Much clearer. I agree totally. The only justification for either MIL-STD-461-like or CISPR 22-like CE control is operation of sensitive radio receivers from or near the power bus. Absent that, only normal time domain power quality ripple limits need be applied.
---------- >From: "Brumbaugh, David" <[email protected]> >To: "'Ken Javor'" <[email protected]> >Cc: "'emc-pstc'" <[email protected]> >Subject: RE: Conducted Emissions for PS output >Date: Wed, Nov 17, 1999, 5:25 PM > > Maybe I've been working on space systems too long...you can draw your own > conclusions about that. At any rate, even though it isn't likely to be what > Derek was after in the first place, let me try to make my statement clearer: > What I was referring to was the distinction between a power converter > (e.g., dc-dc converter) for a single LRU in a large system, in contrast to > a unit that is a power supply (like a DDCU on the space station) that is > converting power from an unregulated source (let's say a solar panel) and > providing regulated power to a number of units on a power bus. The former > would typically have a much more stringent output ripple requirement (as > indicated by Robert Macy) than the latter. > DB > >> ---------- >> From: Ken Javor[SMTP:[email protected]] >> Sent: Wednesday, November 17, 1999 3:39 PM >> To: Brumbaugh, David; EMC Discussion Group; 'Derek Walton' >> Subject: Re: Conducted Emissions for PS output >> >> Re this: "If the power supply is for a single unit utilizing a common power >> bus for the power supply input, then the output ripple of the supply might >> need to be controlled more stringently, perhaps on the order of tens of >> millivolts." >> >> Huh? Maybe I've been in Alabama too long, but I don't understand what you >> are saying. >> >> ---------- >> >From: "Brumbaugh, David" <[email protected]> >> >To: EMC Discussion Group <[email protected]>, "'Derek Walton'" <[email protected]> >> >Subject: RE: Conducted Emissions for PS output >> >Date: Wed, Nov 17, 1999, 7:52 AM >> > >> >> > If the power supply is for a single unit utilizing a common power bus for >> > the power supply input, then the output ripple of the supply might need to >> > be controlled more stringently, perhaps on the order of tens of millivolts. >> > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
