ELECTRIC PROPULSION SYSTEM FOR SHIP

摘要

PROBLEM TO BE SOLVED: To provide an inverter-less electric propulsion system for a ship which directly supplies electric power generated by a generator to an electric motor for ship propulsion.SOLUTION: An electric propulsion system for a ship 1 comprises: a propeller 2; an electric motor 3 which rotates the propeller 2; a generator 4 which supplies drive voltage for driving the electric motor 3 to the same; a target value output section 5 which receives input of set rotation speed N of the generator 4 and outputs set voltage V to be target output voltage of the generator 4 after adjusting the same in a manner that applies predetermined boost voltage to output voltage, in a low rotation speed range, of the generator 4 calculated from the set rotation speed N; and a generator control section 6 which receives the input of an output voltage measurement value of the generator 4 and the target output voltage of the generator 4 and controls field voltage of the generator 4 so that the output voltage measurement value coincides with the target output voltage of the generator 4.