Sökning: "Inverter"
Visar resultat 21 - 25 av 92 avhandlingar innehållade ordet Inverter.
21. 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
22. Analysis of Losses in Inverter-fed Synchronous Machines with Salient-pole Solid Rotors
Sammanfattning : The work that is presented here considers loss analysis of inverter-fed field-excited synchronous machines. The project was initiated, as a co-operation between industrial partners and KTH, with the aim of providing knowledge about the losses that take place in inverter-fed large scale synchronous machines. LÄS MER
23. Modular Battery Systems for Electric Vehicles based on Multilevel Inverter Topologies - Opportunities and Challenges
Sammanfattning : Modular battery systems based on multilevel inverter (MLI) topologies can possibly overcome some shortcomings of two-level inverters when used for vehicle propulsion. The results presented in this thesis aim to point out the advantages and disadvantages, as well as the technical challenges, of modular vehicle battery systems based on MLIs in comparison to a conventional, two-level IGBT inverter drivetrain. LÄS MER
24. Analysis of Inverter-fed Losses on the Solid Rotor of Large-scale Synchronous Machines
Sammanfattning : .... LÄS MER
25. Voltage Support of Transmission Grids Using Resources Located in the Underlying Lower Voltage Networks : Unlocking the Potential of Distributed Generation Reactive Power Capabilities
Sammanfattning : The path to sustainable, fossil-free future leads to inevitable energy transition towards renewable energy sources. A part of this transition includes replacement of conventional transmission system connected power plants with distributed renewables plants such as wind power. LÄS MER