Method and apparatus for powering of amphibious craft

• US 8,083,557 B2
• Filed: 01/21/2009
• Issued: 12/27/2011
• Est. Priority Date: 01/18/2008
• Status: Expired due to Fees

• Current Assignee: Steven Sullivan
• Original Assignee: Steven Sullivan
• Inventors: Sullivan, Steven
• Primary Examiner(s): Olson, Lars A
• Application Number:
  US12/357,153
• Publication Number:
  US 20090186535A1
• Time in Patent Office: 1,070 Days
• Field of Search: 440/6, 440/12.5, 440/12.53, 440/12.57, 440/12.66, 440/38, 290/54
• US Class Current: 440/6
• CPC Class Codes: B60F 3/0007 Arrangement of propulsion or steering means on amphibious vehicles marine propulsion or steering B63H

Abstract

The methods and apparatuses of the present invention provides for powering and maneuvering (forward, reverse and steering) systems for amphibious vehicle, marine vessel or ground vehicle operation and control. An improved propulsion system may incorporate the use of electric motors combined with impellers which use positive and negative magnetic torque applications and allows for new control strategies when used in water or on the ground. More precise control of the motoring and steering forces is provided which is suitable for use in a variety of amphibious, marine vessels or ground vehicle applications. Various types of electric drive motor/generators may be incorporated for use therein. Intelligent motion control systems may provide for improved vehicle control that can provide motive force and braking force in a precisely controlled manner that significantly improves performance and has faster control dynamics incorporating a fully integrated electrical braking and maneuvering system.

Claims

1. A marine propulsion system for wheeled amphibious craft having an in wheel electric motor/generator, comprising:

a jet propulsion unit having;

an inlet for fluid flow,

adaptive outlet nozzles through which fluid discharge is controlled as to direction and as to size for the purpose of maximizing at least one of thrust and efficiency based upon measured true input power,

a fluid flow path to direct said fluid flow between said inlet and said outlet nozzles,

at least one impeller disposed within said fluid flow path to impart energy into said fluid flow from an electrical power source provided to the in wheel electric motor/generator,

wherein said impeller is operably coupled to said in wheel electric motor/generator of said wheeled amphibious craft,

wherein the wheel hub of said in wheel electric motor/generator is the impeller and stator vanes are operably coupled to a stator structure of said in wheel electric motor/generator,

a fluid flow defining channel which accommodates said in wheel electric motor/generator with a wheel hub impeller arrangement,

wherein said in wheel electric motor/generator is comprised of;

at least one rotor section and at least one stator section arranged such that a gap exists between rotor and stator sections,

wherein said rotor section is operably coupled to a wheel of said wheeled amphibious craft for rotation and said stator section is operably coupled to the amphibious craft for nonrotational support, the rotor section comprising a permanent magnet structure with an associated magnetic flux field and the stator section comprising current carrying conductors;

wherein the wheel is operably coupled to the impeller and rotatable with respect to the stator section about a rotational axis;

wherein the stator and rotor sections of said in wheel electric motor/generator are configured such that the interaction of their magnetic fluxes causes at least one of;

(a) the conversion of electrical energy into rotational torque energy when electrical power is applied at input terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor magnetic flux field thus applying magnetic torque to said rotor section, and

(b) the conversion of rotational torque energy of said wheel into electrical energy when relative motion exists between the permanent magnet structure within the rotor section and the current carrying conductors within the stator section, generating electrical power at the terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic counter torque to said rotor section.

5. The system of claim 1, wherein:

at least a portion of the propulsion unit is formed by at least one selected from the set of;

copper, nickel, aluminum, bronze, stainless steel, titanium, carbides, complex alloys, composites, or hybrid composites with reinforcement materials.

6. The system of claim 1, wherein:

said permanent magnet structure is segmented into alternating north and south poles interacting with said current carrying conductors that are constructed of coils and controlled by an electrical control system such that the stator coils are associated with an equal number of rotor poles and wherein the coils of the stator section are sized similarly to the associated permanent magnets segments within the rotor section.

