Peace, mercy and blessings of God: when the input voltage equal to 1V and the output voltage equal to 5V. Our goal was to maintain the output voltage of the boost converter constante.Nous have used a simple P controller to achieve this goal. The converter output voltage can be controlled by the PWM signal given to the gate. How to calculate the PID boost converter. please help me
I would say, use a calculator. ;-) Without knowledge of which boost converter you are using or how your circuit looks like at the moment, it is very unlikely that somebody could give you a more qualified answer. Please provide more meaningful information.
Please don't use .docx, not all users can read this format. PDF would be more suitable. > document wrote: > the switching frequency was 31150 kHz, thus Ts= 0.05 ms . That does not work. Ill assume you use 31.15 kHz. > document wrote: > how to calculate the PID valueloop close it's a control loop :) First, let me ask you why you are using a microcontroller for controlling? Should the code hang the microchip, or do something unexpected, you're likely to burn your switching device. I would use an externel analog circuit for that purpose. But enough of that. The problem with P controllers is that they are not stable in a boost converter, because the converter has an RHPZ (right half plane zero). A PID controller can indeed deal with this problem. First, to build your control loop, have a look at http://www.ti.com/lit/ml/slup084/slup084.pdf they use a flyback converter, but it's similar to a boost converter. Now, when you have your transfer function, convert it to the z-domain, so it can be implemented in code. This is described here: http://lorien.ncl.ac.uk/ming/digicont/digimath/dpid1.htm also, more information is needed, do you want to run in CCM, CRM or DCM? (DCM is easy to control, but has more losses).
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