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Old 21-04-2016, 08:29   #16
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Re: DC-DC Converters 24V to 12V

John,

What is the manufacture of your windlass? I have a 12 volt system but my windlass is 24 volt. This is not too big of a problem but I would much rather keep my systems all the same. My windlass is a maxwell, and the motor is a 2400 1500 watt. if your 12 volt motor matches up I would be happy to trade you straight across. I am just north of Ft Lauderdale.

Michael
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Old 21-04-2016, 10:20   #17
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Re: DC-DC Converters 24V to 12V

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Originally Posted by captmikem View Post
John,



What is the manufacture of your windlass? I have a 12 volt system but my windlass is 24 volt. This is not too big of a problem but I would much rather keep my systems all the same. My windlass is a maxwell, and the motor is a 2400 1500 watt. if your 12 volt motor matches up I would be happy to trade you straight across. I am just north of Ft Lauderdale.



Michael

It is a Lofrans Falkon we'd have to get pretty lucky for them to match.Click image for larger version

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Old 21-04-2016, 11:37   #18
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Re: DC-DC Converters 24V to 12V

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It is a Lofrans Falkon we'd have to get pretty lucky for them to match.
Possible, since the face plates come off (usually mounted with two long screws from the brush end thru the motor to the face plate).

Important thing would be the shaft diameter. Mine I believe is 17mm.

If you would like to pursue this, I can pull mine off and measure the motor housing where it mates to the faceplate, also make sure of the shaft diameter.

I also have the 24 volt reversing solenoid box. And... if you are interested I have a couple of very nice 24V large diameter circular brass florescent light fixtures and a couple of 24 to 12 volt converters.

Michael
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Old 21-04-2016, 11:54   #19
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Re: DC-DC Converters 24V to 12V

As deblen suggested - I would probably install a 12v battery as close to the windlass as possible. I'd use a standard sized 12v deep cycle battery (eg Group 24) so it could also be used as an emergency or second 12v source for your 12v stuff.

12v Chargers that run from 24v are available; a solar MPPT controller might also work here.
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Old 21-04-2016, 14:58   #20
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Re: DC-DC Converters 24V to 12V

I noticed that you listed an Icom 802 as one of the items to run on the 12 volt side of the system, and that implies that you want to use HF communications at times. So, do be aware that many 24/12 volt converters are very RF noisy... enough so that it would defeat your attempts at HF comms.

I don't know if this issue is addressed in the specifications of the units that you are considering, but in your place I'd be doing some careful investigation before buying.

Cheers,

Jim
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Old 21-04-2016, 21:23   #21
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Re: DC-DC Converters 24V to 12V

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I hesitate to bring this up, but many, many 6V tractors etc, Ford's in particular were converted from 6V to 12V by changing the coil and replacing the generator with an alternator, and a couple of light bulbs.
Starter worked fine off of 12V, we had one my whole child hood.
Then there is also a "fast start" kit for turbine aircraft that takes the dual 24V batteries and connects them in series to 48V for faster starting, and although the starter-generator is 24V, it actually has a shorter run time and runs cooler off of the higher voltage.
www.airrepairinc.com/Fast-Start.pdf

I wouldn't be surprised if your windlass ran just fine off of 24V, going to run faster of course.
Worst case, it won't and you have to replace the motor.
You will still need to convert 24 to 12, but it's a lot cheaper if you don't have to do that high amperage conversion

As long as there is no electronics you can put 24v through a 12v motor, it will run faster.
You can't put 12v through a 24v motor.


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Old 22-04-2016, 01:46   #22
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Re: DC-DC Converters 24V to 12V

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As long as there is no electronics you can put 24v through a 12v motor, it will run faster.
You can't put 12v through a 24v motor.
Not sure this is a good advice. I made a mistake in my earlier post, feeding this 12V windlass with 24V will not double its power but quadruple it ! (because doubling the voltage allows the motor to pump twice the current)
Well, this is all theoretical but I bet doing that will break something very very quickly.
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