Choice in the electric motor to run an alternator

[hydro]

Carbed Feel free to im me anytime you need help,, i also replied to your video. any more problems please feel free to ask anytime..

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I found this very affordable driver motor at harbor freight.
(http://www.harborfreight.com/cpi/photos/04100-04199/04114.gif)
    * Horsepower: 1-1/2
    * Frame: 56
    * Shaft Diameter: 5/8"
    * Volts: 115 volt
    * Full load amps: 14.2
    * Phase: single
    * Enclosure: Open dripproof
    * No load speed: 3600 RPM
    * Reversible: yes
    * Service factor: 1.0
    * Weight: 29 lbs.

ITEM 4114-6VGA

$126.99

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Here is a slightly cheaper version but this one is only 1hp
1 HP POWER TOOL MOTOR

(http://www.harborfreight.com/cpi/photos/04100-04199/04113.gif)

Made in U.S.A.
Perfect replacement for table saws, lathes, bandsaws and other constant running machinery. Ideal for first time motor buyer. Comes with 8 foot power cord and easy-to-use on/off switch.

    * Horsepower: 1
    * Frame: 56
    * Shaft Diameter: 5/8"
    * Volts: 115 volt
    * Full load amps: 12
    * Phase: single
    * Enclosure: Open dripproof
    * No load speed: 3600 RPM
    * Reversible: yes
    * Service factor: 1.0
    * Weight: 24 lbs.



ITEM 4113-5VGA

$117.99 

[hydro]

i like the first one... there is 2 ways to get 3k rpms on that alternator, the first is to use a 3k driver motor and 1:1 pulley ratio,, the second is to use around an 1800 rpm motor and use about slightly bigger pulley on the driver motor and a smaller on the alternator,, i have not tested the 1800 rpm yet.

[fonz]

i like the first one... there is 2 ways to get 3k rpms on that alternator, the first is to use a 3k driver motor and 1:1 pulley ratio,, the second is to use around an 1800 rpm motor and use about slightly bigger pulley on the driver motor and a smaller on the alternator,, i have not tested the 1800 rpm yet.

hi

I can send you a picture of a motor that I have wich goes to 2700rpm and on the motor is a litel stick with which you can control the speed and the side of rotation (left or right) I will take the picture tomoorrow and postit to you

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Hey everyone. Im kind of new to this, but have been reading alot of info. One motor I came across that I think would be good is a treadmill motor. I just aquired one. It is 2.25hp at 130VDC and it outputs over 7000rpm. The motor is a varible speed motor and comes with all the gadgets to make it work. With some tinkering you could possibly dial it in perfectly to the right rpm. Im going to give it a try. I will update you guys on my finding.

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What is the best approach for the individuals who do not have variable speed driver motor to regulate the rpms?
The full on, full off deal is killing me.

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 Buy 2 adjustable pitch pulleys. You can vary the RPM's by widening or narrowing the pulleys, while they are still on the shafts.