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Weight of wind power generators

Posted: Oct 12 2020 8:41am
by Noob0123
Hi.
I am quite curious why are wind power direct-drive generators so heavy? A 10 kw one can weight up to 100kg.
Is it because they have to be wound for extremely low kv?

But permanent magnet ones are essentially bldcs (for instance, ebike hub motors).
The rpm difference there is just x3. Yet they are ~20 times heavier.

Thanks! And sorry if this is a stupid question, I just couldn't find any explanation.

Re: Weight of wind power generators

Posted: Oct 12 2020 10:39am
by john61ct
Because they are designed for decades of continuous service

and stationary, no need for light weight as in mobile applications.

They do make light ones for recreational sailboats.