Re: [AFMUG] Still need help 50v DC regulator 6-10A

Fri, 12 Jul 2019 11:58:37 -0700

Zeners come in different sizes and voltages. Depending on the power, it may require a heat sink. It could be inline, or you might hook it through a terminal block.


bp
<part15sbs{at}gmail{dot}com>
On 7/12/2019 11:53 AM, Sterling Jacobson wrote:

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 <af-boun...@af.afmug.com> On Behalf Of Chuck McCown
Sent: Thursday, July 11, 2019 5:43 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
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 <sterl...@avative.net> 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 <af-boun...@af.afmug.com> On Behalf Of Sterling Jacobson
Sent: Thursday, July 11, 2019 4:51 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
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 <af-boun...@af.afmug.com> On Behalf Of Ken Hohhof
Sent: Thursday, July 11, 2019 4:08 PM
To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com>
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 <af-boun...@af.afmug.com> On Behalf Of Jesse DuPont
Sent: Thursday, July 11, 2019 4:26 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>; Sterling Jacobson <sterl...@avative.net>
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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