I have found in practice that rectifier diodes conducting at half Ic they drop closer to 1V
Sent from my iPhone > On Jul 12, 2019, at 3:19 PM, Bill Prince <[email protected]> wrote: > > From my engineering days, we used to use 0.7 volts voltage drop for silicon > power diodes when forward biased. > > -- > bp > part15sbs{at}gmail{dot}com > > >> On Fri, Jul 12, 2019 at 12:29 PM <[email protected]> wrote: >> You can just use 2-3 of those rectifier diodes I sent a link to. Just make >> sure whichever type of diode you use, that you bolt it to a chunk of >> aluminum or something to suck out some heat. You just put them in series. >> Does not matter if it is positive or negative. They will act as a smart >> resistor. >> >> They will just drop X amount of volts irrespective of how much voltage you >> put in to the system. >> >> From: Sterling Jacobson >> Sent: Friday, July 12, 2019 12:53 PM >> To: AnimalFarm Microwave Users Group >> Subject: Re: [AFMUG] Still need help 50v DC regulator 6-10A >> >> Hmm, how does that work exactly in practice? >> >> >> >> Where do I solder in the 3v 7A Zener? Is it just in line with the positive >> or negative line? >> >> >> >> Or do I need to create a circuit with several of them in series and a >> resistor big enough to shed load between 48v and 56v when rush charging? >> >> >> >> From: AF <[email protected]> On Behalf Of Chuck McCown >> Sent: Thursday, July 11, 2019 5:43 PM >> To: AnimalFarm Microwave Users Group <[email protected]> >> Subject: Re: [AFMUG] Still need help 50v DC regulator 6-10A >> >> >> >> You could just put a 3 volt 7 amp zener diode in series too. >> >> Sent from my iPhone >> >> >> On Jul 11, 2019, at 5:07 PM, Sterling Jacobson <[email protected]> wrote: >> >> Oh wait, I see that these can be used in parallel and in different inputs. >> >> >> >> So really what I would do is get the DDR-240C-48 at 5A output, from a 48v >> battery string. >> >> Then if I needed more than 5A I just wire another unit in parallel per their >> diagram and have enough for 5-9A. >> >> >> >> Or if I just want/need two 12v batteries I can wire those in series for 24v >> and do UPS on that, and get one DDR-240B-48 instead. >> >> >> >> Basically what Jesse said, lol! >> >> >> >> >> >> From: AF <[email protected]> On Behalf Of Sterling Jacobson >> Sent: Thursday, July 11, 2019 4:51 PM >> To: AnimalFarm Microwave Users Group <[email protected]> >> Subject: Re: [AFMUG] Still need help 50v DC regulator 6-10A >> >> >> >> Ok, so instead of a 48v battery string, use a 24v battery string and connect >> up two 24v to 10A supplies on it and then connect the load/output side in >> series for 48v? >> >> >> >> >> >> >> >> From: AF <[email protected]> On Behalf Of Ken Hohhof >> Sent: Thursday, July 11, 2019 4:08 PM >> To: 'AnimalFarm Microwave Users Group' <[email protected]> >> Subject: Re: [AFMUG] Still need help 50v DC regulator 6-10A >> >> >> >> I’d use a Mean Well RSD-300C-48, but it’s not DIN rail mount and won’t meet >> your 10A requirement. >> >> >> >> One thought is that most isolated output DC-DC converters can have their >> output put in series, you could put two 24V 10A supplies in series. >> >> >> >> From: AF <[email protected]> On Behalf Of Jesse DuPont >> Sent: Thursday, July 11, 2019 4:26 PM >> To: AnimalFarm Microwave Users Group <[email protected]>; Sterling Jacobson >> <[email protected]> >> Subject: Re: [AFMUG] Still need help 50v DC regulator 6-10A >> >> >> >> How about this one? It's only 5A, though, could run a pair of them and split >> the load. >> >> https://www.trcelectronics.com/View/Mean-Well/DDR-240C-48.shtml >> >> On 7/11/2019 2:59 PM, Sterling Jacobson wrote: >> >> Sorry to beat a dead horse, but I’m still stuck on this mini-pop DC plant >> thing. >> >> >> >> Is there a DIN mountable voltage regulator that will allow me to feed load >> from 48v battery string without going over 50v at 6-10A? >> >> >> >> I’m still trying to power a couple of MetroLinq 2.5 antennas at the site, >> but people tell me they explode if given more than say 52v. >> >> >> >> Which means my float battery system will kill the radios if it goes into >> recharge mode at 54v? >> >> >> >> Or am I overthinking things? >> >> >> >> Looks like to solve this I would need something like Mean Well $100 >> SD-350B-48 between the battery array and the load to assure it sticks around >> 50v. >> >> >> >> Is that my only solution here? >> >> >> >> >> >> >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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