US20180226188A1 - Electric Rotary Motor with Two Degrees of Movement - Google Patents
Electric Rotary Motor with Two Degrees of Movement Download PDFInfo
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- US20180226188A1 US20180226188A1 US15/913,531 US201815913531A US2018226188A1 US 20180226188 A1 US20180226188 A1 US 20180226188A1 US 201815913531 A US201815913531 A US 201815913531A US 2018226188 A1 US2018226188 A1 US 2018226188A1
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- coil
- cam
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- vehicle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/041—Printed circuit coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/061—Winding flat conductive wires or sheets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/071—Winding coils of special form
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/10—Connecting leads to windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
- H02K15/0414—Windings consisting of separate elements, e.g. bars, hairpins, segments, half coils
- H02K15/0421—Windings consisting of separate elements, e.g. bars, hairpins, segments, half coils consisting of single conductors, e.g. hairpins
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/04—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
- H02K7/075—Means for converting reciprocating motion into rotary motion or vice versa using crankshafts or eccentrics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1869—Linear generators; sectional generators
- H02K7/1876—Linear generators; sectional generators with reciprocating, linearly oscillating or vibrating parts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F2027/297—Terminals; Tapping arrangements for signal inductances with pin-like terminal to be inserted in hole of printed path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/303—Clamping coils, windings or parts thereof together
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
- Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core
Definitions
- Electric motors convert electrical energy to mechanical energy through the interaction of magnetic fields and a current-carrying medium, which is typically a coiled wire.
- Electric generators convert mechanical energy to electrical energy by forcing electric charges to move through an electrical circuit, which is also typically a coiled wire.
- Coils used with electric motors or generators typically consist of a single continuous piece of material wound into a coil.
- Manufacture of a flat, square cross-section coil can be very expensive if made from one continuous piece of material.
- an electric coil may include multiple flat coil segments stacked together and electrically coupled in series, where each coil segment is rotated with respect to the coil segment it follows in the stack. Manufacturing of the coil segments may be much less expensive, and the segments can be combined into a single coil.
- each coil segment may be U-shaped and may be rotated 270 degrees with respect to the coil segment it follows in the stack of coil segments.
- a method of manufacturing such an electric coil includes fabricating multiple flat coil segments, stacking together and electrically coupling the multiple coil segments in series where each coil segment is rotated with respect to the coil segment it follows, and fastening the coil segments together to form the electric coil.
- the coil segments may be inexpensively formed by stamping or etching and bending the coil segments from a flat sheet of metal, for example. All sides of a coil segment may be equal in length or, alternatively, adjacent sides of a coil segment may be different lengths while opposite sides of the coil segment may be equal lengths.
- the coil may further include electrically-insulating material on portions of the coil segments. In a stack of coils segments, for example, all surfaces of the coil segments may be coated with an electrically-insulating layer of material except for the top surface of the finishing end of a lower coil segment in the stack and the bottom surface of the starting end of an immediately upper coil segment in the stack.
- the segments may be fastened together using bolts, for example, that may be inserted through the corners of the coil segments.
- a layer of electrically-insulating material may also cover the bolts. When assembled, electrically-insulating spacers may be placed in any gaps between the coil segments.
- FIGS. 1A and 1B illustrate example rotary devices.
- FIG. 1C illustrates an example magnetic stator assembly.
- FIGS. 1D-1F illustrate cross-sections of example rotary devices.
- FIGS. 2A-2C illustrate components of an example rotary device in action.
- FIG. 2D illustrates an example shape of a cam.
- FIGS. 2E-2H illustrate an example rotary device in action and coupled to a wheel.
- FIGS. 3A and 3B illustrate an example rotary device with an additional cam and magnetic stator components.
- FIG. 4A illustrates a mount attached to the magnetic stator assembly of an example rotary device.
- FIG. 4B illustrates a simplified cross-section of an example rotary device attached to the chassis of a vehicle.
- FIGS. 5A-5D illustrate a support structure coupling a magnetic stator assembly and mount of an example rotary device with electromagnetic actuators and coils of the device through a plurality of shafts.
- FIG. 6A illustrates a rotary bearing coupling a support structure of an example rotary device with a cam of the device.
- FIG. 6B illustrates a wheel structure coupling a cam of an example rotary device with a wheel of a vehicle.
- FIG. 7 illustrates a horizontal cross-section of an example rotary device.
- FIG. 8 illustrates a horizontal cross-section of an example rotary device from a top-down view.
- FIG. 9 illustrates an inner structure of a magnetic stator assembly of an example rotary device.
- FIG. 10 illustrates a horizontal cross-section of an example rotary device.
- FIG. 11 illustrates a horizontal cross-section of an example rotary device.
- FIG. 12A illustrates a vertical cross-section of an example rotary device showing how a support structure of an example rotary device may be arranged.
- FIGS. 12B-12D illustrate an example tunable pneumatic suspension.
- FIGS. 13A and 13B illustrate an example rotary device at different vertical positions.
- FIGS. 14A-14C illustrate the construction of an example coil of an electromagnetic actuator.
- FIG. 15 illustrates a wheel that includes an example rotary device.
- FIGS. 16A and 16B illustrate different views of an example rotary device.
- FIGS. 16C and 16D illustrate two rotationally offset cams.
- FIG. 16E illustrates an example shape of a cam.
- FIGS. 17A and 17B illustrate a disc of an example rotary device coupled to a rim of a wheel.
- FIG. 18 illustrates two support structures coupling respective magnetic stator assemblies with electromagnetic actuators through a plurality of shafts and fluid dampers.
- FIGS. 19A-19C illustrate an example arrangement of magnetic stators.
- FIGS. 20A-20G illustrate the construction of an example coil of an electromagnetic actuator.
- FIGS. 21A and 21B illustrate a side view and a top view of two rotary devices with respective wheels.
- FIGS. 22A-22C illustrate various different rotations of the wheels.
- FIGS. 23A and 23B illustrate vertical movement of the wheels.
- FIGS. 24A-24F illustrate a top view of a vehicle having four pairs of rotary devices with respective wheels.
- FIG. 1A shows an example rotary device 100 inside a wheel.
- the device includes a magnetic stator assembly 120 , opposed electromagnetic actuators 110 a , 110 b , and a linear-to-rotary converter (e.g., cam) 105 .
- the device may be attached to the chassis of a vehicle, for example, at a point on the far side of the wheel (not shown).
- the rotary device depicted inside the wheel may be attached to the wheel via the cam 105 using a circular plate, for example, which has been removed to show the inside of the wheel.
- Such a plate may be attached to both the rim of the wheel and the cam 105 using fasteners, such as bolts.
- the wheel and cam support plate rotate relative to a hub 145 about a bearing 150 .
- the cam 105 is shown as an oval shape, but may take other forms, such as, for example, a cam having multiple lobes.
- FIG. 1B shows the example rotary device 100 from the side of the wheel 140 and with the tire of the wheel 140 , and some other components, removed.
- the core of the rotary device includes the cam 105 , two opposed electromagnetic actuators 110 a , 110 b , and magnetic stator assembly 120 .
- the electromagnetic actuators 110 a , 110 b each include a coil 115 a , 115 b that is arranged to reciprocate relative to the magnetic stator assembly 120 .
- One electromagnetic actuator 110 a is shown having a housing 155 a surrounding its coil 115 a and the other electromagnetic actuator 110 b is shown with its housing removed to show its coil 115 b.
- the magnetic stator assembly 120 depicted in FIG. 1B is oriented vertically and may include a plurality of magnetic stators 125 a , 125 b .
- Each of the magnetic stators 125 a , 125 b may include a single magnet or multiple magnets.
- the actuators 110 a , 110 b are forced to reciprocate vertically along the magnetic stator assembly 120 due to the resulting electromagnetic forces.
- the rotary device 100 may include a plurality of shafts 130 a , 130 b , coupled to a bearing support structure 165 .
- the electromagnetic actuators 110 a , 110 b may slide along the shafts using, for example, linear bearings.
- Other bearings that may be used include air bearings, silicon nitride bearings, graphite bearings, and linear recirculating ball bearings.
- each electromagnetic actuator 110 a , 110 b may be a pair of followers 135 a - d used to interface with the cam 105 .
- the followers 135 a - d may spin to roll over the surfaces of the cam 105 .
- the followers 135 a - d may be attached to the electromagnetic actuators 110 a , 110 b via, for example, the actuators' housings. As the electromagnetic actuators 110 a , 110 b reciprocate, the force exerted by the followers 135 a - d on the cam 105 drives the cam 105 in rotary motion.
- FIG. 1C illustrates an example magnetic stator assembly 120 with two magnetic stators 125 a , 125 b .
- the magnetic stators 125 a , 125 b each include multiple magnets.
- magnetic stator 125 a includes, on one surface of the stator 125 a , eight magnets 160 a - h.
- FIGS. 1D-1F illustrate simplified cross-sections of example rotary devices.
- the device of FIG. 1D is within a wheel 140 of a vehicle and includes a hub (or mount) 145 coupled to a magnetic stator assembly 120 having two magnetic stators 125 a , 125 b .
- two electromagnetic actuators (including coils) 110 a , 110 b that reciprocate relative to the magnetic stator assembly 120 along shafts 130 a , 130 b (shown as dashed lines).
- the shafts 130 a , 130 b are coupled to a bearing support structure 165 , keep the components of the device in vertical alignment, and prevent the wheel 140 from falling off of the device.
- a cam plate 170 coupled to the wheel 140 is rotatably coupled to the bearing support 165 through a bearing 150 .
- a cam 105 used to drive the plate 170 and, thus, the wheel 140 in rotary motion.
- the cam 105 is driven by the reciprocation of the electromagnetic actuators 110 a , 110 b using followers 135 a - d that are coupled to the electromagnetic actuators 110 a , 110 b and that interface with the cam 105 .
- a fluid damper 175 a coupling the bearing support 165 and the mount 145 .
- the fluid damper 175 a suspends the mount 145 above the ground and may allow for some movement between the bearing support 165 and the mount 145 , depending on the amount of resistance of the damper. For example, if the damper is a pneumatic damper, higher gas pressures inside the chambers of the damper allow for less movement than lower air pressures.
- FIG. 1E illustrates that in the absence of the fluid damper 175 a , the electromagnetic forces caused by the electromagnetic actuators 110 a , 110 b and magnetic stators 125 a , 125 b may suspend the mount 145 above the ground. If, however, electrical current is removed from the electromagnetic actuators 110 a , 110 b , the associated electromagnetic forces will also be removed and the mount 145 may drop toward the ground, along with the magnetic stator assembly 120 and vehicle chassis, as illustrated in FIG. 1F .
- FIGS. 2A-2C illustrate components of the rotary device 100 in action, including the rotary device's electromagnetic actuators 110 a , 110 b (with associated coils 115 a , 115 b and followers 135 a - d ) and cam 105 moving relative to the magnetic stator assembly 120 (including associated magnetic stators 125 a , 125 b ).
- the housings by which the followers are attached to the coils are not shown in these figures.
- the reciprocal movement of the coils 115 a , 115 b in opposition drives the cam 105 to rotate, which, in turn, may cause a wheel attached to the cam 105 to rotate.
- the coils 115 a , 115 b are shown in FIG.
- FIG. 2A shows that as the coils 115 a , 115 b move closer to each other, the coils 115 a , 115 b drive the cam 105 to rotate in a clockwise direction, thereby causing any attached wheel to also rotate clockwise.
- the force exerted on the cam 105 is caused by the outer followers 135 a , 135 c squeezing-in on the cam 105 .
- FIG. 2C shows that the coils 115 a , 115 b are yet closer together causing further clockwise movement of the cam 105 .
