DocumentCode
860417
Title
Improved Dynamic Filters for the Main Ring Magnet Power Supply of the KEK 12 GeV PS
Author
Baba, H. ; Sato, H. ; Matsumoto, S. ; Kubo, T. ; Kitagawa, K. ; Asaji, K. ; Kabe, A.
Author_Institution
National Laboratory for High Energy Physics Oho-machi, Tsukuba-gun, Ibaraki-ken, 305, Japan
Volume
28
Issue
3
fYear
1981
fDate
6/1/1981 12:00:00 AM
Firstpage
3068
Lastpage
3070
Abstract
The dynamic filters of the KEK 12 GeV PS were improved in the voltage ripple detector, in the control system and in the power-up of the PWM and B-class amplifiers. Especially, a use of new developed voltage ripple detector was able to change from the former feed forward system to the feed back control system. As the results, the low frequency ripple voltage across the magnet coil (< 300 Hz) could be reduced to less than -26 db to the inputs in the B, QF and QD magnet power supply and the current ripple is considered to be about 8 × 10-6 at flat top current 2,850 A during extraction.
Keywords
Control systems; Detectors; Feeds; Filters; Frequency; Magnetic separation; Power amplifiers; Power supplies; Pulse width modulation; Voltage control;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1981.4332010
Filename
4332010
Link To Document