Abstract
It has become ordinary to provide a shaft generator with thyristor inverter on 2-cycle low-speed main diesel engine as an energy saving and lavor saving means. It was on M.S. Niels Onstad, a 130, 000 DWT motor bulk carrier, that such generating system was adopted first in Japan in a regular way. This ship's shaft generator has the output of 700 kW, and is driven by chain gears of the 1: 8 step up ratio. It was also a new trial in that ship to use chain as a driving gear of shaft generator. This driving system has been working successfully for about two years since the ship's delivery, and proved a reliable marine equipment. It is expected to be applicable to various equipments. This paper introduces chain driving system for shaft generator with thyristor inverter adopted on the Niels Onstad, and discusses matters to which consideration should be given in designing this driving system, including torsional vibration.
