Title :
Control of a power supply with cycling current using different controllers
Author :
Roque, Antonio ; Maia, J. ; Margato, E. ; Sousa, Duarte M. ; Marques, Gil
Author_Institution :
Dept. of Electr. Eng., ESTSetubal - Inst. Politec. de Setubal & INESC-ID, Setubal, Portugal
Abstract :
Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometers require controlled current sources in order to get accurate flux density with respect to its magnet. The main elements of the proposed solution are a power semiconductor, a DC voltage source and the magnet. The power semiconductor is commanded in order to get a linear control of the flux density. To implement the flux density control, a Hall Effect sensor is used. Furthermore, the dynamic behavior of the current source is analyzed and compared when using a PI controller and a PD2I controller.
Keywords :
Hall effect devices; PD control; PI control; electric current control; magnetic flux; magnets; nuclear magnetic resonance; power semiconductor devices; power supply circuits; DC voltage source; FFC; Hall effect sensor; NMR relaxometer; PD2I controller; PI controller; cycling current; fast field cycling; magnet flux density linear control; nuclear magnetic resonance relaxometer; power semiconductor; power supply control; Magnetic flux; Magnetic semiconductors; Nuclear magnetic resonance; PD control; Power supplies; Steady-state; Transfer functions; Fast Field Cycling NMR; control; current; flux density; power supply; relaxometer;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM), 2014 International Symposium on
Conference_Location :
Ischia
DOI :
10.1109/SPEEDAM.2014.6872066