- the coils 115 a , 115 b After the coils 115 a , 115 b have reached their closest distance together and the cam 105 , in this case, has rotated ninety degrees, the coils 115 a , 115 b begin to move away from each other and drive the cam 105 to continue to rotate clockwise. As the coils 115 a , 115 b move away from each other, the inner followers 135 b , 135 d exert force on the cam 105 by pushing outward on the cam 105 .
- the cam 105 is shown in the figures as an oval shape, but the cam 105 may be shaped in a more complex pattern, such as, for example, a shape having an even number of lobes, as illustrated in FIG. 2D .
- each lobe may be shaped in the form of a sine wave or a portion of an Archimedes spiral, for example.
- the number of lobes determines how many cycles the coils must complete to cause the cam to rotate full circle.
- a cam with two lobes will rotate full circle upon two coil cycles.
- a cam with four lobes will rotate full circle upon four coil cycles. Additionally, more lobes in a cam creates a higher amount of torque.
- the electromagnetic actuators may act as generators by drawing current from the coils as the cam rotates. This also has the effect of reducing the rotational movement of the cam when energy is absorbed from the rotational movement of the cam.
- drawing current from the coils may act as a regenerative braking mechanism for the vehicle.
- the devices may act as generators
- rotation of the wheel caused by an outside force may recharge the batteries of a vehicle.
- the vehicle may be positioned so that at least one of its wheels is placed on a recharging device that causes the wheel to rotate.
- a recharging device may be similar to a dynamometer, which may be placed on or in a floor. But while a vehicle causes a dynamometer to rotate, it is the rotation of the recharging device that causes the vehicle's wheel to rotate, thereby causing the electromagnetic actuators to act as generators and to charge the vehicle's batteries.
- the recharging device may be powered by, for example, electricity or fuel.
- heat produced by the reciprocation of the coils 115 a , 115 b may be reduced by spraying a liquid coolant, such as, for example, water, on the coils 115 a , 115 b .
- a liquid coolant such as, for example, water
- This may be accomplished by spraying liquid through openings 146 in the magnets of the magnetic stators 125 a , 125 b and onto the coils 115 a , 115 b as they pass by the openings 146 .
- the liquid coolant may be transported to the openings 146 through channels in the magnetic stator assembly 120 .
- the sprayed liquid may then be collected for reuse or may be allowed to convert to a gas and be vented from the rotary device.
- FIGS. 2E-2H also illustrate components of an example rotary device in action, but with a wheel 140 that is attached to the cam 105 through a plate, or similar structure (not shown).
- a white circle appears on the wheel 140 to show the wheels position at different points during reciprocation of the electromagnetic actuators 110 a , 110 b .
- the wheel 140 rotates along with the rotating cam 105 .
- FIG. 3A illustrates a rotary device similar to the device of FIGS. 2A-2C , but with an additional cam 106 on the other side of the magnetic stator assembly 120 .
- Reciprocation of the coils 115 a , 115 b acts to also drive the second cam 106 in rotary motion, and the second cam 106 may be attached to the other side of a wheel using, for example, another circular plate.
- the magnetic stator assembly 120 of the example device may be in the shape of a long extended box-shaped core of magnetically permeable material, with a magnetic stator 125 a , 125 b at either end.
- each magnetic stator 125 a , 125 b includes magnets on all four sides of the magnetic stator assembly 120 .
- the box-shaped core, on which the magnetic stators 125 a , 125 b are affixed in the example device, may act as a return path for the magnetic flux of the magnetic stators 125 a , 125 b .
- the coils 115 a , 115 b of the electromagnetic actuators may have a rectangular shaped cross-section and arranged to surround the magnetic stators 125 a , 125 b . This arrangement allows for efficient utilization of the electromagnetic forces between the coils 115 a , 115 b and the magnetic stators 125 a , 125 b.
- FIG. 3B illustrates the rotary device of FIG. 3A , but with additional magnets 325 a , 325 b arranged outside of the coils 115 a , 115 b .
- each end of the magnetic stator assembly 120 includes an additional four magnet arrays, one on each side of a rectangular cross-section coil 315 a , 315 b .
- the additional magnets 325 a , 325 b enables the creation of more electromagnetic force.
- Also shown in FIG. 3B is an additional magnetic return path 320 for the additional magnets 325 a , 325 b.
- FIG. 4A illustrates a mount 145 to which the magnetic stator assembly 120 , including magnets and return paths, may be attached.
- the mount may be part of, or further attached to, for example, a chassis of a vehicle (not shown).
- the mount 145 includes outer and inner hub plates 445 a , 445 b , the latter of which may be bolted to the chassis of a vehicle. Delivery of electrical current to the coils 115 a , 115 b may be accomplished using electricity-conducting flexures (not shown in FIG. 4A ) that extend from the mount 145 to the coils 115 a , 115 b .
- the flexures allow current to be delivered to the coils 115 a , 115 b even as the coils reciprocate along the magnetic stator assembly 120 .
- the flexures may electrically couple to an electrical supply (not shown in FIG. 4A ), such as a battery, coupled to the mount or located in the chassis of a vehicle, the supply delivering electrical current to the coils 115 a , 115 b.
- FIG. 4B illustrates a simplified cross-section of an example rotary device attached to the chassis of a vehicle 405 .
- FIG. 4B is similar to FIGS. 1D-1F , but with some components removed for clarity.
- the figures shows a mount 145 coupled to the chassis of a vehicle 405 and a magnetic stator assembly 120 . Also shown are a cam 105 , cam plate 170 , wheel 140 , bearing 150 , and electromagnetic actuators 110 a , 110 b .
- Coupled to the mount 145 is an electrical unit 410 , which is used to deliver electricity to the electromagnetic actuators 110 a , 110 b through a pair of flexures 415 a , 415 b .
- a battery 420 for storing electrical energy.
- the electrical unit 410 and the battery 420 are shown as being coupled to the mount 145 , the electrical unit 410 , battery 420 , or both may, instead, be coupled to the support structure 165 ( FIG. 1D ).
- the electrical unit 410 may be controlled by a controller 430 on the chassis of the vehicle 405 and through a fiber-optic cable 435 running between the controller 430 and the electrical unit 410 .
- the example rotary device also includes a bidirectional power line 440 connecting the electrical unit 410 and the battery 420 .
- power may flow from the battery 420 to the electrical unit 410 and on to the electromagnetic actuators 110 a , 110 b .
- power may flow from the electromagnetic actuators 110 a , 110 b to the electrical unit 410 and on to the battery 420 .
- the vehicle may also include a charger 425 for charging the battery 420 using an external power source (not shown), such as an electrical outlet or gasoline engine in the case of a hybrid vehicle.
- an external power source such as an electrical outlet or gasoline engine in the case of a hybrid vehicle.
- power flows from the external power source to the charger 425 and on to the battery 420 through line 427 , the electrical unit 410 , and the bidirectional power line 440 .
- the battery 420 may be charged by either an external power source or by the rotary device acting as a generator.
- the electrical unit 410 may control the reciprocation of the coils. For example, when at speed, the electrical unit 410 may control the constant reciprocation of the coils.
- the controller 430 may be operated by a driver (not shown) of a vehicle and, in response to actions by the driver, the controller 430 may send commands to the electrical unit 410 to cause the rotary device to accelerate, decelerate, or change direction, for example.
- the electrical unit 410 may be configured to provide an electrical component to the electromagnetic actuators 110 a , 110 b to drive their coils in the same direction, thereby creating a vertical translational movement of the wheel 140 .
- any translational movement of the wheel 140 may be sensed by the electrical unit 410 .
- the electrical unit 410 may be configured to absorb energy from the translational movement of the wheel by causing the electromagnetic actuators 110 a , 110 b to act as electrical generators and dampers. This energy may be transferred to the battery 420 for storage.
- FIG. 5A illustrates a bearing support structure 165 .
- a rotary bearing (not shown) that supports the cam plate and, thus, the wheel is mounted to a flange 585 .
- the bearing support 165 and the electromagnetic actuators 110 a , 110 b with coils 115 a , 115 b are kept in vertical alignment using a plurality of shafts 130 a - d . If the rotary device is employed in the wheel of a vehicle, the support structure 165 allows the magnetic stator assembly 120 , mount 145 , and chassis of the vehicle (not shown) to remain suspended above the ground without electrical power.
- both the support structure 165 and the electromagnetic actuators 110 a , 110 b can provide suspension for the vehicle, but the electromagnetic actuators 110 a , 110 b require electrical power to lift the magnetic stator assembly 120 , mount 145 , and vehicle chassis off the ground.
- the support structure 165 may use fluid dampers (not shown) for suspension.
- the support structure 165 also enables the use of multiple flexures in series for delivering electricity to the coils.
- one set of flexures may run between the mount 145 and the support structure 165
- another set of flexures may run between the support structure 165 and the coils 115 a , 115 b .
- Use of multiple flexures is advantageous when the bearing support 165 moves in a vertical direction. During such vertical movement of the bearing support 165 and reciprocation of the coils 115 a , 115 b , one set of flexures may flex with respect to the vertical movement of the bearing support 165 , and the other set of flexures may flex with respect to the reciprocation of the coils 115 a , 115 b .
- FIG. 5B illustrates the magnetic stator assembly 120 , mount 145 , and vehicle chassis as being raised with respect to the other components of the rotary device. This is accomplished either by adding an electrical component to the coils 115 a , 115 b to cause both coils to move in the same direction (e.g., in this case down relative to the stator assembly and chassis) or by using the fluid dampers (not shown) of the support structure 165 , as described below.
- the vertical movement of the coils 115 a , 115 b may occur concurrently with, or apart from, opposed coil reciprocation.
- the effect that the vertical movement has on a vehicle for example, is to raise or lower the vehicle's ride height or to act as a shock absorber (e.g., going over bumps).
- either the fluid dampers or the coils 115 a , 115 b may be used to raise, and keep raised, the chassis of the vehicle with respect to the wheels.
- either the fluid dampers or the coils 115 a , 115 b may react to a bump in the road by allowing the wheels to quickly rise with respect to the chassis of the vehicle and then return to their normal position.
- all four wheels of a vehicle may be thrust rapidly downwards with respect to the chassis of the vehicle to cause the vehicle to jump off of the ground.
- the rotary device may exhibit at least two degrees of movement: rotational movement with opposed reciprocation of the coils and linear movement with movement of the coils in a common direction. These degrees of movement may be performed either separately or together.
- FIG. 5C shows a horizontal cross-section through the device showing the support structure 165 as surrounding, but not coupled to, the mount 145 . Also shown are a plurality of shafts 130 a - d coupled to the support structure to maintain alignment among the components of the rotary device. A plurality of fluid dampers 175 a - d , described below, are also shown.
- FIG. 5D illustrates the side of an example rotary device including one pair of flexures 505 a , 505 b running between components 545 a , 545 b of the mount 145 and the support structure 165 , and another pair of flexures 510 a , 510 b running between the support structure 165 and the electromagnetic actuators 110 a , 110 b.
- FIG. 6A illustrates a rotary bearing 150 used to couple the bearing support structure 165 with one of the cams 105 .
- An inner race 650 a is coupled to the bearing support 165 and an outer race 650 b couples a wheel structure (not shown), such as a cam plate and, thus, to the cam 105 and outer wheel rim.
- the wheel structure may be a plate, a plurality of spokes, a lattice, or other appropriate structure as known in the art.
- the rotary bearing 150 is not coupled directly to the mount 145 , but rather, in the example device, through a fluid damper.
- Another rotary bearing (not shown) may be used to couple the support structure 165 with the other cam 105 on the other side of the rotary device.
- the support structure 165 and wheel have the same vertical position with respect to each other. Because of its constant vertical position with respect to the wheel, the shafts 130 a - d may be fixed to the support structure 165 , thereby preventing the shafts from coming into contact with the wheel.
