new motor

[97fishmt]

Well its time to get started again on another unit.

I really am addicted to going further and further.

I watch the brushless servo motors on ebay and sure

enough one came to my door today. WOW brand new in

the box what a score. Will make a nice 600 watt machine.

I have a collection of rotors but time to start carving.

This one I think will need a little less speed and more

torque, so maybe 10' and more drop. My welding skills are

getting better and I feel better about going for the tilting  

tower base myself.  I did not trust my skills so much before

and did not know where to turn to get it done.

Thanks to all that share here and for a place I feel

right at home.  You folks are like part of my family. Thanks!

[97fishmt]

Here is a picture

[jzeveney]

That's a big DC motor I think what are your plans for it?

Z

[Old F]

Nice looking motor what is its rated RPM ?

When people ask  me if I know what I am doing

I just look them in the eye an say heck no hasn't stopped  me in the past an wont stop me in the foreseeable future  :  )

Old F

Having so much fun it should be illegal    

[97fishmt]

Hey F and Z

This is another Ac servo motor.

Nice ebay find $35.00.

70. pounds of copper and magnets.
    
0. 2 Ohms resistance in the windings,
   
80. vrpm, 33amps. It will work well for
    
    

my 12volt system.  This is about half

the size of the one I use now! I just

can't resist when they go for so cheep.

One of these days I'll just have to say

O.K. to the nice 18kw ones close to 400

pounds. This is the pma I use now 9kw motor.

[97fishmt]

Whoops!  That should be 80v/krpm.

So 12.5v @100rpm. (1000/80=12.5)

O.K. so 12.5*1.4=17.5  

17.5volts @ 140 rpm. Diodes

and line loss  should get me close

to good charging voltage at the batteries.

You can see this is low for cut in. Thats

why I think a big slow machine is here for

the making.  I do the furling just like the other

machines here, I just don't have to build the

alternator, and its totally sealed.

[97fishmt]

Now that I think about it, This will probably

make a better unit for a 24volt system.

12.5*2.6=32.5 so: 32.5 volts @260 rpm seems

more normal. Oh well that will make it 1200 watts

or more.  I play with transformers and higher voltage

machines as well. I just want to find the nice slow

and tame with my winds. Like I said I am addicted!!

[coldspot]

97fishmt-

 Cool, very nice E-bay score!!

 "70lbs of copper and magnets."

 AC servo motor

Very close to my

 "28lb stepper motor", 28 pounds of copper and magnets. Cost $0.99 plus $22. shipping ! LOL  

 Makes way more than I can handle yet so I'm flying it blade less on a normal pipe over pipe with side furling as normal. (Waiting for better tower and over voltage controls)

 I've done a little testing with E-bay 86.5" fiberglass blades and improved ceiling fan blades at about 4'. MORE tower needed!!!!

 

[CmeBREW]

Very nice looking and tough motor .  I wish I understood about those type motors!!!

I have NO idea how a Brushless AC(??) Servo motor works??. (or the volts to rpm rating would be)

Are there Actually big ceramic magnets inside the motor for the field??

I don't fully understand the rating numbers that you gave. (volts/rpm)

Do you happen to have a photo of the ratings label on the motor up close?

Sure sounds like those type motors 'kick the booty' of normal PM DC motors as mills.  Before seeing your post, I USE to be very happy to see 7 amps in big wind from mine. Now, I sorta feel alittle ashamed, confused, and disgusted!

[97fishmt]

Hey,

How did those blades work?

Have you tried to carve any out of wood yet?

It is like they say, you can get away with a lot.

I made some out of some bed slats once, and man

I still use them on my 99v amatek motor and get

a good 30 amps out of them with no twist at all.

Just airfoils on the back and about 5 degrease of

angle into the wind. Cool, Thanks for saying Hi.

[97fishmt]

Hi, look at some of the other things I

have posted. I took one apart one time

and showed the neo magnets and the name

plate.That one just had a coating on the

windings so you could not see wire gage.

These motors are just 3phase alternators

just like they build here on the board.

