Title :
Numeric calculation of current distribution in the damper cylinder of a large superconducting generator
Author_Institution :
Inst. for Electromagnetic Energy Conversion, Tech. Univ. Graz, Austria
fDate :
1/1/1988 12:00:00 AM
Abstract :
The calculation of the subtransient reactance, winding forces, and surface losses in large superconducting turbogenerators with an air-gap stator winding must start from the three-dimensional magnetic stator winding field. A calculation method for the damper current distribution is presented that approximates the damper cylinder by a grid of short-circuited loops with an infinite conductivity. The magnetic field of the stator winding and the field of the damper cylinder are calculated by the Biot-Savart law. The loop currents are calculated by iteration. As a sample result, damper current distribution plots are shown for a generator with a special type of high-voltage stator winding called the coaxial turn winding
Keywords :
current distribution; electromagnetism; magnetic fields; rotors; stators; superconducting machines; turbogenerators; Biot-Savart law; air-gap stator winding; coaxial turn winding; damper current distribution; damper cylinder; infinite conductivity; magnetic field; short-circuited loops; subtransient reactance; superconducting generator; surface losses; three-dimensional magnetic stator winding field; turbogenerators; winding forces; Air gaps; Conductivity; Current distribution; Damping; Magnetic fields; Shock absorbers; Stator windings; Superconducting magnets; Superconducting transmission lines; Turbogenerators;
Journal_Title :
Magnetics, IEEE Transactions on