Electrical machinery incorporating double helix coil designs...

Electrical generator or motor structure – Dynamoelectric – Rotary

Reexamination Certificate

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Details

C310S198000, C310S184000, C310S268000, C310S179000, C310S180000, C290S055000

Reexamination Certificate

active

08040012

ABSTRACT:
An alternating current machine which generates a magnetic field or induces a voltage. In one embodiment the machine includes a stator and a rotor positioned about an axis. The stator includes three sets of coils, each set including at least a first pair of coil rows wired in series, with first and second members of the first pair configured to generate axial fields in opposite directions. Coil rows in the first pair of each set of coils are each arranged a different distance from the axis. A first member of the pair of the second set of coil rows is positioned between the first and second members of the pair of the first set of coil rows. The distance between the axis and the first member of the second pair of coil rows is intermediate the distances between the members of the first pair of coil rows and the axis.

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Ball, MJ et al, Modulated Double Helix Quadrupole Magnets, IEEE Transactions on Applied Superconductivity, IEEE Service Center Los Alamitos CA, US vol. 13, No. 2—Jun. 1, 2003, pp. 1369-1372.
Ball, MJ et al, “The Double Helix dipole—a novel approach to Accelerator Magnet Design” IEEE Transactions on Applied Superconductivity, IEEE Service Center Los Alamitos, CA, US, vol. 13, No. 2—Jun. 1, 2003, pp. 1365-1368.

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