All you have to do is add diodes to charge

a battery.  Look for more amps if you are

looking for good power.

[97fishmt]

I should be a little more specific.

It does depend on the winding of the motor you

are looking at. If you want to use it to generate

power, the voltage and ohms and amps are what you

want to look at, and what you want to get out of it.

I am not qualified to give advice, but if you can

experiment fairly cheaply then why not try to find

the holly grail, eh!

[coldspot]

97fishmt-

 Hi, again,,..  

"How did those blades work?"

which ones?

 The ceiling fan ones failed again, the mounting arms that is.

 The F/G ones are great, maybe a bit more that the stepper can handle. The ceiling fan ones could still

just barley turn it shorted out in winds over 13 mph. I'm planning on using them on a 2HP conversion.

Also testing an 102" set on it also, if I ever get it into action.

 "tried to carve"

Well, I've started a small set,(6') but just can't get myself to go any farther, being that I have two 86.5" sets and the 102" set.

 I lack a real tower still but, I'm getting closer.

How long are your ones on the Ametek? Also how many?

[97fishmt]

Yes I just did not wont to write out fiber glass

They work good huh?  The small windmill is a 99v

with 6' blades here.  Thats all I can get on this

little test tower.  It is on like a cliff or drop-off.

Good wind if it comes from the right direction.



With a belt sander I made these blades in about 2 hours. Hub and

mounted on the stand in about 3.  

[CmeBREW]

Thanks 97fishmt,

     That will give me something more to study on over the months.  Sounds like a lot of fun and payoff. I wonder if a 10' diameter set of 3 blades has any problem in low wind getting over the strong cogging of such a strong neo stator motor??  Inotherwords, is the cogging bad?

[97fishmt]

Hi, there is now cogging with these motors.

They turn just like a car alternator.

They have the magnets skewed on the armature

and the 3 phase winding in the case.

I hope just to pass it on. I see so many

people trying the tape drive and treadmill

motors, when they could go into the real thing

for about what they are spending, and wont be

disappointed like they will be with a brush motor.

[CmeBREW]

I never knew that. That is surprising and Very good.   Thanks for sharing the experience and info.  

[97fishmt]

I meant No cogging.

[97fishmt]

Wow!!  What was that all about??

I thought you guys would bust me on that math.

I don't know why I was trying to divide 1000 by 80

to get 12.5  That is something totally different.

To excited I guess and I should not go to all this

trouble to confuse everyone else.

Back to the 80 volts for 1000rpm. That means 8 volts for

100rpm.  So 16 volts for 200rpm. Damn! I new I was loosing

my mind, I guess I'm just not sure of it yet.

[coldspot]

 97fishmt-

 And everybody else

 "They have the magnets skewed on the armature

and the 3 phase winding in the case."

 Thats what I've been trying to say about my

"CMI",(Controlled Motion Inc.) Stepper Motor !!!

 But when I posted about it and showed pictures of the inside,

("http://www.fieldlines.com/story/2006/2/25/17110/5246") somebody posted back that those can't be magnets or they would be stuck to the tape I used in the picture. Hey, I was the one holding the tape and camera. I know how hard I had to pull on the tape to get it to NOT get pulled to the magnets.

 When you turn its shaft you do feel the steps but it is very soft and less than a few oz's of pressure to get past the steps.

 I don't know if its any better than a Ametek or not but I do know that it has no brushes to replace and was right in the price I paid for my 30 VDC Ametek, ($20. Vs $25.)

 Someday I'll be able to post some real info with all the V's & A's so watts will be able to be seen.

 Someday, with a real tower and blades, I hope this year!!!!

$0.02

OK,OK I know that was only a very lucky buy but, don't count out these types of things,

Steppers and servos

thats all

[97fishmt]

Hi coldspot,

I have seen that type of motor in researching pm motors.

Its a cylindrical magnet. I've never seen one or not quite

sure if I remember how the north and south poles are set up

on them.  For stepper motors I thought they had the windings

on the armature and the magnets in the can like a f/p motor.

I'm glad to hear from someone a with similar interests.