Are mechanically powered DC generators available for purchase??? If so, where?

Question

I have a need for a mechanically powered DC generator. When looking for vendors online most(or all) products are coupled with a motor. Since I'm looking to convert already existing rotational energy into electrical energy, I do not need the motor.

I have a need for a mechanically powered DC generator. When looking for vendors online most(or all) products are coupled with a motor. Since I'm looking to convert already existing rotational energy into electrical energy, I do not need the motor.

Looking for 10kW of power.

Answer 1

Would help to know what power you need......
I mean, you could use a bicycle dynamo, or one of those hand-cranking gadges which charge cell phones, if you only need 5 Watt or so....

Answer 2

Check with W.W. Grainger, or G.E., Westinghouse etc. But what you want is not a generator per se, but an alternator-rectifier design as it is much more efficient and with its popularity for the last 40 years, probably even much cheaper than a generator, unless you have a very design specific application where only a generator is allowable due to interference of some sort that could cause damage to the diodes and electronics in the rectifier.

Answer 3

Large DC motors over 10 horsepower would work for you.
A kw is about 1.3 horsepower. People building electric cars use motors in the 10 -20 horsepower area.

Answer 4

How large and what power?
Somehow I think the ones below are *NOT* what you mean -- they are quite small, but was the best I could do! Sorry, hope you find what you are looking for.

Answer 5

You do not say what sort of power you are looking for.
Most people would use an alternator and rectify the output, it is more efficent and cheaper.

Answer 6

you did not say at what voltage. however elevator motor generators are about that size

Answer 7

Yes you could, many heavy plant dealers will have it stock