Sökning: "DC-DC Converters"
Visar resultat 11 - 15 av 33 avhandlingar innehållade orden DC-DC Converters.
11. Design and Optimization of HF Transformers for High Power DC-DC Applications
Sammanfattning : Increasing the operational frequency is the most common solution to achieve higherpower densities, since the weight and volume of the magnetic part, the bulkiestelement in power electronics converters, are then decreased. This solution is wellestablished in low power high frequency applications, while in the recent decade,the possibility of utilizing high frequency at higher power and voltage levels hasgenerated wide interest as well. LÄS MER
12. Efficient Energy Harvesting Interface for Implantable Biosensors
Sammanfattning : Energy harvesting is identified as a promising alternative solution for powering implantable biosensors. It can completely replace the batteries, which are introducing many limitations, and it enables the development of self-powered implantable biosensors. LÄS MER
13. Configuration study of large wind parks
Sammanfattning : In this thesis, layouts of various large-scale wind parks, using both AC as well as DC, are investigated. Loss modelling of the wind park components as well as calculations of the energy capture of the turbines using various electrical systems are performed, and the energy production cost of the various park configurations is determined. LÄS MER
14. Grid Connected Three-Level Converters : Studies for Wave Energy Conversion
Sammanfattning : This thesis presents an electrical system analysis of a wave energy converter (WEC) for the objective of grid connection. To transfer the enormous amount of power from waves to the load centers, efficient power electronic systems are essential. LÄS MER
15. Design and control of a DC collection grid for a wind farm
Sammanfattning : In this thesis, the internal DC collection grid for a wind farm is investigated regarding the design, losses and dynamic operation for both normal operating conditions and for different fault conditions. The main advantage for the DC collection grid is the considerably lower weight of the 1 kHz transformers in the DC/DC converters compared to the equivalent 50 Hz transformers. LÄS MER