- FIG. 6B illustrates a wheel structure 605 coupling a cam 105 of an example rotary device with a wheel rim 140 of a vehicle.
- the cam 105 is fixed to the wheel structure 605
- the wheel structure 605 is fixed (e.g., using bolts) to the wheel 104 rim. Rotation of the cam 105 , thus, causes rotation of the wheel structure 605 and the wheel 104 .
- FIG. 7 shows a horizontal cross-section of an example rotary device.
- the cross-section is cut through one of the electromagnetic actuators 155 .
- a coil 115 a Inside the electromagnetic actuator 155 is shown a coil 115 a and the components of the magnetic stator assembly 120 .
- the magnetic stator assembly 120 includes an inner magnetic stator component 125 a , including a plurality of magnets, and an outer magnetic stator component 325 a , also including a plurality of magnets.
- the magnetic stator assembly 120 also includes an inner magnetic flux return path 725 a for the inner magnetic stator component 125 a and includes an outer magnetic flux return path 735 a for the outer magnetic stator component 325 a .
- the inner magnetic stator component 125 a and inner magnetic flux return path 725 a are located inside of the coil 115 a
- the outer magnetic stator component 325 a and outer magnetic flux return path 735 a are located outside of the coil 115 a
- the housing of the electromagnetic actuator 155 which surrounds the coil 115 a and magnetic stator assembly 120 and slides along the long axis of the magnetic stator assembly 120 by sliding along a plurality of shafts 130 a - d .
- the housing of the electromagnetic actuator 155 may hold the coil 115 a using, for example, four bolts that run through the corners of the rectangular-shaped coil 115 a.
- FIG. 8 shows another cross-section of the example rotary device, but from a top-down view.
- the cross section shows a coil 115 a , inner magnetic stator component 125 a , outer magnetic stator component 325 a , inner magnetic flux return path 725 a , outer magnetic flux return path 735 a , electromagnetic actuator housing 155 a , and shafts 130 a - d .
- the inner magnetic stator component 125 a and inner magnetic flux return path 725 a are mounted to an inner structure 820 of an example magnetic stator assembly.
- bolts 815 having electrically insulating cover material 817 may be inserted through bolt holes 816 at the corners of the coil 115 a to fix the coil 115 a to the housing 155 a.
- FIG. 9 illustrates an inner structure 820 of an example magnetic stator assembly.
- a mount 145 ( FIG. 4A ) may be attached at point 910 to, for example, couple the structure 820 to the chassis of a vehicle.
- Channels 905 a - d may be used to transport a cooling fluid within the magnetic stator assembly to spray on the coils through the magnets.
- FIG. 10 shows a cross-section of the example rotary device.
- the cross-section is cut through the middle of the device and shows the inner structure 820 of the magnetic stator assembly, mount 145 , inner magnetic flux return path 725 a , and outer magnetic flux return path 735 a .
- the cross-section also shows a channel 1005 used to access the inner part of the magnetic stator assembly for running wires or cooling fluid, for example.
- FIG. 11 shows another cross-section of a rotary device as in FIG. 10 , but at a point slight higher than the cross-section of FIG. 10 .
- the cross-section shows channels 1105 a - d for inserting fasteners, such as screws.
- FIG. 12A shows a vertical cross-section of the example rotary device.
- the cross-section shows how the support structure illustrated in FIGS. 5A and 5B may be slidably coupled to the magnetic stator assembly and the mount 145 using additional shafts 1230 a , 1230 b and fluid dampers 175 a , 175 b .
- the support structure 165 may be coupled to the lower rod of a fluid damper 175 a .
- a connecting arm 1215 a pinned at point 1225 a to the lower end of the rod 1220 a is joined to the support at point 1205 .
- An upper rod of the fluid damper 175 a may be connected to the mount 145 of the device, which may be part of a vehicle's chassis.
- the mount 145 joins suspension arm 1240 a at point 1210 .
- the shaft 1230 a fixed to the support 165 , slides through the suspension arm 1240 a at opposite ends.
- the upper rod of the damper 175 a is pinned to the suspension arm 1240 a at point 1235 a.
- the fluid dampers 175 a , 175 b may be a pneumatic suspension, such as a piston with opposing gas chambers.
- the pressure of the gas in each chamber above and below the piston may also be dynamically adjusted to either change the position of the magnetic stator assembly and the mount 145 (e.g., move up or down) or to change the stiffness of the dampers 175 a , 175 b .
- pressure in the gas chambers may be adjusted so that the chambers have different pressures.
- the fluid dampers 175 a , 175 b each include a top and bottom chamber
- more pressure would be applied to the top chamber to move the magnetic stator assembly and the mount 145 in the upward direction
- more pressure would be applied to the bottom chamber to move the magnetic stator assembly and the mount 145 in the downward direction.
- equal pressure may be added to or removed from the top and bottom chambers. If the rotary device is used in the wheel of a vehicle, changing the position of the magnetic stator assembly and the mount 145 can change the ride height of the vehicle, and changing the stiffness of the dampers 175 a , 175 b can change the stiffness of the vehicle's suspension.
- FIG. 12A also shows the inside of the magnetic stator assembly.
- An example arrangement of the coil 115 b of an electromagnetic actuator, inside magnetic stator component 125 b , and outside magnetic stator component 325 b can be seen through the cross-section. Also visible is the magnetic flux return path 735 b for the outside magnetic stator component 325 b.
- FIGS. 12B-12D illustrate an example tunable pneumatic suspension.
- FIG. 12B shows that the suspension 175 a includes a piston 1276 and opposed chambers 1277 a , 1277 b applying respective opposed pneumatic pressures to opposite faces 1278 a , 1278 b of the piston 1276 .
- the example suspension 175 a includes a top chamber 1277 a and a bottom chamber 1277 b . Also shown is a pneumatic controller 1279 that independently controls the pneumatic pressures in the chambers 1277 a , 1277 b.
- the pressures of the chambers 1277 a , 1277 b may be adjusted to change the relative positions of the piston 1276 and the chambers 1277 a , 1277 b by differing the pressures. For example, as shown in FIG. 12C , a higher pressure in the bottom chamber 1277 b of the suspension 175 a , as compared to the top chamber 1277 a , exerts more force on the bottom face 1278 b of the piston 1276 , causing the piston 1276 and the bottom chamber 1277 b to move away from each other. As shown in FIG.
- a higher pressure in the top chamber 1277 a exerts more force on the top face 1278 a of the piston 1276 , causing the piston 1276 and the top chamber 1277 a to move to move away from each other.
- this movement can change the ride height of the vehicle, the direction of the vehicle's movement depending on whether the chambers 1277 a , 1277 b or the piston 1276 are coupled to the chassis of the vehicle. Either the chambers 1277 a , 1277 b or the piston 1276 may be grounded, while the other is coupled to the chassis of the vehicle.
- the pressures of the chambers 1277 a , 1277 b may be adjusted to change the stiffness of the suspension 175 a by adding or removing equal pressures to or from the chambers 1277 a , 1277 b . Adding equal pressure to both chambers 1277 a , 1277 b increases the stiffness of the suspension 175 a , and removing equal pressures from both chambers 1277 a , 1277 b decreases the stiffness of the suspension 175 a . If the suspension 175 a is part of a vehicle, changing the stiffness of the suspension 175 a can change the stiffness of the vehicle's ride.
- FIG. 13A illustrates an example rotary device incorporating many of the above-described features.
- the rotary device includes, for example, a cam 105 , two opposed electromagnetic actuators (including an example housing 155 a and coil 115 b ), a magnetic stator assembly (including an example inner magnetic stator component 125 b , outer magnetic stator component 325 b , and outer magnetic flux return path 735 b for the outer magnetic stator component 325 b ), mount 145 , suspension arms 1240 a , 1240 b , followers 135 a - d , support structure 165 , rotary bearing 150 , shafts 130 a , 130 b , 1230 a , 1230 b , and fluid dampers 175 a , 175 b.
- FIG. 13B illustrates the rotary device of FIG. 13A , but where the fluid dampers 175 a , 175 b have been used to raise the magnetic stator assembly and the mount 145 by, for example, applying more pressure to a top chamber within each of the fluid dampers 175 a , 175 b .
- the fluid dampers 175 a , 175 b , suspension arms 1240 a , 1240 b , magnetic stator assembly and the mount 145 are in a vertically higher position than illustrated in FIG. 13A .
- FIGS. 14A-14C illustrate the construction of an example coil from one of the electromagnetic actuators.
- the coil may include multiple flat coil segments stacked together and electrically coupled in series.
- FIG. 14A illustrates four coil segments that are combined into one coil 1400 .
- the coil of a given electromagnetic actuator may include a number of such coils.
- FIG. 14B illustrates one of the coil segments 1401 .
- FIG. 14C illustrates an exploded view 1405 of the coil of FIG. 14A .
- Each segment 1410 a - d of the example coil may be a flat, U-shaped piece of metal formed by, for example, a stamping or etching process.
- the segments 1410 a - d may be assembled in the configuration shown in FIG. 14C to form a full coil.
- FIG. 14C shows four U-shaped coil segments 1410 a - d that are stacked on top of each other, where each segment is rotated 270 degrees (or 90 degrees depending on the direction of rotation) with respect to the coil segment it follows in the stack of coil segments.
- the segments 1410 a - d may be positioned so that a starting end 1425 of an upper coil segment 1410 b in the stack interfaces a finishing end 1420 of an immediately lower coil segment 1410 a in the stack.
- the coil including the four U-shaped coil segments 1410 a - d for example, loops around three times to finish at the same relative position (e.g., ends 1415 and 1450 ) that it started.
- Electric current may flow through the coil, for example, from a starting end of a bottom-most coil segment in the stack to a finishing end of a top-most coil segment in the stack.
- electrical current 1455 may flow through the coil, for example, from a starting point 1415 to an ending point 1450 .
- the current 1415 may begin at point 1415 and flow counter-clockwise around segment 1410 a to point 1420 .
- the current continues to point 1425 as points 1420 and 1425 are in electrical contact with each other once assembled, as shown, for example, in FIG. 14A .
- the current 1415 flows counter-clockwise around segment 1410 b to point 1430 , where the current continues to point 1435 as described above.
- a method of manufacturing such an electric coil includes fabricating the multiple flat coil segments, stacking the multiple coil segments together where each coil segment is rotated with respect to the coil segment it follows, and fastening the coil segments together to form the electric coil.
- each segment may be coated with an electrically-insulating layer of material, except for the surfaces between which the current is meant to propagate, such as the top surface of point 1420 and the bottom surface of point 1425 .
- layers of electrically-insulating material may be inserted between the coil segments.
- the segments 1410 a - d may also be joined by soldering or brazing in addition to, or instead of, preloading the mechanical and electrical connections with fasteners.
- electrically-insulating spacers may be inserted between the points to fill the gaps.
- a gap may remain between points 1415 and 1450 , and one or more spacers may be inserted between points 1415 and 1450 to fill the gap.
- no gap should exist between points 1420 and 1425 .
- the fasteners may also be insulated using, for example, heat shrink tubing.
- the coil segments 1410 a - d may be mechanically and electrically joined together using bolts that pass through openings included in the segments 1410 a - d , where the openings are positioned outside the coil path so that a continuous, helical, flat coil may be formed. Fabricating coil segments at a constant thickness may be simple and inexpensive, but, at a constant thickness, the coil segment connections may occur outside the coil path so that intermediate segments do not overlap with the connection points.
- the shape of the connection points 1415 , 1420 , 1425 , 1430 , 1435 , 1440 , 1445 , 1450 may be chosen so that there is adequate contact area for a good mechanical connection that produces an acceptable contact resistance between the segments.
