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Title: A resonant power converter for DC magnet power supply applications
Author: Pholboon, Seksak
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2012
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Magnet Power Supplies (MPSs) for high current magnet loads are extensively used in high energy physics applications such as partical-beam excitation and control for particle accelerator systems. The requirements for MPSs include very low output waveform ripple and demanding transient performance. In addition, low volume and high efficiency are also a benefit in many applications. The purpose of this project was to investigate the suitable converter topology for a DC magnet load using the example power converter specification used to power the Diamond Light Source Storage Ring Quadrupole Magnets. The proposed converter was based on soft-switching resonant converter technology. The input stage consisted of a three phase diode rectifier with a DC link capacitor connected on the grid. The output stage was composed of a synchronous current doubler rectifier (SCDR) linked to the input stage using a series resonant parallel loaded (SRPL) inverter with a high frequency step down transformer. The dynamic model of the converter suitable for control design was based on a DQ approach. The power losses analysis was also presented to predict the converter efficiency. The converter was simulated using a MATLAB simulink in conjunction with PLECS. The design and construction of the converter including the magnet load emulator were presented in detail. Simulation and experimental results verify the feasibility of the proposed converter topology and the modelling method. Finally, the experimental converter power losses compared to the simulated losses estimation confirm the reliability of the power losses principle.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available