Dual propeller drive system for a ship
AssigneeABB Schweiz AG
InventorsChenjie Lin, Colin E Tschida, Ghanshyam Shrestha, Steven Englebretson
Life of this patent
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Abstract
A drive system is provided for propelling a ship through water. The drive system has two propellers. The propellers are coaxial so that one propeller engages the incoming water first, and the other propeller engages the water after it passes through the first propeller. The drive system has a stator that causes a first rotor to rotate. The first rotor is connected to, the first propeller to cause the first propeller to rotate. The first rotor also causes a second rotor to rotate. The second rotor is connected to the second propeller to cause the second propeller to rotate.
Claims20
A ship, comprising:
- a hull;
- a stator non-rotatably fixed to the hull, the stator comprising electrical windings conducting electrical current and generating a first rotating magnetic field;
- a first rotor rotatably connected to the hull, the first rotor being rotatably driven by the first rotating magnetic field of the stator, the first rotor comprising a plurality of first permanent magnets spaced thereabout producing a second rotating magnetic field as the first rotor rotates;
- a second rotor rotatably connected to the hull, the second rotor being rotatably driven by the second rotating magnetic field of the first rotor;
- a first propeller connected to the first rotor and being rotatably driven thereby to drive the hull through water;
- and
- a second propeller connected to the second rotor and being rotatably driven thereby to drive the hull through the water.
A ship, comprising:
- a hull;
- a stator non-rotatably fixed to the hull, the stator comprising electrical windings conducting electrical current and generating a first rotating magnetic field;
- a first rotor rotatably connected to the hull, the first rotor being rotatably driven by the first rotating magnetic field of the stator, the first rotor producing a second rotating magnetic field as the first rotor rotates;
- a second rotor rotatably connected to the hull, the second rotor being rotatably driven by the second rotating magnetic field of the first rotor;
- a modulator between the first and second rotors, the modulator magnetically transmitting torque from the first rotor to the second rotor;
- a first propeller connected to the first rotor and being rotatably driven thereby to drive the hull through water;
- and
- a second propeller connected to the second rotor and being rotatably driven thereby to drive the hull through the water.
Dependencies are inferred from the claim text.