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Would this work? | 9 comments (9 topical, editorial)

Re: Would this work? (3.00 / 0) (#1)
by Flux on Tue May 13th, 2008 at 12:52:24 PM MST
(User Info)

What do you want to do with it?

Just a 3 phase induction motor, obviously intended for a vf drive. Presumably 8 pole with fairly high slip.

Do you propose to convert it to pmg at enormous cost and effort or are you hoping to self excite it as an induction generator. In which case you will need a lot of expensive capacitors and the results may be questionable. High pole number motors make poor self excited generators.

Chinese alternators are so cheap that this would be a questionable proposition for anyone not looking for a project.

In general motors are best used as such and if you want a generator buy one especially at such large sizes.

Flux

Re: Would this work? (3.00 / 0) (#2)
by martin1 on Tue May 13th, 2008 at 03:20:06 PM MST
(User Info)

It seems like this thing can be used both as a motor and as a generator.

[ Parent ]

Re: Would this work? (3.00 / 0) (#5)
by Flux on Wed May 14th, 2008 at 12:14:50 AM MST
(User Info)

Yes looking at the second plate it implies that it may have been used as a grid tie generator.

Any induction motor will generate if driven above sync speed when connected to the grid.

For a stand alone generator you need to supply the magnetising current by capacitors and it is a less stable situation.

If the speed rating is as a generator then it may be 10 pole, you would need to do a bit of investigating to be sure. Not sure why the motor and generator plates have the same speed.

Build yourself a 130kW wind turbine and grid tie it.

Flux

[ Parent ]

Would this work? | 9 comments (9 topical, 0 editorial)

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