magged out rotor

[hiker]

had this little motor laying around for quite awhile-so-i tore it apart made a new rotor for it--first i only used four mags--worked okay--high volts--hooked up a 11ov light bulb 150 watt -lite it right up..looked at the rotor again and decided to add 4 more mags --totalle of 8 mags--with hard drive mags topped off on some of them..

big diffrance in power..well thought i might try it on my little briggs and strat engine--tore off my car alternator that i had hooked to that and installed the new minnie alt..works great for lights and even powers my hand drill with ease..

the motor only has to run at idle for lights and just a hare more to power the hand drill.. beats the heck out of my old honda gen that had to have high rpms to do dam near anything..

i tried the alt in both delta and star[has hook ups for eather one]works best in delta..if nothing else its a good little gas mizer light plant and electric hand tools--so far ive only had two 150watt light bulbs hooked to it[300watts]

its kind of hard to run the drill at the same time with lights hooked up keeps on blowing out the 150watt bulbs every time i turn the drill off..

still have to try it with 12v headlamps[50watts]--mine are all burned out...

now i dont no what to do with it --make a windgen out of it or a back up gen..

ps: its powered with ceramic mags--half the rotor has hd mags on top of the ceramics.

[hiker]

the motor is 240v[made in italy]  and i think it has 3 sets of 4 coils--plus two small coils- one on each side..found a 12v headlamp[50watt] for it-when i went to start the engine with the rope start it got fairly bright just by pulling on the starter..so i canceled the start..

need some kind of voltage reg. for it..well thats how my evening ended..later.

[zubbly]

Hey Wild!

induction motors make great little gennys don't they  

noticed the offset of mags on the rotor.  Any cogging?

have fun

zubbly

[electrondady1]

hello hiker, i'm starting to get more and more interested in these motor conversion generators. they seem so easy to do compared with  a dual rotor pma. my guestion is about balanceing the modified armature. you've got all kinds of different mags and configurations on that rotor. how much do you need to fuss over the balance. ??

[hiker]

i  guess it does look like a ragtag rotor--but its balanced out fairly well--no bad vibs..and like i said -it turns at a low rpm..dont know what would happen if i jacked it up to 3000rpm--i dont think even the 2ton rated epoxy i used would keep it togeather..even with the hand drill it lite up the 150watt 110v light bulb..

still have to do some more 12v tests on it,,might be a good wind gen with some light weight plastic blades on it..hits 40v just turning by hand..get a nice little jolt when you hold the wires in your hand..could always heat water with it--that is if they make a 300w to 400w heating element[110v]--dont know the limit on this alt yet..

i guess when it goes kerbang that will be it!  any way for its small size i was surprized at the output of it...............

[hiker]

hey zub--no serious cogging to speak of--you can feel the mags go past the lams when you turn it by hand..turned out to be a nice little gen-for its size..

might hook up a little weedeater motor to it for fun..or some plastic blades, for wind.

[electrondady1]

well, i like the kind of road warrior look its got . and it makes power. would it live at say,1500rpm?

[hiker]

it should handle at least 1700 rpm --when i had the drill and lights going it took a little more power--and of course i didnt turn the lights off before the drill and the extra rpms blew the lights out--the motor wound up some what when that happened--not sure what rpm it could handle,, jerry or zub might know the answer to that..

i guess it all depends on what kind of glue you use and the way its constructed..

[zubbly]

hey hiker!

1500 rpm eh.

i have had some gennys doing 1500 rpm or better.  One of them did throw a mag. The rotor was encapsulated with fibre glass resin. examination of the rotor showed that the resin had very poor adhesion to the mags as well as the surface of the turned down rotor. basically i used the fibre glass resin to cut down costs from using epoxy.

the epoxy in my opinion is superior. also suggested to me by a few is to wrapp a very thin layer of carbon fibre thread over the top and apply some resin. this would be excellent.

other options that some manufacturers are using is to have a very thin strip of stailess steel strap secured around the mags and rotor. the strap will live in the air gap between the mags and the laminations of the stator. the strapp i would suggest about .015 inch thick.

hope this helps

have fun

zubbly

[nanotech]

"could always heat water with it--that is if they make a 300w to 400w heating element[110v]"




Block heaters for cars are in this range. Also an advantage that they are designed for water!!