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1. WO2010008697 - SYSTEM AND METHOD FOR DYNAMIC ENERGY RECOVERY IN MARINE PROPULSION

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[ EN ]

CLAIMS:

1. A method for controlling operation of a propulsion system of a waterborne vessel, comprising: adjusting recovery of energy generated from the propulsion system to maintain position of the waterborne vessel in response to at least an indication of vessel position.

2. The method of claim 1, wherein the adjusting includes adjusting a braking force generated by a thruster in the propulsion system, and where the energy is braking energy generated through a motor coupled to the thruster.

3. The method of claim 1, wherein the adjusting includes adjusting a braking force generated by a first propeller in the propulsion system, and where the energy is braking energy generated through a motor coupled to the propeller.

4. The method of claim 3, further comprising driving a second propeller with the recovered braking energy to further maintain the position of the waterborne vessel.

5. The method of claim 1, further comprising storing recovered braking energy in an energy storage device.

6. The method of claim 5, wherein the energy storage device includes a battery coupled in the propulsion system.

7. The method of claim 1, wherein the adjusting includes adjusting a braking force generated by a water flow actuator coupled in the propulsion system, where the water flow actuator interfaces with water to recover energy and generate the braking force, and wherein the water flow actuator interfaces with water and is driven to generate a driving force, both the braking force and the driven force generated while the water flow actuator rotates in a first direction.

8. The method of claim 1, wherein the adjusting of the propulsion system compensates for position errors generated by wind and waves affecting the waterborne vessel.

9. The method of claim 1, where the waterborne vessel travels in a first direction, and the position in a second direction, orthogonal to the first direction, is maintained.

10. The method of claim 1 where the waterborne vessel is maintained at a fixed longitude and latitude.

11. The method of claim 1 where energy is recovered at least from a regeneration-dedicated propulsion unit of the propulsion system.

12. A system for a waterborne vessel, comprising: an engine; an electrical power generator coupled to the engine; a battery;

a first motor coupled to a first water flow actuator for controlling positioning of the vessel, the first motor electrically coupled to the electrical power generator and the battery; a second motor coupled to a second water flow actuator for controlling positioning of the vessel, the second motor electrically coupled to the electrical power generator and the battery and; an electronic controller for maintaining position of the waterborne vessel by adjusting at least the first water flow actuator and the second water flow actuator, the controller operating the first motor to drive the first water flow actuator while operating the second motor to brake the second water flow actuator during a first condition, the controller further operating the second motor to drive the second water flow actuator while operating the first motor to brake the first water flow actuator during a second condition, wherein the controller operates the second motor to regenerate energy from the second water flow actuator during the first condition, and operates the first motor to regenerate energy from the first water flow actuator during the second condition.

13. The system of claim 12, wherein, during the first condition, the regenerated energy from the second water flow actuator drives the first water flow actuator. .

14. The system of claim 12, wherein the electronic controller operates the battery to store the regenerated energy.

15. The system of claim 12 wherein, during the second condition, the regenerated energy from the first water flow actuator drives the second water flow actuator.

16. A system for a waterborne vessel, comprising: an engine; an electrical power generator coupled to the engine; a battery; a first motor coupled to a first thruster for controlling positioning of the vessel, the first motor electrically coupled to the electrical power generator and the battery; a second motor coupled to a second thruster for controlling positioning of the vessel, the second motor electrically coupled to the electrical power generator and the battery; a third motor coupled to a first propeller for controlling positioning of the vessel, the third motor electrically coupled to the electrical power generator and the battery and; an electronic controller for maintaining position of the waterborne vessel by adjusting the thrusters and propeller, where each of the thrusters and propeller is adjusted to maintain position of the vessel by operating to drive and brake the vessel in response to feedback of vessel position, where during the braking, energy is recovered and electrical energy is generated and stored in the battery or delivered to a driving water flow actuator.

17. The system of claim 16, wherein the electronic controller selectively varies which of the thrusters and propeller brakes the vessel in response to the feedback of vessel position.

18. The system of claim 16, wherein the electronic controller selectively varies which of the thrusters and propeller drives the vessel in response to the feedback of vessel position.

19. The system of claim 16, wherein the electronic controller operates the thrusters to brake the vessel while the propeller drives the vessel during a first condition, operates the propeller and the first thruster to drive the vessel while the second thruster brakes the vessel during a second condition.

20. The system of claim 16, wherein the controller operates the engine in an idle mode while maintaining the position.

21. A method for controlling operation of a propulsion system of a first waterborne vessel, comprising: during transportation of the first vessel under power of a second vessel, recovering energy generated from the propulsion system of the first vessel.