低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
53 巻 , 3 号
選択された号の論文の8件中1~8を表示しています
巻頭言
特集:超電導マグネット技術を支える電源システム(1)
基礎講座
  • 野村 新一
    2018 年 53 巻 3 号 p. 115-121
    発行日: 2018/05/20
    公開日: 2018/07/14
    ジャーナル フリー

    This article summarizes the basics of power supply systems for magnets, especially the basic theory of AC/DC power converter systems for superconducting magnets. In order to control both excitation and demagnetization of the magnet, the power converter requires alternative DC voltage control capability. Since the current path from the converter system to the magnet is constant, the switching device requires reverse blocking capability to withstand reverse voltage. Thyristor converters are widely used as power converter systems for fusion magnets and accelerator magnets. The thyristor converter enables both excitation and demagnetization of the magnet by controlling the firing angle. The voltage source converter becomes a feasible option for magnet power supply systems. However, since the direction of DC voltage is constant, the power supply system requires a DC chopper in order to control the applied voltage of the magnet in both directions. The power flow between the threephase AC system and a voltage source converter is fundamentally determined by the voltage phase difference between the AC system and the converter.

テーマ解説
研究/事業グループ紹介
feedback
Top