15kw motor as generator?

[Michael C]

I friend of mine came across a couple of nice looking 15kw 3 phase electric
motors. He's also got a small turbo 3 cylinder diesel engine. If we join the
2 up will electricity come out the electric motor? If not is there some way
to get it so it will?

Thanks in advance,
Michael

 

[Mauried]

On Sun, 1 Jun 2008 10:56:25 +1000, "Michael C" <mike@nospam.com>
wrote:

I friend of mine came across a couple of nice looking 15kw 3 phase electric
motors. He's also got a small turbo 3 cylinder diesel engine. If we join the
2 up will electricity come out the electric motor? If not is there some way
to get it so it will?

Thanks in advance,
Michael

Most unlikley.
Modern 3 phase motors are induction motors which means they have a
solid rotor , which turns in the rotational field caused by the 3
phase current on the stator windings.
They wont work in reverse as there is no magnetic field present in the
rotor.
No easy way to convert either, unless you can find a permenant magnet
rotor which will fit in place of the solid rotor.

 

[Phil Allison]

"Mauried"
"Michael C"

I friend of mine came across a couple of nice looking 15kw 3 phase
electric
motors. He's also got a small turbo 3 cylinder diesel engine. If we join
the
2 up will electricity come out the electric motor? If not is there some
way
to get it so it will?


Most unlikley.
Modern 3 phase motors are induction motors which means they have a
solid rotor , which turns in the rotational field caused by the 3
phase current on the stator windings.
They wont work in reverse as there is no magnetic field present in the
rotor.
No easy way to convert either, unless you can find a permenant magnet
rotor which will fit in place of the solid rotor.

** Like " pissing through a keyhole " - it can be done - but why bother
??

http://www.otherpower.com/otherpower_experiments_motor_convert.html


....... Phil

 

[Bruce Varley]

"Michael C" <mike@nospam.com> wrote in message
news:4841f3c7$0$13945$afc38c87@news.optusnet.com.au...

I friend of mine came across a couple of nice looking 15kw 3 phase electric
motors. He's also got a small turbo 3 cylinder diesel engine. If we join
the 2 up will electricity come out the electric motor? If not is there some
way to get it so it will?

Thanks in advance,
Michael
Assuming them to be squirrel cage induction motors, Google on Induction

Generator. If you plan to run them autonomously, using capacitors, that's a
fairly chancy setup, stabilising the output voltage is difficult. If you're
supplementing an existing, reasonably stiff grid, then it's a lot easier.
The machine just excites off the grid and feeds power back in when it's run
above the synchronous speed.

I assume that you're thinking of 3-phase generation?? If single phase, then
there are other issues.

 

[Michael C]

"Bruce Varley" <bxvarley@weastnet.com.au> wrote in message
news:Fu6dnVLxs7R71N_VnZ2dnUVZ_gudnZ2d@westnet.com.au...

Assuming them to be squirrel cage induction motors, Google on Induction
Generator. If you plan to run them autonomously, using capacitors, that's
a fairly chancy setup, stabilising the output voltage is difficult. If
you're supplementing an existing, reasonably stiff grid, then it's a lot
easier. The machine just excites off the grid and feeds power back in when
it's run above the synchronous speed.

I assume that you're thinking of 3-phase generation?? If single phase,
then there are other issues.

I think I'm over the idea It sounds like a bit too much trouble. Better
to sell the motors and buy a generator.

Michael