7. The system of claim 1, wherein:

said permanent magnet structure is constructed of homopolar magnets with a north/south pole interacting with said current carrying conductors, which is composed of electrically conductive material that is arranged to create at least one of motor action and generator action by interacting with said rotor section permanent magnet structure flux field, wherein the supplied electrical power is from an electrical power source through an electrical control system such that said electrically conductive material is supplied with direct current power and controlled as to power level, direction and duration via electrical connections and electrical control system to accomplish at least one of motor action and generator action.

8. The system of claim 6, wherein:

said electrical control system is an inverter controlling the supplied multiple phase pulse width modulated voltage from a DC power source to said stator coils;

said inverter having a controller for control of said inverter and applied active currents, wherein the controller detects rotor velocity based on rotor position and rate of change in position, the controller controlling a duty cycle of said multiple phase pulse width modulated voltage modulating the duty cycle, to minimize the difference between a target value of rotor velocity and the detected rotor velocity wherein said controller modifies said duty cycle of said controller to minimize said difference between the target rotor velocity value and actual rotor velocity.

9. The system in accordance with claim 8, further comprising:

hall effect sensors within said stator section, the hall effect sensors sensing the direction of rotation, position and velocity of the rotor magnets in relationship with associated stator coil windings to time the application of currents to said stator coil windings and for tracking the applied active currents and to provide for velocity and directional information to said control system for the purpose of generating magnetic torque applications to produce motor action.

10. The system in accordance with claim 8, further comprising:

a sensorless control system using voltage within the stator coils to determine the direction of rotation, position and velocity of the rotor magnets in relationship with associated stator coil windings to time the application of currents to said stator coil windings and to provide for positional, velocity and directional information to said control system for the purpose of generating magnetic torque applications to produce motor action.

11. The system in accordance with claims 9 or 10, wherein:

the velocity of the rotor is targeted such that the rotational velocity of the associated wheel tire is made to closely match the relative ground speed of an associated aircraft, thus causing landing gear wheels of said aircraft to start out in a rolling friction state.

12. The system in accordance with claims 6 or 7, wherein:

said stator and rotor sections comprise an axial flux design, wherein electrical connections to an electrical source are provided for via an electronic switching and control system such that each stator coil may generate an individual axial magnetic flux field to interact with the associated axial magnetic flux field of the permanent magnets within the rotor section to create motor action.

13. The system in accordance with claims 6 or 7, wherein:

said stator and rotor section comprise a radial flux design, wherein electrical connections to an electrical energy source are provided for via an electronic switching and control system such that each tube conductor may generate an individual radial magnetic flux field to interact with the associated radial magnetic flux field of said permanent magnets within the rotor section to create motor action.

14. The system in accordance with claims 6 or 7, wherein:

electrical power is applied to at least one stator section coil in such a manner as to apply a braking effect by motoring the associated rotor sections to oppose the rotor section'"'"'s rotational direction.

15. The system in accordance with claim 6, wherein:

the generated electrical power is supplied to an electrical power storage device through an electrical control system such that the stator coil windings supply a varying number of alternating current power levels with various electrical phases via electrical connections and the electrical control system to accomplish generator action.

16. The system in accordance with claim 7, wherein:

the generated electrical power is supplied to an electrical power storage device through an electrical control system such that said electrically conductive material supplies direct current power controlled as to power level, direction and duration via electrical connections and the electrical control system to accomplish generator action.

17. The system in accordance with claims 6 or 7, wherein:

the generated electrical output power is dissipated within an energy dissipation device through the control system such that the stator coil windings supply an output power signal that is applied to said energy dissipation device.

18. The system in accordance with claim 17, wherein:

said energy dissipation device is configured for induction heating wherein heating of an object is accomplished by electromagnetic induction, where eddy currents are generated within the object of conductive material and the associated resistance leads to Joule heating of said object, wherein the induction heating consists of an altering electromagnetic flux field generated by an alternating current as it is passed through a coil and an associated object which has eddy currents introduced due to time rate of change of the electromagnetic flux field, thus generating heating of said associated object.

