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1. (WO2017149588) SHIP PROPULSION DEVICE AND SHIP PROPULSION METHOD

Pub. No.:    WO/2017/149588    International Application No.:    PCT/JP2016/056007
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Mar 01 00:59:59 CET 2016
IPC: B63H 21/17
Applicants: NIIGATA POWER SYSTEMS CO., LTD.
新潟原動機株式会社
Inventors: KODERA, Masanori
古寺 正識
TAKEI, Koji
竹居 浩二
TASHIRO, Shinji
田代 信治
SHIRAISHI, Koichi
白石 浩一
HATAMOTO, Takuro
畑本 拓郎
Title: SHIP PROPULSION DEVICE AND SHIP PROPULSION METHOD
Abstract:
[Problem] To stabilize the rotational speed of an engine generator in a ship propulsion device that is capable of electric propulsion. [Solution] A ship propulsion device 1 that has: an engine generator 4; a propulsion motor 9; an inverter 8 that performs torque control on the motor; a deviation limiter 16 that controls the deviation between the actual value and a target value for motor rotational speed to a prescribed value or less; and a PID regulator that computes a torque command value such that the deviation decreases and that outputs the torque command value to the inverter. Parameters for the PID regulator are set as appropriate, and the response speed of the inverter is matched to the response speed of the engine generator. Variation in the power supplied to the motor is kept to an amount to which the engine generator can respond, the engine generator is prevented from hunting, and the rotational speed of the engine generator is stabilized.