Sökning: "DC-link voltage"
Visar resultat 1 - 5 av 39 avhandlingar innehållade orden DC-link voltage.
1. Quasi Resonant DC Link Converters - Analysis and Design for a battery Charger Application
Sammanfattning : Environmental aspects have during the last years made electric vehicles an interesting competitor to the present internal combustion engine driven vehicles. For a broad introduction of pure electric vehicles, a battery charging infrastructure is deemed necessary. However, to build and maintain such an infrastructure is costly. LÄS MER
2. Multilevel Power Converters with Smart Control for Wave Energy Conversion
Sammanfattning : The main focus of this thesis is on the power electronic converter system challenges associated with the grid integration of variable-renewable-energy (VRE) sources like wave, marine current, tidal, wind, solar etc. Wave energy conversion with grid integration is used as the key reference, considering its high energy potential to support the future clean energy requirements and due the availability of a test facility at Uppsala University. LÄS MER
3. Energy Efficiency of an Electric Vehicle Propulsion Inverter Using Various Semiconductor Technologies
Sammanfattning : In this Licentiate thesis, various solutions to improve the efficiency in the electrical vehicledrive drive line such as in the propulsion inverter and in the electric machine, are proposedand their benefits are quantified from an energy efficiency point of view. The efficiencyanalysis is based on modeling of a power electronics inverter, an electric machine and abattery in various drive cycles of an electric vehicle. LÄS MER
4. Energy-efficient Generating System for HVDC Off-shore Wind Turbine
Sammanfattning : This thesis investigates the design of energy efficient generating systems for off-shore wind turbines. For the generator part of the electric drive system, a surface mounted permanent magnet synchronous generator (SPMSG), an interior permanent magnet generator (IPMSG) as well as a synchronous reluctance generator (SynRG) have been investigated. LÄS MER
5. Control and Optimization of Fuel Cell Based Powertrain for Automotive Applications
Sammanfattning : Fuel cell powered electric vehicles, with fast-refueling time, high energy density, and zero CO2 emissions, are becoming a promising solution for future fossil-free transportation. However, the relatively slow dynamic response and the inability of recovering the regenerative energy make vehicles solely powered by fuel cells not an immediately attractive solution. LÄS MER