- the coil segments may be electroplated, with gold or nickel for example, to further reduce the contact resistance.
- connection points 1415 , 1420 , 1425 , 1430 , 1435 , 1440 , 1445 , 1450 may be raised or lowered so that the coil path continues in a smooth manner, without any sudden ledges or stress points, and with the connection centered at the level of connection.
- point 1420 may be lowered and point 1425 may be raised, as illustrated in FIG. 14C .
- the amount that the points are raiser or lowered by may be one-half of the thickness of the segments 1410 a - d .
- the overall helical path may be set by slight inclines, or a continuous incline, included in supporting structures immediately above and below the coil.
- the supporting structures may be clamped-down on the coil when the bolts are tightened, and can also include starting levels for the four bolts so that the coil may be formed with smooth transitions and minimal deformation in the segments 1410 a - d when the bolts are tightened.
- a similar approach is possible where three bolts are used and segments repeat more frequently, possibly forming a triangular shaped coil. Use of a greater number of bolts is also possible.
- the segments may also be fabricated so that a circular path is formed, rather than a rectangular one.
- connection points 1415 , 1420 , 1425 , 1430 , 1435 , 1440 , 1445 , 1450 may be of half-thickness, where two segments join together to yield the coil path thickness, and the path would continue smoothly. This type of connection may overlap with intermediate segments to a larger degree. Additionally, in some devices, added stress and deformation caused by not raising and lowering the connection points 1415 , 1420 , 1425 , 1430 , 1435 , 1440 , 1445 , 1450 in the segments 1410 a - d may be acceptable, and the tensioning in the bolts may be used to give the segments 1410 a - d their final shape.
- FIG. 15 illustrates another example rotary device 1500 inside a wheel.
- the device 1500 may be attached to the chassis of a vehicle.
- the device 1500 includes a cam 1505 , two opposed electromagnetic actuators 1510 a , 1510 b , a magnetic stator assembly 1520 (including magnetic stators 1515 a , 1515 b ), a support structure 1525 , and fluid dampers 1530 a , 1530 b .
- the rotary device depicted inside the wheel may be attached to the wheel via the cam 1505 as described below.
- FIG. 16A illustrates the example rotary device 1500 with the tire of the wheel, and some other components, removed.
- the device 1500 is similar to the devices described above, but includes a central disc 1635 sandwiched between to pairs of electromagnetic actuators 1510 a , 1510 b , 1610 a , 1610 b and two magnetic stator assemblies 1520 , 1620 .
- Each of the magnetic stator assemblies 1520 , 1620 includes two magnetic stators 1515 a , 1515 b , 1615 a , 1615 b , which include magnetic flux return paths 1640 a - d and magnets (e.g., 1630 a , 1630 b ).
- Each coil reciprocates along four arrays of magnets, which, as described above, may include multiple magnets. Two of the magnet arrays are located inside the coil (e.g., inner magnetic stator component 1630 b ) and two are located outside the coil (e.g., outer magnetic stator component 1630 a ). Each set of magnets are mounted to a magnetic flux return path 1640 a - d.
- the disc 1635 includes two cams, one on either side of the disc 1635 .
- Each cam of the example device is in the form of a grove that includes an inner surface 1605 a and an outer surface 1605 b .
- Coupled to electromagnetic actuators 1510 a and 1510 b are two pairs of followers 1625 a , 1625 b , the different followers of each pair interfacing with a respective surface 1605 a , 1605 b of the cam.
- Electromagnetic actuators 1610 a and 1610 b are similarly coupled to followers. As the coils move towards each other, one of the followers of each electromagnetic actuator 1510 a , 1510 b exerts force on the inner surface 1605 a of the cam. As the coils move away from each other, the other follower exerts force on the outer surface 1605 b of the cam.
- FIG. 16B illustrates a different view of the example rotary device 1500 .
- each pair of electromagnetic actuators (pair 1510 a , 1510 b and pair 1610 a , 1610 b ) are at different phases of reciprocation. This is because, in the example device, the cams on either side of the disc 1635 are rotationally offset from each other by, for example, forty-five degrees. This helps to prevent the actuators from stopping at a point on the cams from which it would be difficult to again start. Thus, if one pair of actuators stops on a “dead-spot” of its respective cam, the other pair of actuators would not be at a dead-spot.
- FIG. 16B also illustrates an arrangement of the coils and magnetic stator components.
- magnetic stators components 1630 b and 1630 c are located inside the coil of actuator 1610 a
- magnetic stators components 1630 a and 1630 d are located outside the coil.
- FIG. 16C illustrates two rotationally offset cams 1505 , 1606 .
- the cams 1505 , 1606 may be part of or mounted on a disc 1635 .
- One cam 1505 may be on one side of the disc 1635 , and the other cam 1606 may be on the opposite side, as indicated by the dashed line.
- the cam may be offset by forty-five degrees, for example.
- the cams 1505 , 1606 may have any even number of lobes. Cams having two lobes, for example, may be offset by forty-five degrees. Cams having four lobes, for example, may be offset by twenty-two and a half degrees.
- FIG. 16D illustrates a vertical cross-section of a disc 1635 with two rotationally offset cams, each having in inner surface 1605 a , 1605 c and an outer surface 1605 b , 1605 d . Due to the offset, the inner surfaces 1605 a , 1605 c are not in line with each other. Likewise, the outer surfaces 1605 b , 1605 d are also not in line with each other.
- FIG. 16E illustrates that the inner and outer surfaces 1605 a , 1605 b of a cam may be shaped in a complex pattern, such as, for example, a shape having an even number of lobes. As noted above, the sides of each lobe may be shaped in the form of a sine wave or portions of an Archimedes spiral, for example.
- the inner and outer surfaces 1605 a , 1605 b illustrated in FIG. 16E each have four lobes.
- FIG. 17A illustrates how the disc 1635 of the example rotary device may be coupled to the rim 1705 of a wheel.
- the rim 1705 may consist of one piece to which the disc 1635 may be affixed using fasteners, such as bolts, along an inner ring 1715 .
- the rim 1705 may include two parts 1710 a , 1710 b that bolt together along ring 1715 . When fastened together, the two parts 1710 a , 1710 b form a full rim 1705 with inner ring 1715 . A tire may then be mounted to the rim 1705 .
- FIG. 17B shows how the disc 1635 may be fastened to the inner ring 1715 of the disc 1635 .
- FIG. 18 illustrates two support structures 1525 , 1825 coupling respective magnetic stator assemblies 1520 , 1620 with electromagnetic actuators 1510 a , 1510 b , 1610 a , 1610 b through a plurality of shafts and fluid dampers 1530 a , 1530 b , 1830 a .
- Support structure 1525 is slidably coupled to magnetic stator assembly 1520 using fluid dampers 1530 a , 1530 b .
- Fluid damper 1530 a may be coupled to the support structure 1525 , for example, at point 1810 and coupled to magnetic stator assembly 1820 a at point 1805 .
- support structure 1825 is slidably coupled to magnetic stator assembly 1620 using fluid damper 1830 a and a corresponding fluid damper (now shown) on the far side of the device.
- FIGS. 19A-19C illustrate an example arrangement of the components of a magnetic stator assembly.
- magnet array 1910 a is an outer magnet array and magnet array 1910 b is an inner magnet array.
- the overall magnetic flux return path 1640 a supports the magnet arrays.
- the particular geometric shape of the example return path 1640 a allows the return path 1640 a to be formed using a cost-effective extrusion process. Specifically, four flux paths may be joined together at a center junction and two end junctions, and many such structures may be cut from a single extrusion.
- a base structure 1920 a on which the magnetic stator components may be mounted.
- FIG. 19B illustrates a component 1905 used to deliver liquid coolant to the magnets, which may be sprayed onto the coils as they pass by the magnets.
- Liquid coolant may be transported from the base structure 1920 a to the magnet arrays 1910 a , 1910 b through a component 1905 that is fastened along the edge of the return path 1640 a .
- the liquid may flow through an opening 1915 in the base structure 1920 a , through a channel 1917 of the component 1905 , and into a chamber 1925 located in a gap formed by parts of the return path 1640 a .
- the liquid coolant may be directed through openings (e.g., holes) in the magnet arrays 1910 a , 1910 b and sprayed onto the coils as they reciprocate by the openings.
- FIG. 19C illustrates four magnetic stators that are coupled to a central mount 1945 . If the rotary device is employed in the wheel of a vehicle, for example, the mount 1945 may be coupled to the chassis of the vehicle.
- FIGS. 20A-20G illustrate the construction of an example coil from one of the electromagnetic actuators.
- FIG. 20A shows an entire coil 2000 from an electromagnetic actuator. It should noted that the coil 2000 may consist of many smaller coils.
- FIG. 20B illustrates four coil segments that are combined into one coil 2005 . A number of such segments may be combined to form the larger coil 2000 of FIG. 20A .
- FIG. 20C is an exploded view 2010 of the coil 2005 of FIG. 20B .
- Each segment 2015 , 2020 , 2025 , 2030 of the example coil may be a flat piece of metal formed by, for example, a stamping or etching process.
- the segments 2015 , 2020 , 2025 , 2030 may be assembled in the configuration shown in FIG. 20C to form a full coil.
- electrical current 2075 may flow through the coil, for example, from starting point 2035 to ending point 2070 .
- the current 2075 may begin at point 2035 and flow counter-clockwise around segment 2015 to point 2040 .
- the current continues to point 2045 as points 2040 and 2045 are in electrical contact with each other when the segments are combined.
- the current 2075 flows counter-clockwise around segment 2020 to point 2050 , where the current continues to point 2055 as described above.
- the current 2075 flows counter-clockwise around segment 2025 to point 2060 , where the current continues to point 2065 , and flows counter-clockwise around segment 2030 to point 2070 .
- each segment may be coated with an electrically-insulating layer of material, except for the surfaces between which the current is meant to propagate, such as the top surface of point 2040 and the bottom surface of point 2045 .
- fasteners such as bolts
- electrically-insulating spacers may be inserted between the points to fill the gaps.
- FIG. 20D shows one coil segment 2015 .
- FIG. 20E shows a second coil segment 2020 stacked on top of segment 2015 .
- FIG. 20E shows a third coil segment 2025 stacked on top of segments 2015 and 2020
- FIG. 20G shows a fourth coil segment 2030 stacked on top of segments 2015 , 2020 , and 2025 , resulting in a full coil as illustrated in FIG. 20B .
- FIG. 21A illustrates a side view of two rotary devices with respective wheels 2105 a , 2105 b .
- FIG. 21B illustrates a top view of the same two devices and wheels 2105 a , 2105 b .
- the two devices are used in tandem and may be used in vehicular applications.
- a vehicle may include four pairs of devices, one pair at each corner of the vehicle.
- Each device includes a magnetic stator assembly, opposed coils, and linear-to-rotary converter (hidden from view).
- the devices are coupled to respective wheels 2105 a , 2105 b and are held together with a central mounting structure 145 .
- the mounting structure 145 may include, or be coupled to, a vertical shaft 2110 for coupling to the chassis of a vehicle.
- the shaft 2110 may allow rotation of the two wheels 2105 a , 2105 b relative to the chassis of the vehicle and about the shaft 2110 .
- FIGS. 22A-22C illustrate example rotations of the wheels 2105 a , 2105 b .
- FIG. 22A shows that the rotary devices may create propulsion for the vehicle by causing both wheels 2105 a , 2105 b to rotate in the same direction.
- FIG. 22B shows that the rotary devices may cause the two wheels to turn with respect to the vehicle by rotating the wheels 2105 a , 2105 b at differential rates. The difference in wheel rotation rates creates propulsion for the vehicle and causes the vehicle to move along a curved path.
