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Electrolysis => Electrolysis => Our Alternator => Topic started by: CarbedNotch on February 13, 2008, 17:31:53 pm

Title: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 13, 2008, 17:31:53 pm
I'm thinkin about bolting a pulley on this thing and having the variable speed seems like it would be perfect.

(http://i75.photobucket.com/albums/i283/carbednotch/grinder.jpg)

What are ya'll using?
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 14, 2008, 04:01:30 am
that motor is 2 amps, what was it used for?

i am no expert, but that motor having such low amps tells me it cant be used to turn anything like an alternator, i could be wrong? the rpm's is good.

my motor is 1/3 horse 5 to 8 amps. what is 1/5 horse compared to 1/3 horse. my motor is just about as small as you can use. just be carefull and dont burn a good motor up!
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 14, 2008, 04:02:35 am
i dont think that motor will work, you will smoke it very fast! it looks to be a bench grinder, if this is true than it has no torq, i am only trying to save you your motor here!
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 14, 2008, 06:04:05 am
lol ya its a small grinder.
Amps needed to be higher like 10amps the only part i like is its variable speed.

What motor do you use hydro?
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 14, 2008, 06:10:04 am
i use a 1/3 HP 120 volts ac 50 to 8 amp motor. sometimes you can find these motors on squirl cage fans in old shops, most places that sell pulleys sell them. here where i live a good motor is 100 bucks a pop.

1/3 HP is very weak, but it gets the job done. i prefere atleast a 1 horse or even bigger, the rpms of my motor is 3500 rpms, but if your motor is 1800 rpm's you might can use a big pulley down to a small pulley to gain 3k at the alternator.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 25, 2008, 02:27:41 am
(http://i17.ebayimg.com/02/i/000/da/ef/0c18_1.JPG)


I just got this 1 1/2 hp 3,400rpm unit for $50

I cant wait to try it out!
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 25, 2008, 02:34:07 am
oh man you done good! i really like that motor!
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 25, 2008, 03:08:06 am
oh man you done good! i really like that motor!


yeessssss     ;D :D
Its got 2 different sized pulleys. One PULLEY IS 3" OTHER PULLEY MEASURES 2 1/2" DIAMETER.
(http://i24.ebayimg.com/03/i/000/da/ef/0d1c_1.JPG)
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 25, 2008, 12:23:54 pm
hrmmm, i would probably use the smaller one, is it much bigger than your alternator pulley?

thats about the rpm's my motor is, accept yours want slow down under load like mine does, :( im jellouse!
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 25, 2008, 16:13:58 pm
Look on e-bay there are lots of different ones to choose from. This is the only one I saw with 2 pulleys on each side though.
I got this motor shipped to my door $57   :P

I haven't gotten an alternator yet.  What would you say is the best one to go with?
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 26, 2008, 04:08:49 am
nice set-up. Whats that clamp holding the alt. initially used for?
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 26, 2008, 13:19:01 pm
The AC Delco alternators from GM cars from the '70's to mid-80's are the easiest to work with as you can easily take them apart to make your wiring changes. In addition, even with the core charge they're cheap. I recently bought one for a '78 Chevette (future H20 vehichle) and it was under $40 from Advance Auto. This is what I intend to use.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 29, 2008, 21:18:10 pm
I found a westinghouse 8.7A   1725 rpm motor , and a AC Delco alternator. the alternator needs rebuilt, but I was going to open it up anyway ;D. I may need some help on that wiring job .

Spike
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on February 29, 2008, 21:35:07 pm
you need a bigger pulley on that driver motor.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on March 01, 2008, 20:14:54 pm
(http://i75.photobucket.com/albums/i283/carbednotch/alt3phase.jpg)

I got this alternator from my '78 F-150.  Is this perfect or what?   Now I just need to figure out which wire goes where....
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on March 02, 2008, 00:00:00 am
thanks hydrocars, I'll get one this week. Try to get 3000 to 3500 at the alternator

Spike
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on March 17, 2008, 05:11:41 am
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..
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on April 17, 2008, 02:55:44 am
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
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on April 17, 2008, 02:57:57 am
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 
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on April 17, 2008, 05:49:59 am
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.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on April 18, 2008, 23:20:18 pm
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
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on April 26, 2008, 03:27:33 am
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.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on June 06, 2008, 20:38:37 pm
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.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on June 06, 2008, 23:47:16 pm

 Buy 2 adjustable pitch pulleys. You can vary the RPM's by widening or narrowing the pulleys, while they are still on the shafts.
Title: Re: Choice in the electric motor to run an alternator
Post by: Login to see usernames on June 16, 2008, 03:05:53 am
Quote
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.

You can purchase one of the 3 or 5 step pulleys like they use on a drill press. If you do that you may also want to consider using an idler pulley that you can adjust back and forth to tighten the belt. That way seems less expensive too but it has the draw back of a little inconvenience in adjustment while testing your circuit.