>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?
>
>
>
>
>
>
>
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