Directly connect motor with charger

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Old 03-15-14, 04:59 PM
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Directly connect motor with charger

Can you directly connect a 12v dc battery charger to the motor instead of using a battery. I was thinking of using two alligator clips to connect the positive and negative terminals of the battery charger to the motor to power it.
 
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Old 03-15-14, 05:08 PM
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What motor are you referring to? Are you trying to start an engine or power a 12 volt electric motor?
 
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Old 03-15-14, 05:18 PM
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A charger will power a motor as you describe -- provided the charger produces more power than the motor requires. Don't expect a 10A charger to power a motor that requires 15A to run.
Another problem -- most chargers have half-wave rectifiers so you will be getting pulsating DC. You would need a charger with full-wave rectifiers.

RR
 
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Old 03-16-14, 12:23 AM
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Also, if I accidentally short circuit the battery charger, would that pop a breaker? There is a GFCI installed.
 
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Old 03-16-14, 12:40 AM
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bcbc...you really need to answer the questions asked...and provide more info...if you want accurate answers.
 
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Old 03-16-14, 05:30 AM
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GFCIs do not trip from an overload. Some chargers have built in overload protection.
 
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Old 03-16-14, 11:55 AM
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I'm trying to power a 12v electric motor with a 14v charger connected with alligator clips.
 
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Old 03-16-14, 12:07 PM
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Yes.... you've told us that already. Your motor will require a certain amperage to run it at 12vdc. The charger amperage needs to be higher than the motor or the motor won't run.

Also.... many car battery chargers don't put out true filtered DC and may not run a motor.
 
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Old 03-17-14, 07:38 PM
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I tried it with the motor and it worked!
 
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