Electric drive system

Details Electric drive system Electric drive system

1997-02-28

1998-10-06

Sotelo, Jesus D.

Marine propulsion

Electric drive for propelling means

290 4R, 307 84, 363178, B63H 2112

Patent

active

058168702

ABSTRACT:
An electric drive system for launches and sailboats utilizing standard three-phase industrial motors, directly driving low speed propellers without the use of gearboxes. The motor is driven with a standard industrial inverter and is operated in the constant torque mode to achieve the desired shaft horsepower at 30% to 40% of full motor rating. The inverter is powered by a battery bank of a series connected cells achieving a nominal voltage of 300 VDC which feeds the DC bus of the inverter directly.

REFERENCES:
patent: 4114555 (1978-09-01), O'Brien
patent: 5199912 (1993-04-01), Dade et al.

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