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Old 12-20-2011, 08:51 PM   #11
stevensj13
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Default Re: Car batteries... Will it work?

I figure I might as well ask here instead of opening another thread, if I apply 12 volts DC directly to the golf cart motor, would the golf cart move? I picked up a pretty nice one but no batteries and wanted to test the motor... Oh, and I have a bunch of electrical parts if anyones interested
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Old 12-21-2011, 05:50 AM   #12
yurtle
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Default Re: Car batteries... Will it work?

Quote:
Originally Posted by AirJunky View Post
The alternator would never charge as much power as the batteries consume. So at most it would just lengthen the time till the batteries died.
It wouldn't even do that, because the alternator would cause more drag in the form of mechanical energy, than it would give back, in the form of electrical energy.

Remember conservation of energy, energy can neither be created nor destroyed, but it can change forms, though with losses, you always lose some.
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Old 12-21-2011, 06:43 AM   #13
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Default Re: Car batteries... Will it work?

[QUOTE=stevensj13;663611]..........if I apply 12 volts DC directly to the golf cart motor, would the golf cart move?.............../QUOTE]

Maybe so, maybe not. If you jacked the rear wheels off the ground, they might turn, but actually moving the cart is iffy.
If the motor was completely unloaded (IE: sitting on a workbench),12VDC would spin it.

Also depends on whether it's a series wound or sepex (shunt wound) motor.
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Old 12-21-2011, 10:39 AM   #14
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Default Re: Car batteries... Will it work?

I would think running an open-ended motor on a benchtop would cause damage because of a lack of support on the armature. Better to leave it attached to the differential and test it while still in the cart.
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Old 12-21-2011, 12:06 PM   #15
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Default Re: Car batteries... Will it work?

Ooops.
My bad - I was thinking electrical rather than mechanical.
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Old 12-21-2011, 12:22 PM   #16
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Default Re: Car batteries... Will it work?

Just a casual observation......but this all sounds much to difficult to even do. And besides, if it were even close to "do-able", I would think that the brain trust at one of the cart companies would have done it some time ago.

Dave
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Old 12-21-2011, 02:40 PM   #17
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Default Re: Car batteries... Will it work?

The closest we will get is regen braking.
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