Really not a good idea to ever center tap a battery for 24 or 36 volts. Not even with the smallest loads.
James Lambden
Electroprop
6 Harbor Way #226
Santa Barbara, CA
93109
On Jun 27, 2014, at 6:47 PM, "Chris Hudson clh5_98@yahoo.com [electricboats]" <electricboats@yahoogroups.com> wrote:
Another good thought. Only be using it for a few minutes normally. My 48V bank is in the engine room of a 41' center cockpit sailboat. I was thinking 48V would also allow me to run the smallest wire from there all the way up to the bow.Chris
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On Jun 27, 2014, at 15:30, "oak oak_box@yahoo.com [electricboats]" <electricboats@yahoogroups.com> wrote:Can you really not tap off the 48V battery bank at 24 or 36V?It's not ideal, but hopefully you wouldn't need to run the windlass long enough to drain half the bank.From: "Chris Hudson clh5_98@yahoo.com [electricboats]" <electricboats@yahoogroups.com>
To: "electricboats@yahoogroups.com" <electricboats@yahoogroups.com>
Sent: Friday, June 27, 2014 6:27 PM
Subject: Re: [Electric Boats] 48V Windlass
Mark,Thanks. I'd like to eliminate the need for more batteries.Chris
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On Jun 27, 2014, at 15:21, "Mark F mark.internet@yahoo.ca [electricboats]" <electricboats@yahoogroups.com> wrote:1500 watts at 24 volts would be 62.5 Amps.Would take a few DC/DC converters.Possibly you could use the DC/DC to charge a small battery for the windlass.Maybe some Dcell sized NIMH or Lipo batteries.I beleive you can pull 10C out of most batteries. So 6 Amphr batteries would probably provide the current (60 amps).The question would be how long do you need to use the motor and how much time is available to recharge.just one ideaFrom: "clh5_98@yahoo.com [electricboats]" <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Friday, June 27, 2014 4:05:32 PM
Subject: [Electric Boats] 48V Windlass
Hi group, My 12 volt windlass motor went out and the whole unit is not worth fixing. I've been researching new ones. I've found a couple manufacturers that make ones that run on 24V and 32V. That got me thinking, I've got this huge 48V propulsion bank at my disposal. I called Ideal Windlass and they are checking with their motor supplier about a 48V motor. I believe they are DC series motors. If I can't get a 48V windlass, could I step down my 48V to 32V or even 24V? We are talking around 1500 watts. I'm wondering if I could parallel a few DC/DC converters, if they could handle the inrush. Is there a simpler way? Thanks, Chris
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Posted by: "james@electroprop.com" <james@electroprop.com>
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