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AC vs DC Power

opus

Registered
Hypothetically; if I have a 5 hp engine and it will power an AC 120v generator that will give me say 13A.

Now if I take that same setup but with a DC powered 12v generator, will it take less hp to deliver 13A DC?

Boy, I hope that makes sense.

:eek:
 

AngolaGravely

Registered
Re: AC vs DC

Hypothetically; if I have a 5 hp engine and it will power an AC 120v generator that will give me say 13A.

Now if I take that same setup but with a DC powered 12v generator, will it take less hp to deliver 13A DC?

Boy, I hope that makes sense.

:eek:
12V @ 13A is 156 watts.

120V @ 13A is 1560 Watts.

A horsepower is roughly 744 watts.
 

Thaumaturge

In Memory Of
Age
68
Last Subscription Date
07/12/2019
Re: AC vs DC

Don't know if info will help much, but typical 12VDC "charger" outputs are powered off a separate, rectified aux winding. The current of such aux coils is limited by wire size of coils, rectifier size and circuit fuse or breaker.
Doc
 

G.M.Johnson

Subscriber
Last Subscription Date
11/05/8018
Re: AC vs DC

12vdc @ 13 amps you can get away with a lot less horsepower. A 1 hp motor will work just fine, but to give a little head room I would go with 1-1/2 hp. General rule of thumb is .75kw per HP.
 
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