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Found New motor Is it any good?
By hyp7, Section Newbies Posted on Sun Oct 5th, 2008 at 06:26:06 PM MST
Help

I got a Leeson Washguard design 90vdc motor.the tag states it is 90volts, 5amps, 2500rpm, will this work for a jennie mill? If im thinking right the rpm is to high. So is there a max rpm to not go over when looking for a motor?
thanks Hyp

Found New motor Is it any good? | 4 comments (4 topical, 0 editorial)

Re: Found New motor Is it any good? (3.00 / 0) (#1)
by LarryDalooza (larrydal(two o here)za(at)yahoo(dot)com) on Sun Oct 5th, 2008 at 02:20:52 PM MST
(User Info)

I usually look for rpm/volts and look for the closest thing to 10... nothing over 25 for me... I have a 3000 rpm 130v (at 13 amps) which gets me to the number 23. which is 13v at 300 rpm... Still trying to better that.

Lar.
More inclination than time.

Re: Found New motor Is it any good? (3.00 / 0) (#2)
by kurt on Sun Oct 5th, 2008 at 03:54:32 PM MST
(User Info)

if its 90v motor and you want it for 12v charging you are looking for a 1750 to 1800 rpm motor to figure this out take the nameplate rpm divide that by the nameplate voltage then multiply by the voltage you want to cut in at like 12 or 24 volts you are looking for a number between 200 and 300 for most reasonable prop sizes for a 4' prop you could go as high as 350 if you make a fast prop for it but don't count on some crappy pvc blades doing the trick. larger the prop slower the cut in speed has to be.

http://www.reresource.org/

IRC

Re: Found New motor Is it any good? (3.00 / 0) (#3)
by hyp7 on Sun Oct 5th, 2008 at 04:10:05 PM MST
(User Info)

thanks for the replys. I was going to make my own blades out of pvc. My Math says It will be around 361 rpms. Is that possible with certin blades?
thanks for the help

Re: Found New motor Is it any good? (3.00 / 0) (#4)
by ghurd on Wed Oct 8th, 2008 at 12:01:12 PM MST
(User Info)

Quite possible. Not great, but possible.
Some of the Ameteks don't cut in until over 400RPMs, and there are a lot of guys fairly happy with the setup using 4' dia PVC.
I would try something more like 3' dia.
G-

[ Parent ]

Found New motor Is it any good? | 4 comments (4 topical, 0 editorial)

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