Essays about: "relativ permeabilitet"
Found 3 essays containing the words relativ permeabilitet.
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1. Numerical Simulations of Wave Propagation between a Left-Handed Material and a Right-Handed Material
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : 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. READ MORE
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2. High-Frequency Voltage Distribution Modelling of a Slotless PMSM from a Machine Design Perspective
University essay from KTH/ElkraftteknikAbstract : 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. READ MORE
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3. Manufacturing Effects on Iron Losses in Electrical Machines
University essay from KTH/Elektrisk energiomvandlingAbstract : 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. READ MORE