Essays about: "Elvira Niemelä"
Found 2 essays containing the words Elvira Niemelä.
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1. Real-Time Rotor Temperature Estimation Method for Interior Permanent Magnet Synchronous Machines : A method using a Lumped Parameter Thermal Network in combination with an estimation algorithm: implementation and comparison of a Dual Kalman Filter and a Dual Observer
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : Accurate knowledge of the temperature of a Permanent Magnet Synchronous Machine is of high importance, not only to ensure safe operation and improve control of the operating point, but also to avoid irreversible demagnetization of rare-earth permanent magnets. However, direct measurement using thermal sensors is not suitable for high volume and low-cost applications, due to costly sensor installation and maintenance, and therefore, the magnet temperature needs instead to be estimated. READ MORE
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2. Fast Power Support of Electrical Batteries in Future Low Inertia Power Systems
University essay from KTH/Hållbar utveckling, miljövetenskap och teknikAbstract : To create more sustainable power systems, as well as achieve environmental goals, further integration of Renewable Energy Sources (RES) is essential. However, this may result in a power system more vulnerable to disturbances, since RES do not contribute to the system’s inertia. READ MORE