JET Flywheel Generators
- 1 May 1986
- journal article
- research article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part A: Power and Process Engineering
- Vol. 200 (2) , 95-100
- https://doi.org/10.1243/pime_proc_1986_200_013_02
Abstract
Two large vertical shaft flywheel generators each provides the JET (Joint European Torus) device with peak power up to 400 MW and energy up to 2600 MJ per pulse to induce and confine the multi-mega-ampère plasma current. The integrated rotor flywheel consists of a 650 tonne/10 m diameter rim carrying the poles of the machine. The energy is stored kinetically during a 9 min interval of acceleration from half-speed to full-speed and then released during a 20 s long deceleration. A design life of 100 000 cycles at full energy rating was specified. Following a review of the mechanical design and construction of the generators, the paper will concentrate on the assessment of the stresses and fatigue life of the rotor system, its dynamic behaviour (rim movement, critical speed and balancing) and on the performance in operation of the large thrust bearing.Keywords
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