Prime-mover dynamo plants – Plural prime mover – Plural prime movers with fluid interconnection
Patent
1985-06-17
1987-04-28
Shoop, Jr., William M.
Prime-mover dynamo plants
Plural prime mover
Plural prime movers with fluid interconnection
318 67, H02P 546
Patent
active
046617140
ABSTRACT:
An AC marine propulsion system which provides a constant continuous rated horsepower availability at the standard rated engine RPM, over the full useful operating range of the propeller. A prime mover diesel engine is operated at its continuous rated speed to provide for maximum fuel efficiency. An alternator connected to the prime mover is driven at a speed which is higher than the standard rated alternator speed, thus producing higher than standard rated voltage and frequency. The combination of prime mover and alternator provides for an optimum system mass to power ratio. An AC motor is coupled through a gearbox to a fixed pitch propeller system. A frequency converter is dispsoed between the alternator and AC motor. Propeller RPM is controlled by changing the frequency of the voltage supplied to the AC motor. Variable shaft RPM at constant horsepower output is supplied to a fixed pitch propeller by selectively varying the frequency of the voltage supplied by the converter from 100% of maximum RPM to 40% of maximum RPM at 100% shaft horsepower.
REFERENCES:
patent: 3047724 (1962-07-01), Neufville et al.
patent: 3206664 (1965-09-01), Lilly
patent: 3543518 (1970-12-01), Shibata
patent: 3579086 (1971-05-01), Lebenbaum
patent: 3600655 (1971-08-01), Karlin et al.
patent: 4270072 (1981-05-01), Weber
H. W. O'Brien, Jr., "SCR Controlled Electric Propulsion System", 32 pages, Apr. 1, 1977.
Field, Jr. George B.
Satterthwaite J. Glenn
Duncanson Jr. W. E.
Shoop Jr. William M.
LandOfFree
Electric marine propulsion system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric marine propulsion system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric marine propulsion system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-478889