A Δ-Δ connected transformer bank is converted into a V-V (open delta) connected transformer bank. The ratio of the VA rating of the V-V connected transformer bank to that of the original Δ-Δ connected transformer bank is approximately:

Which design feature is primarily associated with the rotor of a high-speed turbo-alternator to handle centrifugal forces and minimize windage losses?

In a Doubly-Fed Induction Generator (DFIG) used for variable speed wind energy conversion, the stator is connected to the ________ supply and the rotor is connected to the ________ supply.