View Single Post
Old 13th Nov 2020, 1:05 pm   #51
Radio Wrangler
Moderator
 
Radio Wrangler's Avatar
 
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,801
Default Re: R1155 Modern Power Supply

Capacitor-input rectifier-filters do peak rectification to a first approximation all the time.

Choke-input rectifier-filters give a DC output equal to the mean of the rectified AC... appreciably less than the peak rectified voltage of the capacitor input job. BUT if the current demand goes low, the voltage rises to the peak rectifier value. So to make a choke input job give a reasonably stable output voltage, there is a minimum current which must be taken. It has to be enough that the rectifier never drops out of conduction over its full half-cycle. This forces you often into larger choke inductances and larger cores than you'd like. Otherwise the choke input job is kinder on rectifiers passing smoother less concentrated current waveforms through them.

DAvid
__________________
Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
Radio Wrangler is offline