar with? Bode plot? Nyquist plot? Root locus?

 

[madhu.b]

I don't have any idea about three points. But, I would say that for my application I need to control Rise time that's what I know.
Below I have given the link for an image which contains a load resistance value and output voltages. When I am vary my load resistor I need to maintain the constant output voltage like 24V (+/- 5% tolerance)..

https://obrazki.elektroda.pl/1823519000_1360402754.png