is the production of electricity from a stepper motor just one of the method?

[Mylinux]

is the production of electricity from a stepper motor just one of the
methods ?

I need to produce 12V~ 24V 50 W. can u recommend one?



I can't think the better English grammar for this question.

 

[Mylinux]

Hi Doug;



They work just fine.
They have permanent magnet rotors.
They are not much different in operation from
an alternator except they have many more poles.

can I connect the two different poles in serial so that 2.5 v + 2.5 v to
5.0v in serial?


we do not have a car called "Cadillac" or we will not think of production of
electricity.

I used a handdrill and put the turning pole of a stepper motor into the
handdrill head and use a led diodes to check positive and negative.

Although this would require a fairly large stepper motor.
I don't have any rules of thumb for designing these.

Duane

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[Ian Stirling]

I used a handdrill and put the turning pole of a stepper motor into the
handdrill head and use a led diodes to check positive and negative.

The stepper motor will output AC, not DC.
Any permenant magnet DC motor from your local auto scrapyard would be better.

 

[Robert Scott]

Yes, but it may need some careful wiring, and perhaps a rectifier for
DC output.

...of course, just like any alternator..

Most would produce multi-phase AC output when used as a
generator.

...If you connect only one winding you will get just one phase of AC.

A stepper motor normally uses an electronic controller to operate, and
a few models have that controller built-in. The electronic controller
must be bypassed to use as a generator.

Those are very few indeed. I have seen many stepper motors, but I
have never seen one with an embedded controller. That is not to say
such things don't exist, but there existence should not be taken as a
discouragement from using most steppers as alternators. I think the
efficiency of a stepper would be quite low compared to a conventional
alternator.

-Robert Scott
Ypsilanti, Michigan
(Reply through newsgroups, not by direct e-mail, as automatic reply address is fake.)

 

[Peter Lowrie]

Electronics World or Silicon Chip or Everyday Practical Electronics - I cant
remember which one, ran an article about using stepper motors for
generation. Time to go to the library.

Peter Lowrie

 

[Gerry Schneider]

..If you connect only one winding you will get just one phase of AC.

For a unipolar stepper (5 or 6 wires), 6 diodes suffice to convert the 2-phase AC to
rectified DC with reasonably low ripple - not as good as 3-phase, but not bad. I've used
steppers for years to produce small-scale DC at low RPM from slow-turning baby windmills
(vertical axis Savonius/Benesh style). For the particular 12 watt Airpax stepper I used
(a 10-year-old low-cost type, not as good as modern high-efficiency steppers), I get
about 5 watts out with reasonable efficiency and up to 15 watts (air-cooled with high
winds. So far, all of the failures have been bearing-related, since I lazily let the
motor oilite bushing support the lightweight windmill structure (1 top, 1 bottom). All in
all, I've had decent luck with the setup - makes a nice alternative to small scale solar
for powering remote instrument packages and communications.

Gerry