[Calculating voltage output of Capacitor in AC Circuit]

Hey folks, thanks for input. It is all making much more sense. I need to get myself an o-scope though. Am also reading the AC circuits pdf on the site which is enlightening if not long and technical. :-)

One question that someone might be able to answer is does running a DC motor with voltage ripple damage the motor at all, or just affect its performance?

Hamish

[Calculating voltage output of Capacitor in AC Circuit]

Thank you for help with this! I have been having fun lifting weights by blowing up ballons under a bowl with my newly powered mini air compressor. :) One thing though, I didn't understand the forumla, just apprecited the outcome - could someone clarify what p-p stands for?

Hamish

[Calculating voltage output of Capacitor in AC Circuit]

Hi there,

I'm trying to work out how to calculate the voltage output of a capacitor that I want to use as a filter after using a bridge rectifier.

The output from the secondary coil of the transformer is 12vAC max 4amps. The rectifier has a max of 400V and 8amps.

I want to understand how to work out what capacitor size I need to get a filtered 12V when I connect it in parellel with the rectifier outputs.

I used a 2200uf capacitor and my volt meter said about .3V. I then added a second 2200uf capacitor in parellel and I read 18V!

Can anyone point me in the right direction?

Cheers,
Hamish