量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum and Radiological Science and Technology.
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Next-generation synchrotron radiation sources, such as SPring-8 upgrade, require various kinds and large amounts of magnet power supplies, and most of them are require to be highly stable. In order to provide many power supplies with a reasonably low cost in a short production period, we developed a common current control system using a digital feedback control technology. The system consists of a high-precision analog-digital converter (ADC) circuit and a feedback controller using a field programmable gate array (FPGA). We tested a DC power supply equipped with the above digital feedback control system, and confirmed that the current ripple could be suppressed to less than 5 ppm (pk-pk). We also prototyped a high power DC power supply with 650 A based on a modularization concept. We also prototyped a DC-link power supply for a steering magnet with synchronized current output between 3 ports.
会議概要（会議名, 開催地, 会期, 主催者等）
10th International Particle Accelerator Conference
Digital Control System Of High Precision Magnet Power Supply For SPring-8-Ⅱ
