Investigation and Implementation of a 10 MHz DC/DC Converter For AESA Radar Applications

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dc.contributor.authorHagman, Niklas
dc.contributor.authorGustavsson, Erik
dc.contributor.departmentChalmers tekniska högskola / Institutionen för energi och miljösv
dc.contributor.departmentChalmers University of Technology / Department of Energy and Environmenten
dc.date.accessioned2019-07-03T13:25:13Z
dc.date.available2019-07-03T13:25:13Z
dc.date.issued2014
dc.description.abstractThe field of power electronics is under constant pursuit for devices with higher power density, improved efficiency, spectral purity, and low cost. In this thesis two DC/DC converter topologies converting 50 V to 30 V, with a maximum load of 6 W are implemented in hardware. The two converter topologies implemented are a Buck converter and a ZVS-CV converter. The converters suitability to operate with a switching frequency of 10 MHz is evaluated. The Buck converter showed an overall peak efficiency of 80.8 %, with a switching frequency of 9.8 MHz. The Buck output power stage alone showed a peak efficiency of 87.2 %. The ZVS-CV converter showed an overall peak efficiency of 76.1 % with a switching frequency of 9.0 MHz, and a peak output stage efficiency of 95.2 %. The higher efficiency for the output power stage of the ZVS-CV is a result of successful removal of switching losses in the switching transistor. The lower overall efficiency of the ZVS-CV converter is due to the need of a more complex control and driving circuit. However, it might be possible to improve the efficiency of the driver circuit in the ZVS-CV converter. The output voltage ripple in the Buck converter is approximately 500 mV compared to the 100 mV in the ZVS-CV converter. The ZVS-CV converter is deemed well suited for 10 MHz operation. Future work should include implementation of a voltage regulator, development of a more efficient driver and control circuit, adaptive control of the dead time and an improved output filter to increase voltage quality.
dc.identifier.urihttps://hdl.handle.net/20.500.12380/200124
dc.language.isoeng
dc.setspec.uppsokLifeEarthScience
dc.subjectElkraftteknik
dc.subjectElectric power engineering
dc.titleInvestigation and Implementation of a 10 MHz DC/DC Converter For AESA Radar Applications
dc.type.degreeExamensarbete för masterexamensv
dc.type.degreeMaster Thesisen
dc.type.uppsokH
local.programmeElectric power engineering (MPEPO), MSc
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