Essays about: "Back EMF."

Showing result 1 - 5 of 10 essays containing the words Back EMF..

  1. 1. Developing a Graphical Application to Control Stepper Motors with Sensorless Load Detection

    University essay from Uppsala universitet/Institutionen för informationsteknologi

    Author : Mattias Adolfsson; [2021]
    Keywords : Stepper motor; Sensorless; Load detection; Back-EMF; Graphical control; StallGuard; Homing; Linear stage;

    Abstract : 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. READ MORE

  3. 2. Performance analysis of motor for electric aviation

    University essay from

    Author : Torkel Svenson Hagström; [2020]
    Keywords : ;

    Abstract : 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. READ MORE

  4. 3. Design and implementation of sensor-based and sensorless control of a PMSM test system

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Oskar Giesecke; [2019]
    Keywords : ;

    Abstract : 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. READ MORE

  5. 4. Implementation and experimental evaluation of a parameterized PMSynRM model using Matlab and Comsol Multiphysics

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Israt Jahan; [2019]
    Keywords : Comsol Multiphysics; eddy-current losses; permanent-magnet synchronous reluctance motors; reluctance; Comsol Multiphysics; virvelströmsförluster; permanentmagnet synkrona reluktansmotorer; reluktans;

    Abstract : 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. READ MORE

  6. 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

    University essay from Uppsala universitet/Institutionen för teknikvetenskaper

    Author : Roberto Felicetti; [2018]
    Keywords : asynchronous start; current control; damping bars; damper winding; d-axis; q-axis; hunting; natural frequency; Park s reference frame; rotor back-EMF; rotor oscillations; synchronous motor;

    Abstract : 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. READ MORE