Sökning: "Lumped Element Modelling"
Visar resultat 1 - 5 av 6 uppsatser innehållade orden Lumped Element Modelling.
1. Rotor Dynamic Modeling of Hydropower Rotors by 3D-Finite Element Analysis
Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematikSammanfattning : By using the rotor dynamic capabilities of Simcenter Nastran Rotordynamics, an eigenvalue analysis of 3D-finite element models of the Jeffcott rotor and the overhung rotor were conducted and compared to the results with beam-based, lumped parameter models. The first two critical speeds of the Jeffcott rotor were estimated with variations of 3. LÄS MER
2. Design, simulation, and testing of an electric propulsion cluster frame
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : In general, electric propulsion offers very high efficiency but relatively low thrust. To remedy this, several ion engines can be assembled in a clustered configuration and operated in parallel. This requires the careful design of a frame to accommodate the individual propulsion systems. LÄS MER
3. Differential Millimetre Wave On-Chip Inductors
Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknikSammanfattning : The increasingly interconnected world requires systems that support high data rates, and thus the development of mm-wave systems is necessary. Automotive collision radar (80 GHz) or WLANs (60 GHz) are one of the applications that led the increment of the demand in RFICs, in which monolithic devices are fundamental, such as on-chip inductors or transformers. LÄS MER
4. High-Frequency Voltage Distribution Modelling of a Slotless PMSM from a Machine Design Perspective
Master-uppsats, KTH/ElkraftteknikSammanfattning : The introduction of inverters utilizing wide band-gap semiconductors allow for higher switching frequency and improved machine drive energy efficiency. However, inverter switching results in fast voltage surges which cause overvoltage at the stator terminals and uneven voltage distribution in the stator winding. LÄS MER
5. Modelling a piezoelectric-driven actuator for active flow control
Master-uppsats, Linköpings universitet/Reglerteknik; Linköpings universitet/Tekniska högskolanSammanfattning : Flow control is an area of research of particular interest within automotive and aerospace industries since methods used to affect the fluid flow around vehicles can reduce drag and therefore lower their fuel consumption. One of these methods, which has generated a lot of interest in later years, is called active flow control and uses different types of actuators to impact the surrounding flow. LÄS MER