Tubular electrical machines

Details Tubular electrical machines Tubular electrical machines

H - Electricity

02

K

H02K 33/00 (2006.01) H02K 9/00 (2006.01) H02K 55/00 (2006.01)

Patent

CA 2574153

The current invention provides an improved synchronous tubular electrical machine comprised of a radially outer member 2 that has a substantially cylindrical inner surface, a radially inner member 5 that is substantially cylindrical and is coaxially disposed within the outer member 2 such that it may move reciprocally relative to the outer member 2 in the axial direction. A plurality of axially spaced circumferential armature coils 1 are electrically insulated from one another and are formed as part of one of the outer member 2 and the inner member 5. A plurality of axially spaced circumferential superconducting coils 4 are formed as part of the other of the outer member 2 and the inner member 5. During operation of the tubular machine, each superconducting coil 4 is maintained in a superconducting state and an electrical current is supplied to each superconducting coil 4 in such a manner that the current flowing around each coil is in the opposite direction to the current flowing around the coils adjacent to it. Tubular machines according to the present invention may be significantly more efficient, have higher peak-mean power ratios and be much smaller than current permanent magnet based synchronous tubular electrical machines.

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