Two-sided linear induction motor especially for suspended vehicles

Claim 2

A double-sided linear induction motor, comprising a movable central stator having a core and coil means on said core, said stator having a pair of opposite active faces extending along the direction of displacement thereof; and a stationary reaction member extending in the direction of movement of said stator, said member being composed of ferromagnetic material and being of U-profile with opposite parallel shanks of the U flanking said stator and each spacedly juxtaposed with a respective one of said active faces; said shanks each being provided with a reaction layer of material of high conductivity along its surface confronting the respective active face, said core and said coil means being constructed and arranged to produce a traveling magnetic field along said member for displacing said stator in said direction with a substantial part of the flux return path between magnetic flux entry into and return from said shanks being around the bight of the U, said U-profile member constituting a rail of a magnetic-suspension vehicle track, at least one shank of the U being formed with a pair of projecting flanges defining armature poles cooperating with an electromagnet.

Claim 3

The double-sided linear induction motor defined in claim 1 wherein said stator comprises a row of rectangular parallelopipedal packs of sheet-iron lamellae and nonmagnetic spacers securing said packs together to form a core, said packs projecting beyond said spacers to define grooves receiving said coil means.

Claim 4

A magnetic-suspension vehicle system, comprising a track; a pair of double-sided linear induction motors cooperating with said track, each of said motors comprising a movable central stator having a core and coil means on said core, said stator having a pair of opposite active faces extending along the direction of displacement thereof; and a stationary reaction member extending in the direction of movement of said stator, said member being composed of ferromagnetic material and being of U-profile with opposite parallel shanks of the U flanking said stator and each spacedly juxtaposed with a respective one of said active faces, said shanks each being provided with a reaction layer of material of high conductivity along its surface confronting the respective active face, said core and said coil means being constructed and arranged to produce a traveling magnetic field along said member for displacing said stator in said direction with a substantial part of the flux return path between magnetic flux entry into and return from said shanks being around the bight of the U, a horizontally open ferromagnetic rail forming the respective reaction member; a vehicle displaceable along said track in said direction and carrying the stators of said motors, each of said ferromagnetic rails being formed as an armature; and suspension and guide electromagnets mounted on said vehicle and spacedly juxtaposed with the respective armatures for supporting and guiding said vehicle along said track.

Claim 5

A magnetic-suspension vehicle system, comprising a track; a pair of double-sided linear induction motors cooperating with said track, each of said motors comprising a movable central stator having a core and coil means on said core, said stator having a pair of opposite active faces extending along the direction of displacement thereof; and a stationary reaction member extending in the direction of movement of said stator, said member being composed of ferromagnetic material and being of U-profile with opposite parallel shanks of the U flanking said stator and each spacedly juxtaposed with a respective one of said active faces, said shanks each being provided with a reaction layer of material of high conductivity along its surface confronting the respective active face, said core and said coil means being constructed and arranged to produce a traveling magnetic field along said member for displacing said stator in said direction with a substantial part of the flux return path between magnetic flux entry into and return from said shanks being around the bight of the U, a horizontally open ferromagnetic rail forming the respective reaction member; a vehicle displaceable along said track in said direction and carrying the stators of said motors, each of said ferromagnetic rails being formed as an armature; and suspension and guide electromagnets mounted on said vehicle and spacedly juxtaposed with the respective armatures for supporting and guiding said vehicle along said track.

Claim 6

A magnetic-suspension vehicle system, comprising a track; a horizontally open ferromagnetic rail forming the respective reaction member; a vehicle displaceable along said track in said direction and carrying the stators of said motors, each of said ferromagnetic rails being formed as an armature; and suspension and guide electromagnets mounted on said vehicle and spacedly juxtaposed with the respective armatures for supporting and guiding said vehicle along said track, each of said armatures being formed with a pair of transversely spaced poles projecting from a shank of the respective rail and formed unitarily therewith, said electromagnets being mounted on said vehicle in respective transversely spaced rows and having electromagnet cores cooperating with said poles of the respective armature.

Claim 7

A magnetic-suspension vehicle system, comprising a track; a horizontally open ferromagnetic rail forming the respective reaction member; a vehicle displaceable along said track in said direction and carrying the stators of said motors, each of said ferromagnetic rails being formed as an armature; and suspension and guide electromagnets mounted on said vehicle and spacedly juxtaposed with the respective armatures for supporting and guiding said vehicle along said track, each of said armatures being formed with a pair of transversely spaced poles projecting from a shank of the respective rail and formed unitarily therewith, said electromagnets being mounted on said vehicle in respective transversely spaced rows and having electromagnet cores cooperating with said poles of the respective armature.

Claim 8

The system defined in claim 4 wherein electromagnets of each row have their cores laterally offset to one side and the opposite side relative to said poles so as to generate magnetic fields with horizontal guidance components and vertical suspension components.

Claim 9

A double-sided linear induction motor, comprising a movable central stator having a core and coil means on said core, said stator having a pair of opposite active faces extending along the direction of displacement thereof; and a stationary reaction member extending in the direction of movement of said stator, said member being composed of ferromagnetic material and being of U-profile with opposite parallel shanks of the U flanking said stator and each spacedly juxtaposed with a respective one of said active faces, said shanks each being provided with a reaction layer of material of high conductivity along its surface confronting the respective active face, said core and said coil means being constructed and arranged to produce a traveling magnetic field along said member for displacing said stator in said direction with a substantial part of the flux return path between magnetic flux entry into and return from said shanks being around the bight of the U, said stator comprising a row of rectangular parallelopipedal packs of sheet-iron lamellae and nonmagnetic spacers securing said packs together to form a core, said packs projecting beyong said spacers to define grooves receiving said coil means, said member being horizontally open and said stator being wholly received between said shanks, said coil means including first and second coils surrounding the respective one of said packs with turns in planes paralleL to the respective shanks and energized in phase to induce a magnetic flux primarily in a plane perpeniduclar to said member.

Claim 10

A double-sided linear induction motor, comprising a movable central stator having a core and coil means on said core, said stator having a pair of opposite active faces extending along the direction of displacement thereof; and a stationary reaction member extending in the direction of movement of said stator, said member being composed of ferromagnetic material and being of U-profile with opposite parallel shanks of the U flanking said stator and each spacedly juxtaposed with a respective one of said active faces, said shanks each being provided with a reaction layer of material of high conductivity along its surface confronting the respective active face, said core and said coil means being constructed and arranged to produce a traveling magnetic field along said member for displacing said stator in said direction with a substantial part of the flux return path between magnetic flux entry into and return from said shanks being around the bight of the U, said stator comprising a row of rectangular parallelopipedal packs of sheet-iron lamellae and nonmagnetic spacers securing said packs together to form a core, said packs projecting beyong said spacers to define grooves receiving said coil means, said member being horizontally open and said stator being wholly received between said shanks, said coil means including first and second coils surrounding the respective one of said packs with turns in planes paralleL to the respective shanks and energized in phase to induce a magnetic flux primarily in a plane perpeniduclar to said member.

Claim 11

The double-sided linear induction motor defined in claim 6 wherein the lamellae of said packs lie in planes perpendicular to said direction and to said surfaces of said shanks.