TRANSPORT SYSTEM POWERED BY SHORT BLOCK LINEAR SYNCHRONOUS MOTORS

• US 20100186618A1
• Filed: 01/23/2009
• Published: 07/29/2010
• Est. Priority Date: 01/23/2009
• Status: Active Grant

• Current Assignee: Rockwell Automation, Inc.
• Original Assignee: Magnemotion Incorporated (Rockwell Automation, Inc.)
• Inventors: Perreault, Brian M., Clark, Tracy M., Thornton, Richard D., Young, Jason, King, Nathanael N., Bottasso, Michael W.
• Granted Patent: US 8,616,134 B2
• Time in Patent Office: Days
• US Class Current: 104/281
• CPC Class Codes: B60L 13/003 Crossings; Points
• CPC Class Codes: B60L 13/03 Electric propulsion by linear motors
• CPC Class Codes: B60L 13/10 Combination of electric propulsion and magnetic suspension or levitation
• CPC Class Codes: B60L 2200/26 Rail vehicles
• CPC Class Codes: B65G 19/02 for articles, e.g. for containers
• CPC Class Codes: B65G 35/06 comprising a load-carrier moving along a path, e.g. a closed path, and adapted to be engaged by any one of a series of traction elements spaced along the path effecting drive at two or more points spaced along the length of an endless conveyor B65G23/32
• CPC Class Codes: B65G 54/02 electrostatic, electric, or magnetic
• CPC Class Codes: H02K 41/031 of the permanent magnet type

Abstract

Aspects of the invention provide a transport system powered by short block Linear Synchronous Motors (LSMs). The use of short blocks allows vehicles to move under precise control even when they are in close proximity to each other. The design allows the vehicles to be propelled and guided while negotiating sharp turns and negotiating merge and diverge switches. A coreless LSM can be used to create propulsive force without attractive force so as to allow a relatively high drag vehicle suspension, such as a vehicle sliding on a smooth surface.

Claims

1. A transport system, comprising:

A. a guideway including a plurality of coreless propulsion coils disposed along a region in which one or more vehicles are to be propelled,

B. one or more vehicles disposed on the guideway, each containing a magnetic flux source,

C. electronic power and control circuitry that excites the propulsion coils independently so as to propel the one or more vehicles along the guideway.

2. The transport system of claim 1, wherein one or more of the vehicles are slidingly disposed on the guideway.

3. The transport system of claim 1, comprising guidance structure on any of the guideway and the one or more vehicles that inhibit the one or more vehicles from moving off the guideway.

4. The transport system of claim 3, wherein the guidance structure comprises one or more rails that are disposed on the guideway.

5. The transport system of claim 1, wherein the magnet flux source of at least one of the vehicles comprises one or more magnets.

6. The transport system of claim 5, wherein the plurality of coils are disposed in the guideway for close proximity to the one or more magnets of passing vehicles.

7. The transport system of claim 5 wherein the one or more magnets comprise a Halbach magnet array.

8. The transport system of claim 1, wherein the propulsion coils are mounted on one or more printed circuit boards.

9. The transport system of claim 1, wherein the guideway comprises a plurality of coupled modules.

10. The transport system of claim 8, wherein one or more of the modules include one or more of the printed circuit boards with propulsion coils mounted thereon.

11. The transport system of claim 10, wherein one or more of the modules comprise one or more power controllers that form part of the electronic power and control circuitry and that are selectively electrically coupled to one or more of the propulsion coils.

12. The transport system of claim 11, wherein the one or more power controllers are selectively electrically coupled to the propulsion coils of the associated module for independent control thereof.

13. The transport system of claim 12, wherein one or more of the modules comprise one or more microprocessors and one or more switches that provide electrical coupling between the power control circuitry and the propulsion coils.

14. The transport system of claim 1 comprising one or more position sensors that monitor the position of vehicles moving on the guideway.

