Sökning: "relativ permeabilitet"
Hittade 4 uppsatser innehållade orden relativ permeabilitet.
1. Numerical Simulations of Wave Propagation between a Left-Handed Material and a Right-Handed Material
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : The discovery of metamaterials has led to major advances in different fields of physics including optics, microwave engineering and acoustics. Specific to theoretical electromagnetism, the introduction of metamaterials have led to the development of negative-index materials (NIMs) with simultaneous negative permittivity and negative permeability with backward-wave propagation. LÄS MER
2. Framställning av magnetisk polymerkomposit : Stålpulverfylld epoxi med magnetiska egenskaper
Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Tillämpad materialvetenskapSammanfattning : To compete with other manufacturing companies in the market, product design and manufacturing methods need to be improved constantly. To save time and money, there is an advantage if there is a manufacturing plan in place before designing the final product. LÄS MER
3. 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
4. Manufacturing Effects on Iron Losses in Electrical Machines
Master-uppsats, KTH/Elektrisk energiomvandlingSammanfattning : In this master thesis, the magnetic properties of SiFe laminations after cutting and welding are studied. The permeability and the iron loss density are investigated since they are critical characteristics for the performance of electrical machines. LÄS MER