Why there is no CSD between the electrical generator mounted on the APU and aircraft electric buses?

Electric generator, you should be able to keep an eye: question : Why is there no CDD between the electric generator of the APU and aircraft electrical buses installed An airliner fitted electric generators and motors. These generators produce alternating current. Before this current fed into the aircraft electrical bus will continue through a constant speed drive (CSD) for the ongoing stabilization. Top Answer (APU = Auxiliary Power Unit): response from RickH engines, by necessity,

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