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Development of –1 MV DC Filter and High‐Voltage DC Measurement Systems for ITER NBI
Author(s) -
TAKAHASHI AKESHI,
TANAKA TOSHIAKI,
FUJITA HIROYUKI,
HIRANUMA YUKI,
ICHIMURA SATOSHI,
WATANABE KAZUHIRO,
KASHIWAGI MIEKO,
MAEJIMA TETSUYA
Publication year - 2018
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23101
Subject(s) - responsivity , voltage , thermonuclear fusion , materials science , dc bias , electrical engineering , filter (signal processing) , voltage divider , optoelectronics , physics , engineering , plasma , quantum mechanics , photodetector
SUMMARY This paper presents the development results of a −1 MV dc filter and dc measurement systems for an ITER (International Thermonuclear Experimental Reactor) neutral beam injector (NBI) system. High accuracy of 0.5% and fast responsivity of 3.3 μs, −3 dB are required for the dc measurement systems: both dc voltage dividers and DCCTs. Circuit design and thermal flow design were carried out to clarify and minimize their effects on the accuracy and responsivity. The validity of the established design was demonstrated by the actual‐product tests; temperature rise of each components fell below the allowable value; inner components of dc filter withstood dc −1.2 MV; each voltage divider accurately measured the voltage during the dc −1.2 MV withstand voltage test; the voltage dividers and the DCCTs were adequate to the requirements of responsivity (3.3 μs, −3 dB).