Hello awesome minds,

I have a project that needs a nudge. I am attempting to turn a Capacitor-Start, Capacitor-Run Motor into a generator. I am finding it a real challenge to locate anything anywhere on the web about how well this can work. It feels as thought the capacitors, without power put on them, are acting as breaks. I want to ask - specifically- if I am trying to make a generator with the wrong system, motor. Should I use a motor with no capacitors at all?

Please adivise - Ruben

 

Follow the link to some information on generators - http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/genhow.html

You will see that the generator does not operate like an induction motor - http://www.allaboutcircuits.com/vol_2/chpt_13/9.html The induction motor uses an induced magnetic field to power the rotor. There is no physical connection, and therefore no way to give the induction motor rotor a magnetic field that will cause it to act as a generator.

 

There are people doing it with three phase motors. They modify the rotor, adding strong permanent magnets to the rotor.

 

You do not necessarily need a permanent magnet rotor. The asynchronous induction generator employs a rotor similar to an induction motor. In broad-brush terms, it is like an induction motor being forced to rotate at above its synchronous speed.

These things have attracted some interest lately, perhaps because of possible applications to small-scale power generation e.g. from windmills.

See the following link:http://en.wikipedia.org/wiki/Induction_generator

 

I went to the links... very good info. Thank you again.

So, what type motor would be the best to use for a grid tie in that will be powered by air. I have a mechanical prime mover with abundant air compression potential. I am trying to stay around 5hp because of the limits of my prime mover.
Thanks again- in advance.