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RIS citation export for TUPMP014: Digital Control System of High Precision Magnet Power Supply for SPring-8-II

AU  - Kondo, C.
AU  - Fukami, K.
AU  - Fukui, T.
AU  - Nakazawa, S.
AU  - Nishimori, N.
AU  - Saji, C.
AU  - Takano, S.
AU  - Tanaka, H.
AU  - Watanabe, T.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Digital Control System of High Precision Magnet Power Supply for SPring-8-II
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - For the SPring-8 upgrade plan, SPring-8-II, a variety of magnet power supplies (PS) from 10 W to larger than 100 kW with a high current stability of about 10 ppm (pk-pk, typ.) are required. In order to develop the PSs within a given time and budget, we plan to use a common control system based on a digital control technology that can be adopted for the variety and the high precision PSs. The system consists of a high-precision analog-digital converter (ADC) circuit and a field programmable gate array (FPGA). Since the precision of the ADC circuit determines the current stability of the PS, we first developed the ADC circuit of high accuracy of less than 10 ppm (pk-pk). A proportional-integral (PI) control logic and a digital pulse width modulation (PWM) function was implemented in the FPGA firmware. These functions can be easily modified for each power supply by a desktop computer. We prototyped a DC power supply equipped with the newly developed digital feedback control system and confirmed that the current fluctuation was suppressed to less than 10 ppm (pk-pk). In the presentation, we will report the current status and future perspective of our power supply development including the evaluation results of the new circuits and the power supply we have developed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1259
EP  - 1262
KW  - controls
KW  - feedback
KW  - power-supply
KW  - synchrotron-radiation
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-TUPMP014
UR  - http://jacow.org/ipac2019/papers/tupmp014.pdf
ER  -