19. The system in accordance with claim 17, wherein:

the energy dissipation device is comprised of at least one dissipation resistor for the purpose of converting the electrical power into heat energy.

20. The system in accordance with claim 19, wherein:

said at least one dissipation resistor is composed of heat-generating material within a sealed thermal heat sink enclosure and a phase change material within said sealed thermal heat sink that is in thermal contact with said heat-generating material.

21. The system in accordance with claim 12, wherein:

an Axial Flux Permanent Magnet (AFPM) implementation of a Halbach-type magnet array is constructed such that constructed poles and permanent magnets rotate and are arranged to produce a uniform axial flux distribution on the magnets to increase the magnetic flux density interacting with the current carrying conductors to further increase energy density of the motor/generator.

22. The system in accordance with claim 13, wherein:

a Radial Flux Permanent Magnet (RFPM) implementation of a Halbach-type magnet array is constructed such that constructed poles of the permanent magnets are arranged to increase the magnetic flux density interacting with the current carrying conductors to further increase energy density of the motor/generator.

2. A propulsion system for wheeled amphibious craft having an in wheel electric motor/generator, comprising:

a control system through which vehicle maneuvering is controlled as to direction and as to maximizing at least one of torque applied and efficiency,

a torque controller to direct torque to each individual wheel from an electrical power source provided to the in wheel electric motor/generator,

wherein each said wheel is operably coupled to said wheeled amphibious craft,

wherein said in wheel electric motor/generator is comprised of;

at least one rotor section and at least one stator section arranged such that a gap exists between said rotor and stator sections,

wherein said rotor section is operably coupled to a wheel of said wheeled amphibious craft for rotation and said stator section is operably coupled to an an amphibious craft for nonrotational support, the rotor section comprising a permanent magnet structure with an associated magnetic flux field and the stator section comprising current carrying conductors; and

said wheel is operably coupled to an impeller and rotatable with respect to the stator section about a rotational axis;

wherein the stator and rotor sections of said in wheel electric motor/generator are configured such that the interaction of their magnetic fluxes causes at least one of;

(a) the conversion of electrical energy into rotational torque energy when electrical power is applied at input terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic torque to said rotor section of said wheel, and

(b) the conversion of rotational torque energy of said wheel into electrical energy when relative motion exists between the permanent magnet structure within the rotor section and the current carrying conductors within the stator section, generating electrical power at the terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic counter torque to said rotor section.

23. The system in accordance with claim 2, further comprising:

an intelligent control system that comprises vehicle control systems that drive and brake each wheel independently, wherein the applied torque to the in wheel motor/generator is known and the control dynamics is fast to allow for intelligent motion controls of the vehicle, wherein each wheel with an in wheel motor/generator generates positive and negative torque values in various combinations to enhance vehicle steering control capability, a permanent magnet DC motor that is coupled to the steering column and is used with a steer by wire steering unit to provide steering control through a Pulse Width Modulated (PWM) interface and increase stability and control, wherein such steering control comprises steering that is initiated automatically, wherein such a steering control incorporates high speed and low speed steering modes, wherein the angular movement and positioning control of each wheel is achieved by means of an articulated moveable linkage that is electromagnetically actuated, and wherein the steering is assisted from differential motoring and braking of each wheel.

24. The system in accordance with claim 23, wherein:

said intelligent control system contains at least one selected from the set of;

conditions, actions, state items, monitoring interface, or filters.

25. The system in accordance with claim 24, further comprising:

Traction Control Systems (TCS) applied to the in wheel hub motor/generators to be actively controlled by the motor controller with control dynamics, wherein said motor controller can be used to influence vehicle performance, wherein control of wheel traction influences motoring, braking, steering and cornering.

