A low fluctuation control strategy for PMSM direct drive system targeting Particle Beam Instrumentation Application

Emery, Jonathan (European Organization for Nuclear Research (CERN), Beam instrumentation group, Geneva, Switzerland) ; Andersson, Patrik (European Organization for Nuclear Research (CERN), Beam instrumentation group, Geneva, Switzerland) ; Roncarolo, Frederico (European Organization for Nuclear Research (CERN), Beam instrumentation group, Geneva, Switzerland) ; Thoma, Yann (School of Management and Engineering Vaud, HES-SO // University of Applied Sciences Western Switzerland)

Particle accelerators have a singular environment where multiple constraints are driving the engineering of equipment. Designers have to deal with the destructive effects of charged particles, high vacuum requirements, large temperatures and particular system architectures due to large-scale installations such as the Large Hadron Collider (LHC) at the CERN laboratory. At the same time, there is a continuous challenge to produce, measure and control smaller particle beams to increase the discovery potentials of large physics experiments. In this context, an innovative actuator has been built to measure precisely the size of beams down to 150µm sigma, by moving a thin carbon wire of 30µm at about 20m·s −1 through particle beams. Called Beam Wire Scanner (BWS), this system uses direct drive coupling to actuate a shaft inside a vacuum vessel without moving parts outside it. We are reporting on the design and validation of its control system based on torque control feedback as the only on-line closedloop system to operate this instrument. The proposed strategy keeps the smoothest action as possible on the system avoiding speed and position corrections that would lead to undesired torque variations, increasing the uncertainty of the carbon wire position.


Keywords:
Conference Type:
full paper
Faculty:
Ingénierie et Architecture
School:
HEIG-VD
Institute:
ReDS - Reconfigurable & embedded Digital Systems
Publisher:
Hong Kong, China, 19-21 August 2019
Date:
2019-08
Hong Kong, China
19-21 August 2019
Pagination:
7 p.
Published in:
Proceedings of 2019 IEEE Conference on Control Technology and Applications (CCTA), 19-21 August 2019, Hong Kong, China
DOI:
ISBN:
978-1-7281-2767-5
Appears in Collection:



 Record created 2020-03-25, last modified 2020-03-26

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