Propulsion unit
AssigneeAlstom
InventorsClive David Lewis, David Christopher Brook
Life of this patent
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Abstract
A propulsion unit arranged to propel a waterborne vessel comprising an electric motor arranged to provide propulsion, and a housing arranged to contain the motor. The motor is mounted within the housing on resilient couplings. Such propulsion units are used to propel ships, and the like, and are suspended from beneath the vessel. The resilient couplings reduce the noise emitted by the housing.
Claims25
A propulsion unit arranged to propel a waterborne vessel, the unit comprising:
- an electric motor for providing propulsion;
- a housing for containing the motor, said motor being mounted within said housing on resilient couplings;
- and a pulse width modulated (PWM) drive unit for supplying the motor.
A propulsion unit arranged to propel a waterborne vessel, the unit comprising:
- an electric motor for providing propulsion, and a housing for containing the motor, said motor being mounted within said housing on resilient couplings, said housing having extended portions for housing the resilient couplings.
A propulsion unit arranged to propel a waterborne vessel, the unit comprising:
- an electric motor for providing propulsion;
- a housing for containing the motor, said motor being mounted within said housing on resilient couplings;
- and an intermediate member provided between the housing and the resilient couplings, said intermediate member comprising a bar running substantially parallel to an axis of the motor.
Dependencies are inferred from the claim text.