Title:
SHIP PROPULSION METHOD AND SHIP PROPULSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/056186
Kind Code:
A1
Abstract:
This ship propulsion device (1) propels a ship (2) by rotating a propeller (20). If the rotational speed of the propeller (20) is less than a predetermined rotational speed, a low-output auxiliary electric motor (M2) is controlled and rotationally driven by a lower-capacity general-purpose inverter (24), and the rotation is transmitted to the propeller (20), thereby causing the propeller (20) to rotate. In this case, the transmission of the rotation to a slip clutch (23) or an input shaft (7) is prevented by disconnecting an on-off clutch (8) in the drive system of a main electric motor (M1). If the rotational speed of the propeller (20) is the predetermined rotational speed or more, the drive source is switched from the auxiliary electric motor (M2) to the main electric motor (M1) and the on-off clutch (8) is connected. The rotational speed of the main electric motor (M1) is controlled by the slip clutch (23) and transmitted to the propeller (20), thereby rotating the propeller (20).
Inventors:
SHIRAISHI KOICHI (JP)
HATAMOTO TAKURO (JP)
KODERA MASANORI (JP)
HATAMOTO TAKURO (JP)
KODERA MASANORI (JP)
Application Number:
PCT/JP2015/077498
Publication Date:
April 06, 2017
Filing Date:
September 29, 2015
Export Citation:
Assignee:
NIIGATA POWER SYSTEMS CO LTD (JP)
International Classes:
B63H21/17; B63H23/18; B63H23/30
Domestic Patent References:
| WO2011021727A1 | 2011-02-24 |
Foreign References:
| JP2015143097A | 2015-08-06 | |||
| JP2007284018A | 2007-11-01 | |||
| JP2015003658A | 2015-01-08 | |||
| US20120083173A1 | 2012-04-05 |
Attorney, Agent or Firm:
TERAMOTO Mitsuo et al. (JP)
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