Question on Hydroelectric generators

Question on Hydroelectric generators

Do hydroelectric generators use permanent magnets for inducing the electric current. If so how would these (I imagine colossal) magnets be constructed? If not permanent magnets then where would the electric current and energy from the electromagnet of either the stator or armature come from?

Submitted July 03, 2017 at 05:11PM by Jamie2718
via reddit http://ift.tt/2ujquAL

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Question on Hydroelectric generators

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