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A marine power distribution arrangement includes a turbine-driven AC generator which supplies AC power at a frequency of 240 Hz through a switchgear unit to a transformer and a first power converter by which the power is converted to a variable frequency, variable voltage AC output for ship propulsi

A marine power distribution arrangement includes a turbine-driven AC generator which supplies AC power at a frequency of 240 Hz through a switchgear unit to a transformer and a first power converter by which the power is converted to a variable frequency, variable voltage AC output for ship propulsion and to a second power converter by which the AC power is converted to a fixed voltage, fixed AC frequency or DC power to supply the ship service loads. A battery backup power supply may be switched in an emergency. In another embodiment four turbine-driven AC generators and two emergency power supplies are provided to drive two propulsion shafts as well as to supply the ship service loads.

대표청구항 ▼

[ We claim:] [1.] A marine power distribution arrangement comprising:a prime mover for providing rotational shaft horsepower;an AC generator connected directly to the prime mover and designed to operate at the prime mover rated speed to generate voltage at an operating frequency higher than 60 Hz;a

[ We claim:] [1.] A marine power distribution arrangement comprising:a prime mover for providing rotational shaft horsepower;an AC generator connected directly to the prime mover and designed to operate at the prime mover rated speed to generate voltage at an operating frequency higher than 60 Hz;a propulsion modular PWM multi-level, multi-circuit power converter connected to receive power from the generator and to provide variable voltage and frequency power;an AC propulsion motor connected to receive variable voltage and frequency power from the propulsion modular power converter, the AC propulsion motor having a shaft connected directly to a propulsor shaft so that the propulsor shaft RPM is controlled by the power converter output voltage and frequency; anda ship service modular PWM multi-level, multi-circuit power converter connected to receive power from the AC generator and providing power at a fixed voltage and frequency to a ship service power distribution system.