3. A marine propulsion system for water craft having an electric motor/generator, comprising:

a jet propulsion unit having;

an inlet for fluid flow,

adaptive outlet nozzles through which fluid discharge is controlled as to direction and as to size for the purpose of maximizing at least one of thrust and efficiency based upon measured true input power,

a fluid flow path to direct said fluid flow between said inlet and said outlet nozzles, and

at least one impeller disposed within said fluid flow path to impart energy into said fluid from an electrical power source,

wherein said impeller is operably coupled to said electric motor/generator and the stator vanes are operably coupled to a stator structure of said electric motor/generator,

a fluid flow defining channel which accommodates said electric motor/generator impeller arrangement,

wherein said electric motor/generator is comprised of;

at least one rotor section and at least one stator section arranged such that a gap exists between said rotor and stator sections,

wherein said rotor section is operably coupled to said impeller for rotation and said stator section is operably coupled to said fluid flow channel for non-rotational support, the rotor section comprising a permanent magnet structure with an associated magnetic flux field and the stator section comprising current carrying conductors;

wherein the fluid flow defining channel is a fluid flow defining channel of a marine craft;

wherein the rotor section is rotatable with respect to the stator section about a rotational axis;

wherein the stator and rotor sections of said electric motor/generator are configured such that the interaction of their magnetic fluxes causes at least one of;

(a) the conversion of electrical energy into rotational torque energy when electrical power is applied at input terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic torque to said rotor section of said impeller, and

(b) the conversion of rotational torque energy of said impeller into electrical energy when relative motion exists between the permanent magnet structure within the rotor section and the current carrying conductors within the stator section, generating electrical power at the terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic counter torque to said rotor section.

4. A marine propulsion system for wheeled amphibious craft having an in wheel electric motor/generator, comprising:

a radial wheel hub impeller propulsion unit that is partially submerged within a fluid to impart energy into said fluid and cause motive force to be applied by a rotating wheel to said amphibious craft, which is operably coupled to an in wheel electric motor/generator;

wherein said in wheel electric motor/generator is comprised of;

at least one rotor section and at least one stator section arranged such that a gap exists between said rotor and stator sections,

wherein said rotor section is operably coupled to a wheel of said wheeled amphibious craft for rotation and said stator section is operably coupled to the amphibious craft for nonrotational support, the rotor section comprising a permanent magnet structure with an associated magnetic flux field and the stator section comprising current carrying conductors;

wherein the wheel is operably coupled to an impeller and rotatable with respect to the stator section about a rotational axis;

wherein the stator and rotor sections of said in wheel electric motor/generator are configured such that the interaction of their magnetic fluxes causes at least one of;

(a) the conversion of electrical energy into rotational torque energy when electrical power is applied at input terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic torque to said rotor section of said wheel, and

(b) the conversion of rotational torque energy of said wheel into electrical energy when relative motion exists between the permanent magnet structure within the rotor section and the current carrying conductors within the stator section, generating electrical power at the terminals of said current carrying conductors to create an associated magnetic flux field within the current carrying conductors that interacts with said rotor section magnetic flux field, thus applying magnetic counter torque to said rotor section.

26. A marine propulsion system for wheeled amphibious craft, comprising:

an in-wheel motor/generator, comprising;

at least one rotor section and at least one stator section arranged such that a gap exists between rotor and stator sections; and

impeller blades operably connected to and rotatable with the rotor section;

wherein the stator section is configured for non-rotational coupling to an amphibious craft, the rotor section is configured for operable coupling to a wheel of the amphibious craft and for rotation with respect to the stator section, and the impeller blades are configured to form at least a part of a hub of the wheel;

wherein the rotor section comprises a permanent magnet structure and the stator section comprises current carrying conductors;

wherein the stator and rotor sections of the in wheel electric motor/generator are configured such that the interaction of their magnetic fluxes causes at least one of;

(a) the conversion of electrical energy into rotational torque energy when electrical power is applied at input terminals of the current carrying conductors; and

(b) the conversion of rotational torque energy of said wheel into electrical energy when relative motion exists between the permanent magnet structure and the current carrying conductors.