Design and Implementation of DC Pulsed Power Supply Employing Self-Excited Induction Generators and Flywheels for Toroidal Field Coils of a Tokamak Device, PLATO

Masamichi Murayama, Shuhei Kato, Akihide Fujisawa, Keisuke Matsuoka, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada

Research output: Contribution to journalArticle

Abstract

Tokamak devices with non-superconducting coils must be equipped with pulsed power supplies employing energy storage system when the devices cannot receive electricity from power grids directly. Flywheel energy storage system (FESS) for the coil power supplies have been used only in large or middle-sized tokamak devices since they employed synchronous motor generators (SMGs), which have difficulty in downsizing and maintenance. In our previous research, FESS with induction motor generators (IMGs) utilizing self-excited phenomena was developed. In this paper, using two novel concepts of multiple IMGs and installing a multistage converter, both of design flexibility and coil current ripple reductions are realized. As an experimental result, a peak load power of 778 kW and an electric energy supply of 408 kJ to the dummy coil were achieved using a toroidal field coil power supply (TFCPS) of a tokamak device, PLATO.

Original languageEnglish
Article number9042294
JournalIEEE Transactions on Applied Superconductivity
Volume30
Issue number4
DOIs
Publication statusPublished - Jun 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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