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Publisher DOI: 10.18416/ijmpi.2022.2203076
Title: Multi-channel current control system for coupled multi-coil arrays
Language: English
Authors: Förger, Fynn  
Scheel, Jan-Philipp 
Thieben, Florian  
Mohn, Fabian  
Knopp, Tobias 
Gräser, Matthias  
Issue Date: 21-Mar-2022
Publisher: Infinite Science Publishing
Source: International Journal on Magnetic Particle Imaging 8 (1, Suppl 1): 2203076 (2022)
Abstract (english): 
For imaging and magnetic manipulation experiments in Magnetic Particle Imaging several field generating coils are required to produce sufficiently high and flexible magnetic fields. To minimize the power consumption, coils with iron cores are the best choice for low and medium frequency ranges. Such coils have comparatively high reactance and are often inductively coupled. The trivial approach to ensure target currents is to provide each coil with a current controlled source resulting in high system complexity and high costs. This paper presents a circuit design to distribute bipolar target currents from a single unipolar source with high accuracy, reducing unwanted coil coupling by a feedback controller. Thus, the number of current sources can be significantly reduced. With a regenerative concept, reactive power is stored and can be reused, allowing efficient and fast current switching.
DOI: 10.15480/882.4406
ISSN: 2365-9033
Journal: International journal on magnetic particle imaging 
Institute: Biomedizinische Bildgebung E-5 
Document Type: Article
Project: Modellbasierte Parameteridentifikation in Magnetic Particle Imaging 
Funded by: Bundesministerium für Bildung und Forschung (BMBF) 
More Funding information: Research funding: The authors thankfully acknowledge the financial support by the German Research Foundation (DFG, grant number KN 1108/7-1 and GR 5287/2-1).
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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