Disc-type inductor eddy current machine

Claim 2

In a disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc with substantially flat surfaces in radial planes, a stator structure including two similar sets of pole pieces disposed on radii Angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward the adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said airgaps and said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that corresponding pole pieces of said two sets are significantly misaligned axially, the thickness of said disc being between onesixth and two-thirds of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 3

In a disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc with substantially flat surfaces in radial planes, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward the adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said airgaps and said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that corresponding pole pieces of said two sets are significantly misaligned axially, the thickness of said disc being approximately one-third of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 4

In a disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc with substantially flat surfaces in radial planes, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward the adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said airgaps and said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that corresponding pole pieces of said two sets are significantly misaligned axially, the thickness of said disc being approximately one-third of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 5

A disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc having substantially smooth surfaces of revolution on each side thereof, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole piece on one side of said disc to those on the other side of said disc along paths passing through said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that a significant axial misalignment of corresponding pole pieces of said two sets occurs to cause flux from a pole piece of one of said sets of pole pieces to travel in a circumferential direction through said disc prior to passing through a corresponding pole piece on the other of said sets to increase the torque of said machine at speeds less than the optimum speed for any unit of excitation, the thickness of said disc being between one-sixth and two-thirds of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 6

A disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc having substantially smooth surfaces of revolution on each side thereof, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole piece on one side of said disc to those on the other side of said disc along paths passing through said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that a significant axial misalignment of corresponding pole pieces of said two sets occurs to cause flux from a pole piece of one of said sets of pole pieces to travel in a circumferential direction through said disc prior to passing through a corresponding pole piece on the other of said sets to increase the torque of said machine at speeds less than the optimum speed for any unit of excitation, the thickness of said disc being between one-sixth and two-thirds of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 7

A disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc having substantially smooth surfaces Of revolution on each side thereof, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that a significant axial misalignment of corresponding pole pieces of said two sets occurs to cause flux from a pole piece of one of said sets of pole pieces to travel in a circumferential direction through said disc prior to passing through a corresponding pole piece on the other of said sets to increase the torque of said machine at speeds less than the optimum speed for any unit of excitation, the thickness of said disc being approximately one-third of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 8

A disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc having substantially smooth surfaces Of revolution on each side thereof, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine, one of said sets on each side of said disc, said pole pieces projecting toward adjacent disc surfaces but being spaced axially therefrom by airgaps, and excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish magnetic flux passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said disc, the improvement which comprises displacement of one of said sets of pole pieces angularly with respect to the other of said sets so that a significant axial misalignment of corresponding pole pieces of said two sets occurs to cause flux from a pole piece of one of said sets of pole pieces to travel in a circumferential direction through said disc prior to passing through a corresponding pole piece on the other of said sets to increase the torque of said machine at speeds less than the optimum speed for any unit of excitation, the thickness of said disc being approximately one-third of the width of one of said pole pieces, the width being measured along the circumference of said disc.

Claim 9

A disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc having substantially smooth surfaces of revolution on each side thereof, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine with adjacent pole pieces of each of said sets separated by slots, one of said sets of pole pieces being disposed on each side of said disc, said pole pieces projecting toward adjacent disc surfaces but being spaced axially therefrom by airgaps and the thickness of said disc being between one-sixth and two-thirds of the width of one of said pole pieces measured from slot to slot along the circumference of said disc, excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish a flux path passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said disc, with said pole pieces of one of said sets at least partially aligned with the slots between the pole pieces of the other of said sets on the other side of said disc so that the flux travels in a circumferential direction through said disc as it passes through corresponding pole pieces on either side of said disc.

Claim 10

A disc-type inductor eddy current machine of the type having a rotor in the form of a spinning disc having substantially smooth surfaces of revolution on each side thereof, a stator structure including two similar sets of pole pieces disposed on radii angularly spaced around the axis of rotation of said machine with adjacent pole pieces of each of said sets separated by slots, one of said sets of pole pieces being disposed on each side of said disc, said pole pieces projecting toward adjacent disc surfaces but being spaced axially therefrom by airgaps and the thickness of said disc being between one-sixth and two-thirds of the width of one of said pole pieces measured from slot to slot along the circumference of said disc, excitation means generating a magnetic field which causes all of said pole pieces of one of said sets of pole pieces to be of one magnetic polarity and all of said pole pieces of the other of said sets of pole pieces to be of the opposite magnetic polarity to establish a flux path passing from said pole pieces on one side of said disc to those on the other side of said disc along paths passing through said disc, with said pole pieces of one of said sets at least partially aligned with the slots between the pole pieces of the other of said sets on the other side of said disc so that the flux travels in a circumferential direction through said disc as it passes through corresponding pole pieces on either side of said disc.