00000ctm a22000004i 4500 UP-99796217612279973 Buklod 20230215105418.0 m |o d | ta 161102s xx d r |||| u| (iLib)UPD-00259710966 DENGII rda eng DMLUC LG 996 2016 E643 O38 Odulio, Carl Michael F. author. A multi mode LLC resonant converter for EDM applications by Carl Michael F. Odulio ; Allan C. Nerves, adviser. Quezon City College of Engineering, University of the Philippines Diliman 2016. x, 108 leaves color illustrations 28 cm text rdacontent unmediated rdamedia volume rdacarrier Thesis (Ph.D. Electrical and Electronics Engineering)--University of the Philippines Diliman July 2016. Available to the general public. Electrical discharge machining (EDM) uses controlled electric sparks to erode the metal in a workpiece, and this method is now a well established machining process for high power applications. EDM power supplies utilizing different topologies for high power applications have been examined. Through the years, EDM converters have continuously evolved to improve the overall performance. This study investigates the utilization of the LLC topology for use in EDM systems. In the development of this modified converter, the combined method of magnitude and frequency control is investigated for use in resonant converters in EDM applications. This control method can be used by the LLC topology in improving the operating converter efficiency with zero voltage and zero current switching transitions. The operating frequency range is also decreased which leads to better magnetic components design. The use of the LLC topology shows that it is capable of delivering the requirements of the EDM load. This can be achieved by utilizing the LLC converter with modifications on the control and power stage design in order to generate the correct voltage and current waveforms for an EDM system. The converter utilizes two regions of operation in order to generate the required voltages for both striking and arcing voltages. The design also incorporates the operating voltage of the resonant capacitor in the specifications in order to protect the resonant capacitor from overvoltage at different loading conditions. Results from simulation and experimental setups show performance improvements of the proposed converter in terms of increased operating efficiency, reduction in components count and resonant capacitor voltage control. Electric metal-cutting. Electric current converters. Nerves, Allan C. adviser. Thesis FI UP UPD DARCHIVES LG 996 2016 E643 O38 UPD DENG-II LG 996 2016 E643 O38 Thesis