- FIG. 22C shows that the rotary devices may cause the two wheels to turn with respect to the vehicle by rotating the wheels 2105 a , 2105 b in opposite directions when the vehicle is not in motion.
- FIGS. 23A and 23B illustrate example vertical movement of the wheels 2105 a , 2105 b .
- FIG. 23A shows that one of the devices may cause its respective wheel 2105 b move in a vertical direction off of the ground.
- the wheel 2105 b may also be rapidly shook in the vertical direction to remove liquid from the surface of the wheel 1205 b .
- both wheels 2105 a , 2105 b may move up or down together to lower or raise the ride height of the vehicle.
- the two wheels 2105 a , 2105 b may even be thrust downward with sufficient force to cause the vehicle to jump.
- FIG. 23A shows that one of the devices may cause its respective wheel 2105 b move in a vertical direction off of the ground.
- the wheel 2105 b may also be rapidly shook in the vertical direction to remove liquid from the surface of the wheel 1205 b .
- both wheels 2105 a , 2105 b may move up or down together to lower or raise the ride height of the vehicle.
- the shaft 2110 may be coupled to the chassis of the vehicle so as to allow for angular movement of the shaft 2110 relative to the chassis by, for example, using a pivot 2305 or similar component to couple the shaft 2110 with the chassis.
- a pivot 2305 or similar component to couple the shaft 2110 with the chassis.
- different vertical movements of the two wheels 2105 a , 2105 b causes the wheels 2105 a , 2105 b to tilt, or camber.
- one wheel 2105 a may move downward and the other wheel 2105 b may move upward, causing the wheels 2105 a , 2105 b , as well as the mount 145 and shaft 2110 to tilt.
- a pivot, or similar component may be used to couple the shaft 2110 with the mount 145 , causing the wheels 2105 a , 2105 b and the mount 145 to tilt, but not the shaft 2110 .
- FIGS. 24A-24F illustrate a top view of a vehicle 2405 having four pairs of rotary devices with respective pairs of wheels 2410 a - d .
- FIG. 24A shows the vehicle 2405 with four pairs of rotary devices and respective wheels 2410 a - d , one pair at each corner of the vehicle 2405 .
- the vehicle may also be configured with different wheel arrangements, such as two pairs of rotary devices and respective wheels at the front corners of the vehicle. In such an arrangement, the wheels at the rear corners of the vehicle may be conventional vehicle wheels.
- all of the wheel pairs 2410 a - d may be oriented in the forward direction to provide forward propulsion for the vehicle.
- FIG. 24A all of the wheel pairs 2410 a - d may be oriented in the forward direction to provide forward propulsion for the vehicle.
- FIG. 24B shows that the two front pairs of wheels 2410 a , 2410 b may be turned to the right, for example, to cause the moving vehicle 2405 to turn to the right.
- FIG. 24C shows that the rear pairs of wheels 2410 c , 2410 d may be turned in a complimentary direction, for example, to the left, to improve the turning radius of the vehicle 2405 .
- FIG. 24D shows that each of the wheel pairs 2410 a - d may be oriented in a direction that is tangential to a circular path to cause the vehicle 2405 to rotate about its center.
- each of the wheel pairs 2410 a - d may be oriented in the same direction, other than the forward direction, to cause the vehicle 2405 to move, for example, diagonally or sideways.
- FIG. 24F shows that each of the wheel pairs 2410 a - d may be pointed toward, or away from, the center of the vehicle to prevent any movement of the vehicle, obviating the need for a parking brake.
- the independent movements of each wheel may be controlled by a respective electrical unit 410 ( FIG. 4B ) and all movements may be coordinated by a central controller 430 ( FIG. 4B ) in communication with the electrical units.
Abstract
Description
- This application is a continuation of U.S. application Ser. No. 14/144,929, filed on Dec. 31, 2013, which is a divisional of U.S. application Ser. No. 12/590,493, filed on Nov. 9, 2009, now U.S. Pat. No. 8,624,699, issued on Jan. 7, 2014. The entire teachings of the above applications are incorporated herein by reference.
- Electric motors convert electrical energy to mechanical energy through the interaction of magnetic fields and a current-carrying medium, which is typically a coiled wire. Electric generators convert mechanical energy to electrical energy by forcing electric charges to move through an electrical circuit, which is also typically a coiled wire.
- Coils used with electric motors or generators typically consist of a single continuous piece of material wound into a coil. Manufacture of a flat, square cross-section coil can be very expensive if made from one continuous piece of material. Instead of being made from one continuous piece of material, an electric coil may include multiple flat coil segments stacked together and electrically coupled in series, where each coil segment is rotated with respect to the coil segment it follows in the stack. Manufacturing of the coil segments may be much less expensive, and the segments can be combined into a single coil. For example, each coil segment may be U-shaped and may be rotated 270 degrees with respect to the coil segment it follows in the stack of coil segments. A method of manufacturing such an electric coil includes fabricating multiple flat coil segments, stacking together and electrically coupling the multiple coil segments in series where each coil segment is rotated with respect to the coil segment it follows, and fastening the coil segments together to form the electric coil.
- The coil segments may be inexpensively formed by stamping or etching and bending the coil segments from a flat sheet of metal, for example. All sides of a coil segment may be equal in length or, alternatively, adjacent sides of a coil segment may be different lengths while opposite sides of the coil segment may be equal lengths. The coil may further include electrically-insulating material on portions of the coil segments. In a stack of coils segments, for example, all surfaces of the coil segments may be coated with an electrically-insulating layer of material except for the top surface of the finishing end of a lower coil segment in the stack and the bottom surface of the starting end of an immediately upper coil segment in the stack. The segments may be fastened together using bolts, for example, that may be inserted through the corners of the coil segments. A layer of electrically-insulating material may also cover the bolts. When assembled, electrically-insulating spacers may be placed in any gaps between the coil segments.
- This application relates to U.S. patent application titled “ELECTRIC MOTOR” by inventor Ian W. Hunter (Attorney Docket No. 4489.1000-000), U.S. patent application titled “ELECTRIC GENERATOR” by inventor Ian W. Hunter (Attorney Docket No. 4489.1002-000), and U.S. patent application titled “TUNABLE PNEUMATIC SUSPENSION” by inventor Ian W. Hunter (Attorney Docket No. 4489.1004-000). These applications are being filed concurrently with the present application, and the contents of these applications are incorporated herein by reference in their entirety.
- The foregoing will be apparent from the following more particular description of example embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters refer to the same parts throughout the different views. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating embodiments of the present invention.
-
FIGS. 1A and 1B illustrate example rotary devices. -
FIG. 1C illustrates an example magnetic stator assembly. -
FIGS. 1D-1F illustrate cross-sections of example rotary devices. -
FIGS. 2A-2C illustrate components of an example rotary device in action. -
FIG. 2D illustrates an example shape of a cam. -
FIGS. 2E-2H illustrate an example rotary device in action and coupled to a wheel. -
FIGS. 3A and 3B illustrate an example rotary device with an additional cam and magnetic stator components. -
FIG. 4A illustrates a mount attached to the magnetic stator assembly of an example rotary device. -
FIG. 4B illustrates a simplified cross-section of an example rotary device attached to the chassis of a vehicle. -
FIGS. 5A-5D illustrate a support structure coupling a magnetic stator assembly and mount of an example rotary device with electromagnetic actuators and coils of the device through a plurality of shafts. -
FIG. 6A illustrates a rotary bearing coupling a support structure of an example rotary device with a cam of the device. -
FIG. 6B illustrates a wheel structure coupling a cam of an example rotary device with a wheel of a vehicle. -
FIG. 7 illustrates a horizontal cross-section of an example rotary device. -
FIG. 8 illustrates a horizontal cross-section of an example rotary device from a top-down view. -
FIG. 9 illustrates an inner structure of a magnetic stator assembly of an example rotary device. -
FIG. 10 illustrates a horizontal cross-section of an example rotary device. -
FIG. 11 illustrates a horizontal cross-section of an example rotary device. -
FIG. 12A illustrates a vertical cross-section of an example rotary device showing how a support structure of an example rotary device may be arranged. -
FIGS. 12B-12D illustrate an example tunable pneumatic suspension. -
FIGS. 13A and 13B illustrate an example rotary device at different vertical positions. -
FIGS. 14A-14C illustrate the construction of an example coil of an electromagnetic actuator. -
FIG. 15 illustrates a wheel that includes an example rotary device. -
FIGS. 16A and 16B illustrate different views of an example rotary device. -
FIGS. 16C and 16D illustrate two rotationally offset cams. -
FIG. 16E illustrates an example shape of a cam. -
FIGS. 17A and 17B illustrate a disc of an example rotary device coupled to a rim of a wheel. -
FIG. 18 illustrates two support structures coupling respective magnetic stator assemblies with electromagnetic actuators through a plurality of shafts and fluid dampers. -
FIGS. 19A-19C illustrate an example arrangement of magnetic stators. -
FIGS. 20A-20G illustrate the construction of an example coil of an electromagnetic actuator. -
FIGS. 21A and 21B illustrate a side view and a top view of two rotary devices with respective wheels. -
FIGS. 22A-22C illustrate various different rotations of the wheels. -
FIGS. 23A and 23B illustrate vertical movement of the wheels. -
FIGS. 24A-24F illustrate a top view of a vehicle having four pairs of rotary devices with respective wheels. - A description of example embodiments of the invention follows.
