Magnethicc
Member level 3
Hi Everyone,
I am asking the following:
Is there any article or a practical approach to compensate a converter (AC-DC / DC-DC / BiDirectional, etc.. etc..) without knowing the transfer function?
Every piece of information I found they assume I have the transfer function of the converter but in practice if we don't have a loop analyzer then the compensation (at my workplace atleast) is made by using past compensators, seeing if this oscillates/overshoots too much --> change component values based on the experience of the veteran engineers.
And even after the converter is stable we put it in 60C degrees ambient and again if things oscillate change component based on the experience of the veteran engineers.
I was wondering if anyone have a good explanation on how to compensate by feel and not by math:
1. which compensator to choose?
2. what every resistor and capacitor in the compensation network is going to help with?
3. what are the trade-offs for a pole/zero higher/lower in frequency?
4. what is most likely the culprit in different types of the converter responses?
etc.. etc...
Thank you.
I am asking the following:
Is there any article or a practical approach to compensate a converter (AC-DC / DC-DC / BiDirectional, etc.. etc..) without knowing the transfer function?
Every piece of information I found they assume I have the transfer function of the converter but in practice if we don't have a loop analyzer then the compensation (at my workplace atleast) is made by using past compensators, seeing if this oscillates/overshoots too much --> change component values based on the experience of the veteran engineers.
And even after the converter is stable we put it in 60C degrees ambient and again if things oscillate change component based on the experience of the veteran engineers.
I was wondering if anyone have a good explanation on how to compensate by feel and not by math:
1. which compensator to choose?
2. what every resistor and capacitor in the compensation network is going to help with?
3. what are the trade-offs for a pole/zero higher/lower in frequency?
4. what is most likely the culprit in different types of the converter responses?
etc.. etc...
Thank you.