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Old 09-24-2015, 11:41 AM
mbrownn mbrownn is offline
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Join Date: Jan 2011
Posts: 1,637
I think many miss a few points on motor/generators

If you have a motor of 70% efficiency bolted to a generator of 70% efficiency your overall efficiency is 49% efficiency. With the right design and by placing the generator in the motor case and sharing an armature, it is possible to produce an overall efficiency of 70% without improving the individual components. Why? We only have one set of bearing, windage and iron losses to deal with.

Of course with better designed components it is not so difficult to achieve over 90% overall efficiency for the same reason.

If you speak to motor manufacturers, some motors will give an "apparent overunity" when operated under pulse width modulation and under certain conditions, although they insist it is only "apparent". Would a suitably designed motor/generator also give this "apparent" overunity?

The next point is that transformer actions take place between coils in such a device, with the exception of an induction motor and in inductive compensation, we try to minimize these effects. What would happen if we tried to exploit them?

Just a little food for thought
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