-
FIG. 1A shows anexample rotary device 100 inside a wheel. The device includes amagnetic stator assembly 120, opposedelectromagnetic actuators cam 105 using a circular plate, for example, which has been removed to show the inside of the wheel. Such a plate may be attached to both the rim of the wheel and thecam 105 using fasteners, such as bolts. The wheel and cam support plate rotate relative to ahub 145 about abearing 150. It is important to note that thecam 105 is shown as an oval shape, but may take other forms, such as, for example, a cam having multiple lobes. -
FIG. 1B shows theexample rotary device 100 from the side of thewheel 140 and with the tire of thewheel 140, and some other components, removed. The core of the rotary device includes thecam 105, two opposedelectromagnetic actuators magnetic stator assembly 120. Theelectromagnetic actuators coil magnetic stator assembly 120. Oneelectromagnetic actuator 110 a is shown having ahousing 155 a surrounding itscoil 115 a and the otherelectromagnetic actuator 110 b is shown with its housing removed to show itscoil 115 b. - The
magnetic stator assembly 120 depicted inFIG. 1B is oriented vertically and may include a plurality ofmagnetic stators magnetic stators coils electromagnetic actuators actuators magnetic stator assembly 120 due to the resulting electromagnetic forces. As known in the art, when a coil carrying an electrical current is placed in a magnetic field, each of the moving charges of the current experiences what is known as the Lorentz force, and together they create a force on the coil. As depicted, therotary device 100 may include a plurality ofshafts bearing support structure 165. Theelectromagnetic actuators electromagnetic actuator cam 105. To reduce friction, the followers 135 a-d may spin to roll over the surfaces of thecam 105. The followers 135 a-d may be attached to theelectromagnetic actuators electromagnetic actuators cam 105 drives thecam 105 in rotary motion. -
FIG. 1C illustrates an examplemagnetic stator assembly 120 with twomagnetic stators magnetic stators magnetic stator 125 a includes, on one surface of thestator 125 a, eight magnets 160 a-h. -
FIGS. 1D-1F illustrate simplified cross-sections of example rotary devices. The device ofFIG. 1D is within awheel 140 of a vehicle and includes a hub (or mount) 145 coupled to amagnetic stator assembly 120 having twomagnetic stators magnetic stator assembly 120 alongshafts shafts bearing support structure 165, keep the components of the device in vertical alignment, and prevent thewheel 140 from falling off of the device. Acam plate 170 coupled to thewheel 140 is rotatably coupled to thebearing support 165 through abearing 150. Affixed to thecam plate 170 is acam 105 used to drive theplate 170 and, thus, thewheel 140 in rotary motion. Thecam 105 is driven by the reciprocation of theelectromagnetic actuators electromagnetic actuators cam 105. Also included in the example device is afluid damper 175 a coupling thebearing support 165 and themount 145. Thefluid damper 175 a suspends themount 145 above the ground and may allow for some movement between the bearingsupport 165 and themount 145, depending on the amount of resistance of the damper. For example, if the damper is a pneumatic damper, higher gas pressures inside the chambers of the damper allow for less movement than lower air pressures. -
FIG. 1E illustrates that in the absence of thefluid damper 175 a, the electromagnetic forces caused by theelectromagnetic actuators magnetic stators mount 145 above the ground. If, however, electrical current is removed from theelectromagnetic actuators mount 145 may drop toward the ground, along with themagnetic stator assembly 120 and vehicle chassis, as illustrated inFIG. 1F . -
FIGS. 2A-2C illustrate components of therotary device 100 in action, including the rotary device'selectromagnetic actuators coils cam 105 moving relative to the magnetic stator assembly 120 (including associatedmagnetic stators FIGS. 2A-2C , the reciprocal movement of thecoils cam 105 to rotate, which, in turn, may cause a wheel attached to thecam 105 to rotate. Thecoils FIG. 2A as being at almost their furthest distance apart.FIG. 2B shows that as thecoils coils cam 105 to rotate in a clockwise direction, thereby causing any attached wheel to also rotate clockwise. In the example device, the force exerted on thecam 105 is caused by theouter followers cam 105.FIG. 2C shows that thecoils cam 105. - After the
coils cam 105, in this case, has rotated ninety degrees, thecoils cam 105 to continue to rotate clockwise. As thecoils inner followers cam 105 by pushing outward on thecam 105. Again, it is important to note that thecam 105 is shown in the figures as an oval shape, but thecam 105 may be shaped in a more complex pattern, such as, for example, a shape having an even number of lobes, as illustrated inFIG. 2D . The sides of each lobe may be shaped in the form of a sine wave or a portion of an Archimedes spiral, for example. The number of lobes determines how many cycles the coils must complete to cause the cam to rotate full circle. A cam with two lobes will rotate full circle upon two coil cycles. A cam with four lobes will rotate full circle upon four coil cycles. Additionally, more lobes in a cam creates a higher amount of torque. In addition to driving the cam in rotational motion, the electromagnetic actuators may act as generators by drawing current from the coils as the cam rotates. This also has the effect of reducing the rotational movement of the cam when energy is absorbed from the rotational movement of the cam. In an application of the device in a vehicle, drawing current from the coils may act as a regenerative braking mechanism for the vehicle. Because the devices may act as generators, rotation of the wheel caused by an outside force may recharge the batteries of a vehicle. For example, the vehicle may be positioned so that at least one of its wheels is placed on a recharging device that causes the wheel to rotate. Such a recharging device may be similar to a dynamometer, which may be placed on or in a floor. But while a vehicle causes a dynamometer to rotate, it is the rotation of the recharging device that causes the vehicle's wheel to rotate, thereby causing the electromagnetic actuators to act as generators and to charge the vehicle's batteries. The recharging device may be powered by, for example, electricity or fuel. - In some devices, heat produced by the reciprocation of the
coils coils openings 146 in the magnets of themagnetic stators coils openings 146. The liquid coolant may be transported to theopenings 146 through channels in themagnetic stator assembly 120. The sprayed liquid may then be collected for reuse or may be allowed to convert to a gas and be vented from the rotary device. -
FIGS. 2E-2H also illustrate components of an example rotary device in action, but with awheel 140 that is attached to thecam 105 through a plate, or similar structure (not shown). A white circle appears on thewheel 140 to show the wheels position at different points during reciprocation of theelectromagnetic actuators wheel 140 rotates along with therotating cam 105. -
FIG. 3A illustrates a rotary device similar to the device ofFIGS. 2A-2C , but with anadditional cam 106 on the other side of themagnetic stator assembly 120. Reciprocation of thecoils second cam 106 in rotary motion, and thesecond cam 106 may be attached to the other side of a wheel using, for example, another circular plate. Also shown is that themagnetic stator assembly 120 of the example device may be in the shape of a long extended box-shaped core of magnetically permeable material, with amagnetic stator magnetic stator magnetic stator assembly 120. The box-shaped core, on which themagnetic stators magnetic stators FIG. 3A is that thecoils magnetic stators coils magnetic stators -
FIG. 3B illustrates the rotary device ofFIG. 3A , but withadditional magnets coils magnetic stator assembly 120 includes an additional four magnet arrays, one on each side of a rectangular cross-section coil 315 a, 315 b. Theadditional magnets FIG. 3B is an additionalmagnetic return path 320 for theadditional magnets -
FIG. 4A illustrates amount 145 to which themagnetic stator assembly 120, including magnets and return paths, may be attached. The mount may be part of, or further attached to, for example, a chassis of a vehicle (not shown). Specifically, themount 145 includes outer andinner hub plates coils FIG. 4A ) that extend from themount 145 to thecoils coils magnetic stator assembly 120. Thus, the flexures may electrically couple to an electrical supply (not shown inFIG. 4A ), such as a battery, coupled to the mount or located in the chassis of a vehicle, the supply delivering electrical current to thecoils -
FIG. 4B illustrates a simplified cross-section of an example rotary device attached to the chassis of avehicle 405.FIG. 4B is similar toFIGS. 1D-1F , but with some components removed for clarity. The figures shows amount 145 coupled to the chassis of avehicle 405 and amagnetic stator assembly 120. Also shown are acam 105,cam plate 170,wheel 140, bearing 150, andelectromagnetic actuators mount 145 is anelectrical unit 410, which is used to deliver electricity to theelectromagnetic actuators flexures 415 a, 415 b. Also coupled to themount 145 is abattery 420 for storing electrical energy. Although theelectrical unit 410 and thebattery 420 are shown as being coupled to themount 145, theelectrical unit 410,battery 420, or both may, instead, be coupled to the support structure 165 (FIG. 1D ). - According to the example rotary device, the
electrical unit 410 may be controlled by acontroller 430 on the chassis of thevehicle 405 and through a fiber-optic cable 435 running between thecontroller 430 and theelectrical unit 410. The example rotary device also includes abidirectional power line 440 connecting theelectrical unit 410 and thebattery 420. During operation as a motor, power may flow from thebattery 420 to theelectrical unit 410 and on to theelectromagnetic actuators electromagnetic actuators electrical unit 410 and on to thebattery 420. The vehicle may also include acharger 425 for charging thebattery 420 using an external power source (not shown), such as an electrical outlet or gasoline engine in the case of a hybrid vehicle. During such charging, power flows from the external power source to thecharger 425 and on to thebattery 420 throughline 427, theelectrical unit 410, and thebidirectional power line 440. Thus, thebattery 420 may be charged by either an external power source or by the rotary device acting as a generator. - Through delivery of electricity to the
electromagnetic actuators electrical unit 410 may control the reciprocation of the coils. For example, when at speed, theelectrical unit 410 may control the constant reciprocation of the coils. In vehicular embodiments, thecontroller 430 may be operated by a driver (not shown) of a vehicle and, in response to actions by the driver, thecontroller 430 may send commands to theelectrical unit 410 to cause the rotary device to accelerate, decelerate, or change direction, for example. In addition, theelectrical unit 410 may be configured to provide an electrical component to theelectromagnetic actuators wheel 140. Any translational movement of thewheel 140, caused by the rotary device or not, may be sensed by theelectrical unit 410. In some configurations, theelectrical unit 410 may be configured to absorb energy from the translational movement of the wheel by causing theelectromagnetic actuators battery 420 for storage. -
FIG. 5A illustrates a bearingsupport structure 165. A rotary bearing (not shown) that supports the cam plate and, thus, the wheel is mounted to aflange 585. Thebearing support 165 and theelectromagnetic actuators coils support structure 165 allows themagnetic stator assembly 120,mount 145, and chassis of the vehicle (not shown) to remain suspended above the ground without electrical power. In the absence of thesupport structure 165, themagnetic stator assembly 120,mount 145, and vehicle chassis may drop toward the ground when current is not applied to thecoils support structure 165 and theelectromagnetic actuators electromagnetic actuators magnetic stator assembly 120,mount 145, and vehicle chassis off the ground. Thesupport structure 165, on the other hand, may use fluid dampers (not shown) for suspension. - The
support structure 165 also enables the use of multiple flexures in series for delivering electricity to the coils. For example, one set of flexures may run between themount 145 and thesupport structure 165, and another set of flexures may run between thesupport structure 165 and thecoils bearing support 165 moves in a vertical direction. During such vertical movement of thebearing support 165 and reciprocation of thecoils bearing support 165, and the other set of flexures may flex with respect to the reciprocation of thecoils mount 145 and thecoils bearing support 165 and reciprocation of thecoils -
FIG. 5B illustrates themagnetic stator assembly 120,mount 145, and vehicle chassis as being raised with respect to the other components of the rotary device. This is accomplished either by adding an electrical component to thecoils support structure 165, as described below. The vertical movement of thecoils coils coils -
FIG. 5C shows a horizontal cross-section through the device showing thesupport structure 165 as surrounding, but not coupled to, themount 145. Also shown are a plurality of shafts 130 a-d coupled to the support structure to maintain alignment among the components of the rotary device. A plurality of fluid dampers 175 a-d, described below, are also shown. -
FIG. 5D illustrates the side of an example rotary device including one pair offlexures components mount 145 and thesupport structure 165, and another pair offlexures support structure 165 and theelectromagnetic actuators -