15. A transport system, comprising

A. a guideway comprising a plurality of propulsion coils,

B. one or more vehicles disposed on the guideway, each of the one or more vehicles containing a magnetic flux source,

C. control circuitry that excites the propulsion coils so as to propel the one or more vehicles along the guideway,

D. wherein one or more of the propulsion coils are mounted on a printed circuit board.

16. The transport system of claim 15, wherein the guideway comprises a plurality of coupled modules.

17. The transport system of claim 15, wherein one or more of the modules include one or more of the printed circuit boards with propulsion coils mounted thereon.

18. The transport system of claim 17, wherein one or more of the modules comprise one or more power controllers that are selectively electrically coupled to the propulsion coils on that module.

19. The transport system of claim 18, wherein the power controller is selectively electrically coupled to the one or more propulsion coils of the associated module for independent control thereof.

20. The transport system of claim 19, wherein one or more of the power controllers each contain a microprocessor.

21. A transport system, comprising

A. a guideway that guides one or more vehicles and that includes at least one of a merge region and a diverge region,

B. one or more vehicles disposed on the guideway, each containing a magnetic flux source,

C. electronic power and control circuitry that excites the propulsion coils so as to propel the one or more vehicles independently of one another along the guideway.

22. The transport system of claim 21, wherein the guideway comprises a straight-away region, along with at least one of a merge region and a diverge region.

23. The transports system of claim 22, wherein any of the merge region and the diverge region include a mechanically actuated switch that alters a course of a vehicle passing thereon.

24. The transport system of claim 22, wherein any of the merge region and the diverge region include a magneticaly actuated switch that alters a course of a vehicle passing thereon.

25. The transport system of claim 21, wherein one or more of the vehicles are slidingly disposed on the guideway.

26. The transport system of claim 25, wherein one or more of the vehicles that are slidably disposed on the guideway have a low coefficient of friction therewith.

27. The transport system of claim 26, wherein the coefficient of friction is less then substantially 0.2.

28. The transport system of claim 21, wherein one or more of the vehicles are disposed for rolling motion on the guideway.

29. The transport system of claim 21, wherein one or more of the vehicles are disposed on wheels for rolling motion on the guideway.

30. The transport system of claim 21, wherein at least one of said merge regions and diverge regions comprises a plurality of coreless propulsion coils disposed along a region in which the course of passing vehicles is altered.

31. The transport system of claim 21, wherein at least one of said merge regions and diverge regions comprises a plurality of coreless propulsion coils disposed along a corner, curve and/or branch defining the merge or diverge, respectively, so as to propel the vehicles therethrough.

32. A transport system comprising

a guideway comprising one or more rails that guide the vehicle;

a vehicle with mechanisms to interact with the guideway rails for guidance and containing one or more magnet arrays that can be used for propulsion;

a multiplicity of coils that are mounted in close proximity to the magnets of passing vehicles and can be excited so as to provide forces on the vehicle magnets;

a means for interconnecting the coils to electronic power control circuitry that includes switching devices and one or more microprocessors;

position sensors that monitor the position of vehicles moving on the guideway;

software for controlling microprocessors that controls the coil currents in response to commands and synchronized to the motion of the vehicles;

and an energy source that provides power for the propulsion of the vehicles.

33. A transport system comprising

a guideway comprising one or more rails that guide the vehicle in at least two dimensions;

a vehicle with mechanisms to interact with the guideway rails for guidance and containing one or more magnet arrays that can be used for propulsion;

a surface on the lower side of the vehicle that slides on a surface on the guideway whereby the combination of surfaces has a low coefficient of friction;

a multiplicity of coils that are mounted in close proximity to the magnets of passing vehicles and can be excited so as to provide forces on the vehicle magnets;

a means for interconnecting the coils to electronic power control circuitry that includes switching devices and one or more microprocessors;

position sensors that monitor the position of vehicles moving on the guideway;

software for controlling microprocessors that controls the coil currents in response to commands and synchronized to the motion of the vehicles;

and an energy source that provides power for the propulsion of the vehicles.

