Paralleling Power Supply Units Made Easy ???
I am considering paralleling a couple of 20a variable adjustable psu's for 40a charging. According to what I have read on the world wide inter-web, it can be done quite easily, provided the following ...
Forum Discussion
Yeah, you can do a search on power supply stability and they will all say state similar requirements: you need 30 to 45 degrees of phase margin and about 6 db of gain margin. If that requirement is met, you can do anything under the sun to try and destabilize it, but the PS will remain stable. Being stable means the output voltage remains in regulation and there are no oscillations after a disturbance is injected into the system.
BTW, the measurement is called an open loop response, but the loop is closed. The loop needs the dc bias or the pwm will go to 100%. First you open the loop and insert a transformer. The transformer injects a disturbance into the loop. I used a HP3562 to measure the loop response.
BTW, the measurement is called an open loop response, but the loop is closed. The loop needs the dc bias or the pwm will go to 100%. First you open the loop and insert a transformer. The transformer injects a disturbance into the loop. I used a HP3562 to measure the loop response.
LScamper wrote:
Yet another stability paper. About the same as the one Salvo noted.
It shows how to measure stability in a CLOSED LOOP system. You do not have to open the loop. It injects a stimulus into the loop. Is this the same as injecting a stimulus as in connecting another power supply in parallel? I think so. As long as the stimulus is not so big that it causes the loop to saturate it seems it should work.
http://www.edn.com/design/power-management/4412230/Testing-a-power-supply---Stability--Part-three-
