Circuit for DC to DC Convertor.
Circuit for DC to DC Convertor.
(OP)
Hi
I need to convert a DC 200V supply to 24VDC,10 to 15 Amps for battery charging purposes in a boat. Is there any commercially available converters available?
WOuld appreciate also if anyone can provide me a schematic to build one.
Thanks in advance..
I need to convert a DC 200V supply to 24VDC,10 to 15 Amps for battery charging purposes in a boat. Is there any commercially available converters available?
WOuld appreciate also if anyone can provide me a schematic to build one.
Thanks in advance..





RE: Circuit for DC to DC Convertor.
RE: Circuit for DC to DC Convertor.
If you want to build your own, you might want to consider a DC-DC converter such as those made by VICOR and their competitors. Some can work directly off the 200 VDC.
Actually, it might be easier and lower cost to get a surplus power supply from Marlin P Jones or some other surplus company providing you have 120 or 220 volts AC available.
RE: Circuit for DC to DC Convertor.
I've worked boats most of my life. On a boat, alternating current is considered a luxury. As the sea is a harsh mistress, you may want a more robust charger.
Lots of companies make off-the-shelf DC-DC converters of the type previously mentioned, as well as AC switchers. The advantage of the AC switcher is being able to seamlessly use either. I usually do business with these producers:
www.vicor.com
www.astrodyne.com
IMPORTANT --
Keep in mind these types of supplies do not have any "gas gauge" or automatic cutoff circuits to prevent battery overcharge. They are primarily meant to service electronics needing DC or DC motors. I assume you're using lead-acid deep cycle batteries. If they are mounted aboard your boat where an acid leak from overcharge could "liquidate" the craft, I highly recommend you have an automatic cutoff with a charge gauge. This will cost a little more up front for the monitor circuit and control transistors, but is worth the investment in terms of the boat's seaworthiness (read:"insurance premium"), resale value -- and your peace of mind.
While this application can be quickly met using ordinary car battery chargers, a sealed, solid state approach will fit a boat better.
Enjoy.
Warpdrive
RE: Circuit for DC to DC Convertor.
Where are you getting 200vdc from anyway? Just curious.
RE: Circuit for DC to DC Convertor.
I thank all of you for your contribution. I must say that I have gained very useful information from your excellent feedback.
Thanks and Joy to you.