FIG. 6A illustrates arotary bearing 150 used to couple the bearingsupport structure 165 with one of thecams 105. Aninner race 650 a is coupled to thebearing support 165 and anouter race 650 b couples a wheel structure (not shown), such as a cam plate and, thus, to thecam 105 and outer wheel rim. The wheel structure may be a plate, a plurality of spokes, a lattice, or other appropriate structure as known in the art. Therotary bearing 150 is not coupled directly to themount 145, but rather, in the example device, through a fluid damper. Another rotary bearing (not shown) may be used to couple thesupport structure 165 with theother cam 105 on the other side of the rotary device. Because the rotary bearing 150 rotatably couples the bearingsupport structure 165 with an outer wheel rim, thesupport structure 165 and wheel have the same vertical position with respect to each other. Because of its constant vertical position with respect to the wheel, the shafts 130 a-d may be fixed to thesupport structure 165, thereby preventing the shafts from coming into contact with the wheel. -
FIG. 6B illustrates awheel structure 605 coupling acam 105 of an example rotary device with awheel rim 140 of a vehicle. As illustrated, thecam 105 is fixed to thewheel structure 605, and thewheel structure 605 is fixed (e.g., using bolts) to the wheel 104 rim. Rotation of thecam 105, thus, causes rotation of thewheel structure 605 and the wheel 104. -
FIG. 7 shows a horizontal cross-section of an example rotary device. The cross-section is cut through one of the electromagnetic actuators 155. Inside the electromagnetic actuator 155 is shown acoil 115 a and the components of themagnetic stator assembly 120. According to the illustrated device, themagnetic stator assembly 120 includes an innermagnetic stator component 125 a, including a plurality of magnets, and an outermagnetic stator component 325 a, also including a plurality of magnets. Themagnetic stator assembly 120 also includes an inner magneticflux return path 725 a for the innermagnetic stator component 125 a and includes an outer magneticflux return path 735 a for the outermagnetic stator component 325 a. As described above, the innermagnetic stator component 125 a and inner magneticflux return path 725 a are located inside of thecoil 115 a, and the outermagnetic stator component 325 a and outer magneticflux return path 735 a are located outside of thecoil 115 a. Also shown in the cross-section is the housing of the electromagnetic actuator 155, which surrounds thecoil 115 a andmagnetic stator assembly 120 and slides along the long axis of themagnetic stator assembly 120 by sliding along a plurality of shafts 130 a-d. The housing of the electromagnetic actuator 155 may hold thecoil 115 a using, for example, four bolts that run through the corners of the rectangular-shapedcoil 115 a. -
FIG. 8 shows another cross-section of the example rotary device, but from a top-down view. As inFIG. 7 , the cross section shows acoil 115 a, innermagnetic stator component 125 a, outermagnetic stator component 325 a, inner magneticflux return path 725 a, outer magneticflux return path 735 a,electromagnetic actuator housing 155 a, and shafts 130 a-d. The innermagnetic stator component 125 a and inner magneticflux return path 725 a are mounted to aninner structure 820 of an example magnetic stator assembly. As can be seen,bolts 815 having electrically insulatingcover material 817 may be inserted throughbolt holes 816 at the corners of thecoil 115 a to fix thecoil 115 a to thehousing 155 a. -
FIG. 9 illustrates aninner structure 820 of an example magnetic stator assembly. A mount 145 (FIG. 4A ) may be attached atpoint 910 to, for example, couple thestructure 820 to the chassis of a vehicle. Channels 905 a-d may be used to transport a cooling fluid within the magnetic stator assembly to spray on the coils through the magnets. -
FIG. 10 shows a cross-section of the example rotary device. The cross-section is cut through the middle of the device and shows theinner structure 820 of the magnetic stator assembly,mount 145, inner magneticflux return path 725 a, and outer magneticflux return path 735 a. The cross-section also shows achannel 1005 used to access the inner part of the magnetic stator assembly for running wires or cooling fluid, for example. -
FIG. 11 shows another cross-section of a rotary device as inFIG. 10 , but at a point slight higher than the cross-section ofFIG. 10 . In addition to thechannel 1005 for running wires or cooling lines, the cross-section shows channels 1105 a-d for inserting fasteners, such as screws. -
FIG. 12A shows a vertical cross-section of the example rotary device. The cross-section shows how the support structure illustrated inFIGS. 5A and 5B may be slidably coupled to the magnetic stator assembly and themount 145 usingadditional shafts fluid dampers FIG. 12A , thesupport structure 165 may be coupled to the lower rod of afluid damper 175 a. Specifically, a connectingarm 1215 a pinned at point 1225 a to the lower end of therod 1220 a is joined to the support atpoint 1205. An upper rod of thefluid damper 175 a may be connected to themount 145 of the device, which may be part of a vehicle's chassis. Themount 145 joinssuspension arm 1240 a atpoint 1210. Theshaft 1230 a, fixed to thesupport 165, slides through thesuspension arm 1240 a at opposite ends. The upper rod of thedamper 175 a is pinned to thesuspension arm 1240 a atpoint 1235 a. - The
fluid dampers dampers mount 145, pressure in the gas chambers may be adjusted so that the chambers have different pressures. For example, if thefluid dampers mount 145 in the upward direction, and more pressure would be applied to the bottom chamber to move the magnetic stator assembly and themount 145 in the downward direction. To change the stiffness of thedampers mount 145 can change the ride height of the vehicle, and changing the stiffness of thedampers - The cross-section of
FIG. 12A also shows the inside of the magnetic stator assembly. An example arrangement of thecoil 115 b of an electromagnetic actuator, insidemagnetic stator component 125 b, and outsidemagnetic stator component 325 b can be seen through the cross-section. Also visible is the magneticflux return path 735 b for the outsidemagnetic stator component 325 b. -
FIGS. 12B-12D illustrate an example tunable pneumatic suspension.FIG. 12B shows that thesuspension 175 a includes apiston 1276 and opposedchambers opposite faces piston 1276. Theexample suspension 175 a includes atop chamber 1277 a and abottom chamber 1277 b. Also shown is apneumatic controller 1279 that independently controls the pneumatic pressures in thechambers - The pressures of the
chambers piston 1276 and thechambers FIG. 12C , a higher pressure in thebottom chamber 1277 b of thesuspension 175 a, as compared to thetop chamber 1277 a, exerts more force on thebottom face 1278 b of thepiston 1276, causing thepiston 1276 and thebottom chamber 1277 b to move away from each other. As shown inFIG. 12D , a higher pressure in thetop chamber 1277 a, as compared to thebottom chamber 1277 b, exerts more force on thetop face 1278 a of thepiston 1276, causing thepiston 1276 and thetop chamber 1277 a to move to move away from each other. If thesuspension 175 a is part of a vehicle, this movement can change the ride height of the vehicle, the direction of the vehicle's movement depending on whether thechambers piston 1276 are coupled to the chassis of the vehicle. Either thechambers piston 1276 may be grounded, while the other is coupled to the chassis of the vehicle. - In addition to changing the position of the
piston 1276, the pressures of thechambers suspension 175 a by adding or removing equal pressures to or from thechambers chambers suspension 175 a, and removing equal pressures from bothchambers suspension 175 a. If thesuspension 175 a is part of a vehicle, changing the stiffness of thesuspension 175 a can change the stiffness of the vehicle's ride. -
FIG. 13A illustrates an example rotary device incorporating many of the above-described features. The rotary device includes, for example, acam 105, two opposed electromagnetic actuators (including anexample housing 155 a andcoil 115 b), a magnetic stator assembly (including an example innermagnetic stator component 125 b, outermagnetic stator component 325 b, and outer magneticflux return path 735 b for the outermagnetic stator component 325 b),mount 145,suspension arms support structure 165,rotary bearing 150,shafts fluid dampers -
FIG. 13B illustrates the rotary device ofFIG. 13A , but where thefluid dampers mount 145 by, for example, applying more pressure to a top chamber within each of thefluid dampers FIG. 13B , thefluid dampers suspension arms mount 145 are in a vertically higher position than illustrated inFIG. 13A . -
FIGS. 14A-14C illustrate the construction of an example coil from one of the electromagnetic actuators. Instead of being made from one continuous piece of material, the coil may include multiple flat coil segments stacked together and electrically coupled in series.FIG. 14A illustrates four coil segments that are combined into onecoil 1400. The coil of a given electromagnetic actuator may include a number of such coils.FIG. 14B illustrates one of thecoil segments 1401.FIG. 14C illustrates an explodedview 1405 of the coil ofFIG. 14A . Each segment 1410 a-d of the example coil may be a flat, U-shaped piece of metal formed by, for example, a stamping or etching process. The segments 1410 a-d may be assembled in the configuration shown inFIG. 14C to form a full coil. -
FIG. 14C shows four U-shaped coil segments 1410 a-d that are stacked on top of each other, where each segment is rotated 270 degrees (or 90 degrees depending on the direction of rotation) with respect to the coil segment it follows in the stack of coil segments. In stacking the segments 1410 a-d in rotated positions, the segments 1410 a-d may be positioned so that a startingend 1425 of anupper coil segment 1410 b in the stack interfaces a finishingend 1420 of an immediatelylower coil segment 1410 a in the stack. The coil including the four U-shaped coil segments 1410 a-d, for example, loops around three times to finish at the same relative position (e.g., ends 1415 and 1450) that it started. - Electric current may flow through the coil, for example, from a starting end of a bottom-most coil segment in the stack to a finishing end of a top-most coil segment in the stack. In the example coil, when assembled, electrical current 1455 may flow through the coil, for example, from a
starting point 1415 to anending point 1450. The current 1415 may begin atpoint 1415 and flow counter-clockwise aroundsegment 1410 a topoint 1420. Atpoint 1420, the current continues to point 1425 aspoints FIG. 14A . Frompoint 1425, the current 1415 flows counter-clockwise aroundsegment 1410 b topoint 1430, where the current continues to point 1435 as described above. Frompoint 1435, the current 1415 flows counter-clockwise aroundsegment 1410 c topoint 1440, where the current continues to point 1445, and flows counter-clockwise aroundsegment 1410 d topoint 1450. If combined with other segments, the current may continue to flow from one segment to a subsequent segment in a longer coil. Overall, a method of manufacturing such an electric coil includes fabricating the multiple flat coil segments, stacking the multiple coil segments together where each coil segment is rotated with respect to the coil segment it follows, and fastening the coil segments together to form the electric coil. - To prevent the electrical current from straying from the above-described path, each segment may be coated with an electrically-insulating layer of material, except for the surfaces between which the current is meant to propagate, such as the top surface of
point 1420 and the bottom surface ofpoint 1425. Alternatively, instead of being coated, layers of electrically-insulating material may be inserted between the coil segments. When the coil segments 1410 a-d are assembled in the form illustrated inFIG. 14A , fasteners, such as bolts, may be inserted through the openings shown atpoints points points points - The coil segments 1410 a-d may be mechanically and electrically joined together using bolts that pass through openings included in the segments 1410 a-d, where the openings are positioned outside the coil path so that a continuous, helical, flat coil may be formed. Fabricating coil segments at a constant thickness may be simple and inexpensive, but, at a constant thickness, the coil segment connections may occur outside the coil path so that intermediate segments do not overlap with the connection points. The shape of the connection points 1415, 1420, 1425, 1430, 1435, 1440, 1445, 1450 may be chosen so that there is adequate contact area for a good mechanical connection that produces an acceptable contact resistance between the segments. The coil segments may be electroplated, with gold or nickel for example, to further reduce the contact resistance.
- The connection points 1415, 1420, 1425, 1430, 1435, 1440, 1445, 1450 may be raised or lowered so that the coil path continues in a smooth manner, without any sudden ledges or stress points, and with the connection centered at the level of connection. For example, for the connection between
segments point 1420 may be lowered andpoint 1425 may be raised, as illustrated inFIG. 14C . The amount that the points are raiser or lowered by may be one-half of the thickness of the segments 1410 a-d. The overall helical path may be set by slight inclines, or a continuous incline, included in supporting structures immediately above and below the coil. The supporting structures may be clamped-down on the coil when the bolts are tightened, and can also include starting levels for the four bolts so that the coil may be formed with smooth transitions and minimal deformation in the segments 1410 a-d when the bolts are tightened. A similar approach is possible where three bolts are used and segments repeat more frequently, possibly forming a triangular shaped coil. Use of a greater number of bolts is also possible. The segments may also be fabricated so that a circular path is formed, rather than a rectangular one. - Instead of including raised and lowered sections in the coil segments 1410 a-d, the connection points 1415, 1420, 1425, 1430, 1435, 1440, 1445, 1450 may be of half-thickness, where two segments join together to yield the coil path thickness, and the path would continue smoothly. This type of connection may overlap with intermediate segments to a larger degree. Additionally, in some devices, added stress and deformation caused by not raising and lowering the connection points 1415, 1420, 1425, 1430, 1435, 1440, 1445, 1450 in the segments 1410 a-d may be acceptable, and the tensioning in the bolts may be used to give the segments 1410 a-d their final shape.
