GB190719424A - Improvements in or relating to the Electrical Propulsion of Marine Vessels. - Google Patents

Abstract

19,424. Mavor, H. A., and Biles, J. H. Aug. 29. Drawings to Specification. Cranes; winches.-A turbo-generator plant is employed for supplying the power to several motors driving the screw propeller shafts of cargo vessels. The generating-plant is subdivided in separate units adapted to supply the current to the operating- motors of the propeller shafts or the auxiliaries, such as the cranes, winches, &c., the units into which the generating-plant is divided being proportioned in accordance with the requirements of the different operating-motors. One of the units, smaller than the others, may be used, in the event of the failure of a larger unit, to propel the vessel at a reduced speed or to operate the auxiliaries, the normal periodicity of this unit being half that of the larger unit. The main units of the generating-plant may consist of turbo-alternators, while the smaller unit consists of a generator driven by a reciprocating engine, and capable of supplying either direct and alternating current or direct or alternating current, so that the auxiliaries may be driven by direct current. A particular example described in the Specification comprises a triple-screw vessel with the generating- plant divided into three sets, two of which supply current to a polyphase induction motor on each shaft and the third supplies current of a lower periodicity alternatively to the propeller motors and the auxiliaries. Specifications Nos. 8851, 11,183, and 12,072, A.D. 1907, [Abridgment Class Dynamoelectric generators &c.], and No. 12,386, A.D. 1907, are referred to.