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Abstract

A method of shaft power generation includes: a step of dividing mechanical power taken out from a main engine into two portions for respective systems; a step of inputting one of the portions of the divided mechanical power directly to a differential planetary gear mechanism; a step of inputting the other portion of the divided mechanical power to the differential planetary gear mechanism through a subsidiary generator, a thyristor or transistor controller and a thyristorized or transistorized motor, each of which has a capacity which is equal to a value obtained by adding a slight allowance to a value obtained by multiplying the capacity of a main generator by the ratio between, on the one hand, a value obtained by the difference between the lowest and highest number of revolutions of the main engine of the range within which the mechanical power therefrom is employed for power generation and, on the other hand, the highest number of revolutions, thereby combining into one the two portions of the divided mechanical power; and a step of driving the main generator at its rated number of revolutions by the combined mechanical power output from the differential planetary gear mechanism.

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