-
FIG. 15 illustrates anotherexample rotary device 1500 inside a wheel. As with the devices described above, thedevice 1500 may be attached to the chassis of a vehicle. Thedevice 1500 includes acam 1505, two opposedelectromagnetic actuators magnetic stators support structure 1525, andfluid dampers cam 1505 as described below. -
FIG. 16A illustrates theexample rotary device 1500 with the tire of the wheel, and some other components, removed. Thedevice 1500 is similar to the devices described above, but includes acentral disc 1635 sandwiched between to pairs ofelectromagnetic actuators magnetic stator assemblies magnetic stator assemblies magnetic stators electromagnetic actuators magnetic stator component 1630 b) and two are located outside the coil (e.g., outermagnetic stator component 1630 a). Each set of magnets are mounted to a magnetic flux return path 1640 a-d. - The
disc 1635 includes two cams, one on either side of thedisc 1635. Each cam of the example device is in the form of a grove that includes aninner surface 1605 a and anouter surface 1605 b. Coupled toelectromagnetic actuators followers respective surface Electromagnetic actuators electromagnetic actuator inner surface 1605 a of the cam. As the coils move away from each other, the other follower exerts force on theouter surface 1605 b of the cam. -
FIG. 16B illustrates a different view of theexample rotary device 1500. It should be apparent that each pair of electromagnetic actuators (pair pair disc 1635 are rotationally offset from each other by, for example, forty-five degrees. This helps to prevent the actuators from stopping at a point on the cams from which it would be difficult to again start. Thus, if one pair of actuators stops on a “dead-spot” of its respective cam, the other pair of actuators would not be at a dead-spot. Alternatively, if the cams were not offset from each other, or if only one cam were used, a controller may control the rotation of the cam so that the actuators do not stop on a dead spot.FIG. 16B also illustrates an arrangement of the coils and magnetic stator components. For example,magnetic stators components magnetic stators components -
FIG. 16C illustrates two rotationally offsetcams cams disc 1635. Onecam 1505 may be on one side of thedisc 1635, and theother cam 1606 may be on the opposite side, as indicated by the dashed line. In some devices the cam may be offset by forty-five degrees, for example. Thecams -
FIG. 16D illustrates a vertical cross-section of adisc 1635 with two rotationally offset cams, each having ininner surface outer surface inner surfaces outer surfaces -
FIG. 16E illustrates that the inner andouter surfaces outer surfaces FIG. 16E each have four lobes. -
FIG. 17A illustrates how thedisc 1635 of the example rotary device may be coupled to therim 1705 of a wheel. Therim 1705 may consist of one piece to which thedisc 1635 may be affixed using fasteners, such as bolts, along aninner ring 1715. Alternatively, therim 1705 may include twoparts ring 1715. When fastened together, the twoparts full rim 1705 withinner ring 1715. A tire may then be mounted to therim 1705.FIG. 17B shows how thedisc 1635 may be fastened to theinner ring 1715 of thedisc 1635. -
FIG. 18 illustrates twosupport structures magnetic stator assemblies electromagnetic actuators fluid dampers Support structure 1525 is slidably coupled tomagnetic stator assembly 1520 usingfluid dampers Fluid damper 1530 a may be coupled to thesupport structure 1525, for example, atpoint 1810 and coupled to magnetic stator assembly 1820 a atpoint 1805. Likewise,support structure 1825 is slidably coupled tomagnetic stator assembly 1620 usingfluid damper 1830 a and a corresponding fluid damper (now shown) on the far side of the device. -
FIGS. 19A-19C illustrate an example arrangement of the components of a magnetic stator assembly. Referring toFIG. 19A ,magnet array 1910 a is an outer magnet array andmagnet array 1910 b is an inner magnet array. The overall magneticflux return path 1640 a supports the magnet arrays. The particular geometric shape of theexample return path 1640 a allows thereturn path 1640 a to be formed using a cost-effective extrusion process. Specifically, four flux paths may be joined together at a center junction and two end junctions, and many such structures may be cut from a single extrusion. Also illustrated is abase structure 1920 a on which the magnetic stator components may be mounted. -
FIG. 19B illustrates acomponent 1905 used to deliver liquid coolant to the magnets, which may be sprayed onto the coils as they pass by the magnets. Liquid coolant may be transported from thebase structure 1920 a to themagnet arrays component 1905 that is fastened along the edge of thereturn path 1640 a. The liquid may flow through anopening 1915 in thebase structure 1920 a, through achannel 1917 of thecomponent 1905, and into achamber 1925 located in a gap formed by parts of thereturn path 1640 a. From inside thechamber 1925, the liquid coolant may be directed through openings (e.g., holes) in themagnet arrays -
FIG. 19C illustrates four magnetic stators that are coupled to acentral mount 1945. If the rotary device is employed in the wheel of a vehicle, for example, themount 1945 may be coupled to the chassis of the vehicle. -
FIGS. 20A-20G illustrate the construction of an example coil from one of the electromagnetic actuators.FIG. 20A shows anentire coil 2000 from an electromagnetic actuator. It should noted that thecoil 2000 may consist of many smaller coils.FIG. 20B illustrates four coil segments that are combined into onecoil 2005. A number of such segments may be combined to form thelarger coil 2000 ofFIG. 20A .FIG. 20C is an explodedview 2010 of thecoil 2005 ofFIG. 20B . Eachsegment segments FIG. 20C to form a full coil. When assembled, electrical current 2075 may flow through the coil, for example, fromstarting point 2035 to endingpoint 2070. For example, the current 2075 may begin atpoint 2035 and flow counter-clockwise aroundsegment 2015 topoint 2040. Atpoint 2040, the current continues to point 2045 aspoints point 2045, the current 2075 flows counter-clockwise aroundsegment 2020 topoint 2050, where the current continues to point 2055 as described above. Frompoint 2055, the current 2075 flows counter-clockwise aroundsegment 2025 topoint 2060, where the current continues to point 2065, and flows counter-clockwise aroundsegment 2030 topoint 2070. - As described above, to prevent the electrical current from straying from the above-described path, each segment may be coated with an electrically-insulating layer of material, except for the surfaces between which the current is meant to propagate, such as the top surface of
point 2040 and the bottom surface ofpoint 2045. When the coil segments are assembled in the form illustrated inFIG. 20B , fasteners, such as bolts, may be inserted through the openings of the segments. When the segments are assembled, there may remain gaps between some of the above points. To allow the fasteners to tightly secure the segments together, electrically-insulating spacers may be inserted between the points to fill the gaps. -
FIG. 20D shows onecoil segment 2015.FIG. 20E shows asecond coil segment 2020 stacked on top ofsegment 2015.FIG. 20E shows athird coil segment 2025 stacked on top ofsegments FIG. 20G shows afourth coil segment 2030 stacked on top ofsegments FIG. 20B . -
FIG. 21A illustrates a side view of two rotary devices withrespective wheels FIG. 21B illustrates a top view of the same two devices andwheels respective wheels central mounting structure 145. The mountingstructure 145 may include, or be coupled to, avertical shaft 2110 for coupling to the chassis of a vehicle. Theshaft 2110 may allow rotation of the twowheels shaft 2110. -
FIGS. 22A-22C illustrate example rotations of thewheels FIG. 22A shows that the rotary devices may create propulsion for the vehicle by causing bothwheels FIG. 22B shows that the rotary devices may cause the two wheels to turn with respect to the vehicle by rotating thewheels FIG. 22C shows that the rotary devices may cause the two wheels to turn with respect to the vehicle by rotating thewheels -
FIGS. 23A and 23B illustrate example vertical movement of thewheels FIG. 23A shows that one of the devices may cause itsrespective wheel 2105 b move in a vertical direction off of the ground. Thewheel 2105 b may also be rapidly shook in the vertical direction to remove liquid from the surface of the wheel 1205 b. Additionally, bothwheels wheels FIG. 23B shows that theshaft 2110 may be coupled to the chassis of the vehicle so as to allow for angular movement of theshaft 2110 relative to the chassis by, for example, using apivot 2305 or similar component to couple theshaft 2110 with the chassis. In this configuration, different vertical movements of the twowheels wheels wheel 2105 a may move downward and theother wheel 2105 b may move upward, causing thewheels mount 145 andshaft 2110 to tilt. Alternatively, a pivot, or similar component, may be used to couple theshaft 2110 with themount 145, causing thewheels mount 145 to tilt, but not theshaft 2110. -
FIGS. 24A-24F illustrate a top view of avehicle 2405 having four pairs of rotary devices with respective pairs of wheels 2410 a-d.FIG. 24A shows thevehicle 2405 with four pairs of rotary devices and respective wheels 2410 a-d, one pair at each corner of thevehicle 2405. The vehicle may also be configured with different wheel arrangements, such as two pairs of rotary devices and respective wheels at the front corners of the vehicle. In such an arrangement, the wheels at the rear corners of the vehicle may be conventional vehicle wheels. As shown inFIG. 24A , all of the wheel pairs 2410 a-d may be oriented in the forward direction to provide forward propulsion for the vehicle.FIG. 24B shows that the two front pairs ofwheels vehicle 2405 to turn to the right.FIG. 24C shows that the rear pairs ofwheels vehicle 2405.FIG. 24D shows that each of the wheel pairs 2410 a-d may be oriented in a direction that is tangential to a circular path to cause thevehicle 2405 to rotate about its center.FIG. 24E shows that each of the wheel pairs 2410 a-d may be oriented in the same direction, other than the forward direction, to cause thevehicle 2405 to move, for example, diagonally or sideways.FIG. 24F shows that each of the wheel pairs 2410 a-d may be pointed toward, or away from, the center of the vehicle to prevent any movement of the vehicle, obviating the need for a parking brake. The independent movements of each wheel may be controlled by a respective electrical unit 410 (FIG. 4B ) and all movements may be coordinated by a central controller 430 (FIG. 4B ) in communication with the electrical units. - While this invention has been particularly shown and described with references to example embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention encompassed by the appended claims. For example, in addition to being used in a motor vehicle, the disclosed devices may also be used in trains, planes, robots, and force-reflecting human interfaces.
Claims (10)
Priority Applications (1)
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US15/913,531 US20180226188A1 (en) | 2009-11-09 | 2018-03-06 | Electric Rotary Motor with Two Degrees of Movement |
Applications Claiming Priority (3)
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US12/590,493 US8624699B2 (en) | 2009-11-09 | 2009-11-09 | Electric coil and method of manufacture |
US14/144,929 US9934904B2 (en) | 2009-11-09 | 2013-12-31 | Method and manufacturing an electric coil assembly |
US15/913,531 US20180226188A1 (en) | 2009-11-09 | 2018-03-06 | Electric Rotary Motor with Two Degrees of Movement |
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US14/144,929 Continuation US9934904B2 (en) | 2009-11-09 | 2013-12-31 | Method and manufacturing an electric coil assembly |
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US20180226188A1 true US20180226188A1 (en) | 2018-08-09 |
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US12/590,493 Active 2031-09-15 US8624699B2 (en) | 2009-11-09 | 2009-11-09 | Electric coil and method of manufacture |
US14/144,929 Active 2029-12-09 US9934904B2 (en) | 2009-11-09 | 2013-12-31 | Method and manufacturing an electric coil assembly |
US15/913,531 Abandoned US20180226188A1 (en) | 2009-11-09 | 2018-03-06 | Electric Rotary Motor with Two Degrees of Movement |
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US12/590,493 Active 2031-09-15 US8624699B2 (en) | 2009-11-09 | 2009-11-09 | Electric coil and method of manufacture |
US14/144,929 Active 2029-12-09 US9934904B2 (en) | 2009-11-09 | 2013-12-31 | Method and manufacturing an electric coil assembly |
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US (3) | US8624699B2 (en) |
EP (1) | EP2494683A1 (en) |
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Also Published As
Publication number | Publication date |
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US8624699B2 (en) | 2014-01-07 |
EP2494683A1 (en) | 2012-09-05 |
WO2011057052A1 (en) | 2011-05-12 |
US20110109413A1 (en) | 2011-05-12 |
US20140109395A1 (en) | 2014-04-24 |
US9934904B2 (en) | 2018-04-03 |
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