PORTABLE 126Vdc Meanwell charger selectable for 1.5 or 2.5kW

[Doctorbass]

I had this idea since few month and i decided to try that when i found the thread about the RSP-2000 power supply.

Yesterday i built my 1500-2500W charger for 30s lipo ( 126Vdc) from 2 meanwell RSP-1000-48 connected in serie and i also used 4x DC-dc converter BXB150 connected in 2s2p to boost the voltage of each meanwell to 63V.

I have installed a switch on the second shunt resistor to allow full power from a 120V 15A outlet or from a 220V 15-30A outlet. It work great!

The overall size is the same as the RSP 1500 model but is having a heatsink and 4 DC-Dc converter on it to boost the voltage.

The measured efficiency between the AC input POWER and the DC output POWER is 84% while the Power factor remain 0.99.

The efficiency of the DC-DC is in the best optimum area of the input voltage vs efficiency curve since i am supplying them at 50Vdc from the adjusted meanwell so the lost of the dc-dc is minimal.

I also added some protecting diode ( shottky) on the output of the DC-DC to protect against reverse current flow during the momentanous unsynchronized power up of all the serie source.

I now have my portable STABILIZED cc-cv 30s cahrger that i can use for 1500W or 2500W output depending if i can connect on 120 or 220V outlet by a simple flip of a switch :wink:

Doc

 

[liveforphysics]

Nicely done Doc!

 

[cwah]

Doc, oohhh Doc, whenever you post something, I barely understand how it works. For me it's magic :lol:

Please sell us an voltage converter we would be able to put to any meanwell, that would simplify so much the life of many of us. (Ok, it's just a dream.. :lol: )

 

[Kingfish]

Awesome Doc! 8)

Q: Where did you find the DC-DC converters?

Cheers to you, KF

 

[Doctorbass]

Awesome Doc! 8)

Q: Where did you find the DC-DC converters?

Cheers to you, KF

Ebay for 5$ each... not bad for 150W conversion voltage each :wink:

These are the BXB150

You can get some from Tyco, Lucent or Artersyn

Doc

 

[grindz145]

Wow, not bad for 150W DC-DCs.

Portable is pushing it though

PS do you have a good source for the RSP-1000 supplies?

 

[Ypedal]

Doc, oohhh Doc, whenever you post something, I barely understand how it works. For me it's magic :lol:

+2

Daamn.. i struggle with this.. and i hate it.