DC DC converter for 84v??

[Philistine]

Has anyone seen a DC DC converter to convert 84V to 12v? This is to be able to run 12v stuff off my 20S setup.

I came across this:

http://adequate-energy.co.za/images/AEDCBrochure.pdf

Only other one I could find was this:

http://kellycontroller.com/dcdc-converter-c-33.html

Curious if anyone had found a cheaper or smaller one than these.

I have emailed the first link, but I think they mainly do commercial size orders, will see.

 

[adrian_sm]

Cheapest option would be to use a switch mode power supply, that puts out 12V DC.

Something like this.
http://cgi.ebay.com.au/Power-Supply..._Components&hash=item3ca43ab20c#ht_2999wt_935

Just put your battery DC in, where the AC usually would go, and hey presto 12V @ 5a out.

 

[Philistine]

Cool, thanks for that. I happen to have a spare one of those actually so I will give that a go. I hadn't even thought of trying that. Cheers.

 

[fechter]

Check out this thread:
http://endless-sphere.com/forums/viewtopic.php?f=16&t=2264

Most switchers should work at 84v input.

 

[Metallover]

Yeah!! Just tried it and it worked on ~72v 18s lipo. Yeah! This is awesome! Thanks for posting that I never know that would work.

 

[keyne]

Can anyone recommend a specific 12V switchmode from a common site like dealextreme or something that definitely works down to 45V? I've bought wo different ones that don't turn on until about 90V!

 

[NeilP]

Look on the Meanwell site, they do some...I think they are the same or similar to the ones Lyen sells. they only go up to 60volt input, but i am sure they work fine at 45 volt

 

[fechter]

Can anyone recommend a specific 12V switchmode from a common site like dealextreme or something that definitely works down to 45V? I've bought wo different ones that don't turn on until about 90V!

How many amps?

There's no real way to tell other than acutally testing one. I have some that will turn on as low as 20v.

 

[Farfle]

the $10 one I got on fleabay works down to around 32 volts, but its recovery time under load seems to slow down quite a bit at that voltage, good for constant loads, but not quick pulsating ones.

 

[keyne]

3 amps would do. 5 amps would be great. I've tried two that didn't work so well, just wanted to find one I can be confident to buy

 

[John in CR]

Can anyone recommend a specific 12V switchmode from a common site like dealextreme or something that definitely works down to 45V? I've bought wo different ones that don't turn on until about 90V!

Simple solution. Start running 100V and not only is the problem solved, but you get to have more fun too.