34. A transport system comprising

a guideway comprising one or more rails that guide the vehicle in at least two dimensions;

a vehicle that is approximately 50 mm square with mechanisms to interact with the guideway rails for guidance and containing one or more magnet arrays that can be used for propulsion;

a surface on the lower side of the vehicle that slides on a surface on the guideway whereby the combination of surfaces has a coefficient of friction of less than 0.2;

a multiplicity of coils that are mounted within a few mm of the magnets of passing vehicles and can be excited so as to provide forces on the vehicle magnets with at least three coils able to create a propulsive force on a single vehicle;

a means for interconnecting the coils to electronic power control circuitry that includes switching devices and one or more microprocessors;

position sensors that monitor the position of vehicles moving on the guideway;

software for controlling microprocessors that controls the coil currents in response to commands and synchronized to the motion of the vehicles;

and an energy source that provides power for the propulsion of the vehicles.

35. A guideway module for use in a transport system, the guideway module comprising

A. one or more coreless propulsion coils disposed along a region in which one or more vehicles that include magnetic flux sources are to be propelled,

B. electronic power and control circuitry that excites the one or more propulsion coils independently of one or more other propulsion coils in any of

(a) the guideway module, and

(b) a guideway in which that guideway module is incorporated,

so as to control movement of one or more vehicles passing over the guideway module.

36. The guideway module of claim 35 adapted for sliding motion of the one or more vehicles thereon.

37. The guideway module of claim 35, comprising guidance structure that inhibits motion of vehicles off the guideway.

40. The guideway module of claim 35, wherein the propulsion coils are mounted on one or more printed circuit boards.

41. The guideway module of claim 35, arranged for interlocking coupling with one or more such modules.

44. The guideway module of claim 35 comprising one or more position sensors that monitor the position of vehicles moving thereon.

38. The guideway module of claim 38, wherein the guidance structure comprises one or more rails.

39. The guideway module of claim 38, wherein the one or more propulsion coils are disposed for close proximity to the one or more magnets defining flux sources on the one or more vehicles passing over the module.

42. The guideway module of claim 38, comprising one or more power controllers that form part of the electronic power and control circuitry and that are selectively electrically coupled to one or more of the propulsion coils.

43. The guideway module of claim 42, wherein the one or more power controllers are selectively electrically coupled to the propulsion coils of the associated module for independent control thereof.

45. A guideway module defining any of a merge and a diverge for use in a transport system, the guideway module altering a course of a vehicle passing thereover, comprising

A. one or more coreless propulsion coils disposed along a region in which one or more vehicles that include magnetic flux sources are to be propelled,

B. electronic power and control circuitry that excites the one or more propulsion coils independently of one or more other propulsion coils in any of

(a) the guideway module, and

(b) a guideway in which that guideway module is incorporated,

so as to independently propel one or more vehicles passing over the guideway module.

46. The guideway module of claim 45, comprising a mechanically actuated switch that alters a course of a vehicle passing thereon.

47. The guideway module of claim 45, comprising a magneticaly actuated switch that alters a course of a vehicle passing thereon.

48. The guideway module of claim 45, comprising a plurality of coreless propulsion coils disposed along a region in which the course of passing vehicles is altered.

49. The guideway module of claim 45, comprising a plurality of coreless propulsion coils disposed along a corner, curve and/or branch defining the merge or diverge, respectively, so as to propel the vehicles therethrough.

50. A guideway for use in a transport system, the guideway comprising one or more couplable modules, each including

A. one or more coreless propulsion coils disposed along a region in which one or more vehicles that include magnetic flux sources are to be propelled,

B. electronic power and control circuitry that excites the one or more propulsion coils independently one or more other propulsion coils in any of

(a) the guideway module, and

(b) a guideway in which that guideway module is incorporated,

so as to propel one or more vehicles passing over the guideway module.

51. A vehicle for use in a transport system, comprising a flux source and adapted to be propelled along a guideway comprising

A. one or more coreless propulsion coils disposed along a region in which one or more vehicles that include magnetic flux sources are to be propelled,

B. electronic power and control circuitry that excites the one or more propulsion coils independently of one or more other propulsion coils so as to propel the vehicle.