A transmission system?

[hvirtane]

If you'll connect two similar

three phase permanent magnet generators

together so that each phase lead

from the first generator is connected

with the same phase lead of the second

generator, the second would work

as a motor, if the first one is turned?

If that works well, it might make

a good electrical transmission

system with minimum parts?

But how big would be the losses?

- Hannu

[dinges]

Yup, I think it should work.

You've basically built a 3phase transmission system, instead of the simpler single-phase one (generator--wire--motor). Don't know why you would do this though. There are excellent 3-phase motors available, though this is is for 380V.

No idea on losses. Mechanical-->electrical conversion; then electrical losses; finally electrical-->mechanical conversion. Using a wet thumb; 60-65% efficiency? (from mechanical to mechanical). Just guessing here.

You have any specific application in mind or are you just wondering?

Peter.

[hvirtane]

"You have any specific application

in mind or are you just wondering?"

It might make a good transmission system

for pump for example. No mechanical

parts needed and no batteries needed.

- Hannu

[Flux]

You would need to devise a way to start it. Synchronus motors are not normally self starting.

It may start from standstill with no load but it will not start if you connect it with volts being generated.

Flux

[WXYZCIENCE]

A similar principal is use on diesel electric locomotive. This allows high torque to start the train under heavy loads. Joe

[ghurd]

Wouldn't this simply be a 3 phase brushless motor being driven by a variable voltage and frequency?

G-

[hvirtane]

My idea is to use it

with a wind machine.

It might be the easiest

way for the transmission

of a pump on the earth

or underground.

At any time the pump

would run at the same

speed as the wind rotor.

What about using an

induction motor?

Has anybody tried,

if a permanent magnet

generator can start

an induction engine?

- Hannu

[Flux]

No basic problem with an induction motor except that in most cases the frequency is awkwardly slow. At least it doesn't have the starting problems.

Flux

[sahlein]

Some very early traction motors for electric trains were tried using brush motors 16 Hertz to cut down on brush arcing.  Must have been like oversized "universal" motors like a drill that runs on ac or dc.

Joe S.