Control Characteristics of DC Generator-motors with Flywheels for Toroidal Field Coil Power Source

摘要

In this paper, the control system which has been proposed to upgrade the toroidal field coil (TFC) power source at JFT-2M tokamak machine in Japan Atomic Energy Research Institute is presented. This power source, us- ing four dc generator-motors with flywheel (DCG) for storing 210MJ of the energy, can produce 51.3MW (2.7kV, 19kV) of the flat top over 1 sec. The control characteristics of the DCG operating as generator are de- scribed, especially emphasized such features as the unique method for opening the contactor of a main-circuit- switch by controlling the field current of DCG.