I'm Stuck

[Ding123]

I have a weed- eater . It has brushes. I have tried to get power out of it but have not been sucessful .Could some one please advise me which way to wire it, in "layman's terms",please.I just would like to know if it is possible to get power out, without having to put power in.I would really apprecated any help you could give me.

Thanks, guys

.

[Norm]

  Not enough data....is it 110 volt or a cordless?

  Even if it is a cordless you have to spin it

pretty fast to get a couple of volts from it.

                ( :>) Norm.

 

[maker of toys]

mmm. . . if it's a 'extention cord' type unit, it'll have a 'wound field' (coils on the stationary part of the motor, not just the rotating part) and you are pretty much wasting your time trying to generate power by spinning it.

if it's a 'battery' type, you'll need to turn it about 10,000 rpm to get battery voltage out of it, and you're likely wasting your time trying to generate usefull power by spinning it.  you could try pressing the motor shaft against the tire of a 10 speed and pedalling fast. . . .

if you see a theme here, it's that weedeaters don't often make good generators.

try a treadmill motor instead; you want a low-rpm 'PM' motor. (pm = permanant magnet)

[Nando]

DING123:

You need to tell us if the stator has wires ( winding) or not, and how the stator is built, like two big 1/2 donuts or what, also the number of commutator cooper.

slots.

Most of these type of motors of recent design do have ceramic magnets in their stators and most are two poles total and he number of commutator slots make then high RPM, in the area of 3400 - 4800 RPM to be able to generate the 10 amps power.

I tried one about two years ago and started to produce power ( 15 volts) around 2200 RPM -- around 100 watts.

The life of these motors is atrocious, about 1000 to 1500 hour life -- that is about one hour once a week -- which the impression that it last for many, many years.

I do not recommend such motor for energy producing -- they are worthless in my point of view.

Nando

[Ding123]

Thank you for your responses.I appreciate the input....thanks for answering my questions.