Sökning: "back-EMF"
Visar resultat 1 - 5 av 11 uppsatser innehållade ordet back-EMF.
1. Developing a Graphical Application to Control Stepper Motors with Sensorless Load Detection
Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för informationsteknologiSammanfattning : For positioning of linear stages in absolute coordinates, there is a general need to find a reference position since the initial one is unknown. This is commonly called homing. To reduce costs and facilitate assembly, homing can be performed without additional sensors, known as sensorless homing. LÄS MER
2. Performance analysis of motor for electric aviation
Uppsats för yrkesexamina på avancerad nivå,Sammanfattning : With a rising interest and improving technology regarding electric aviation, the Swedish ELISE-project aims to built a functional 21-seated electric aircraft by the year 2025. The aim of this thesis is to analyze the performance of a scalable model of an electric motor optimized for aircraft, in terms of magnetic leakage flux, generated back-EMF, torque constant and efficiency. LÄS MER
3. Design and implementation of sensor-based and sensorless control of a PMSM test system
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Transportation of liquids and gasses in industries in forms of pumping and fanning, constitutes asignificant part of the world-wide electric energy consumption. In order to meet global environmentalgoals of greenhouse gas emissions and sustainable material usage, the development of efficiency andtechnical lifetime of industrial pump and fan technology, are key. LÄS MER
4. Implementation and experimental evaluation of a parameterized PMSynRM model using Matlab and Comsol Multiphysics
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : This thesis focuses on modelling of the permanent magnet synchronous reluctancemotor (PMSynRM), which has drawn considerable attention by researchers thanks toits high efficiency and wide range of speed operation. Comparisons with measurementsfrom a four-pole PMSynRM with four barriers and 24 stator slots have been carriedout. LÄS MER
5. Field Current Control for the Damping of Rotor Oscillations and for the Alternative Start of Synchronous Machines : Further Innovative Applications of Field Current Active Control besides UMP-Compensation
Master-uppsats, Uppsala universitet/Institutionen för teknikvetenskaperSammanfattning : The possibility to save energy in synchronous machines operation by dismissing d-axis damping bars and surrogating them with active excitation current control in sectored field winding is proved. In particular a way to recover the energy of rotor oscillations during power regulation is shown by means of a studycase generator whereas a self-starting machine is analytically and numerically designed in view of its next construction and test. LÄS MER