Sökning: "synchronous machine"

Visar resultat 1 - 5 av 55 uppsatser innehållade orden synchronous machine.

  1. 1. A machine-learning approach to estimating the performance and stability of the electric frequency containment reserves

    Master-uppsats, KTH/Optimeringslära och systemteori

    Författare :Henrik Ekestam; [2018]
    Nyckelord :;

    Sammanfattning : For a number of years, the frequency quality has been decreasing in the Nordic synchronous area. The Revision of the Nordic Frequency Containment Process project has introduced a proposed set of pre-qualification requirements to ensure the stability and performance of frequency containment reserves. LÄS MER

  2. 2. Sensorless algorithm for synchronous machines using current oversampling and PWM harmonics

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Giorgio Gullone; [2018]
    Nyckelord :;

    Sammanfattning : Sensorless-controlled drives represent a solution drawing an increasinglyimportant attention for the benefits they entail. At the cost ofa slightly lower dynamics compared with the traditional drives, theyinvolve a reduction of the system costs and complexity and improvednoise immunity and reliability. LÄS MER

  3. 3. 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 teknikvetenskaper

    Författare :Roberto Felicetti; [2018]
    Nyckelord :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;

    Sammanfattning : 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

  4. 4. Model Predictive Control of Electric Drives -Design, Simulation and Implementation of PMSM Torque Control

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Levente Zsolt Pap; [2018]
    Nyckelord :PMSM; Field Oriented Control; Model Prediction Control; Inverter; Electric Drive; DSP;

    Sammanfattning : The thesis deals with the design of a permanent magnet synchronous machine controller that isimplemented on an embedded platform to replace the off-the-shelf controller currently being used in theelectric race car of the KTH Formula Student team. Software implementation of the control algorithmwas tested in laboratory environment on the hardware prototype of a 2-level three-phase voltage sourceinverter. LÄS MER

  5. 5. Design and comparison of PMaSynRM versus PMSM for pumping applications

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Viktor Briggner; [2018]
    Nyckelord :Demagnetization; economic evaluation; permanent magnet assistance; synchronous reluctance machine; Avmagnetisering; ekonomisk utv¨ardering; permanentmagnetassistans; synkron reuktansmaskin;

    Sammanfattning : This master thesis aimed to design a permanent magnet assisted synchronous reluctancemachine (PMaSynRM) rotor for pump applications which were to be implemented inan existing Induction Machine stator. The machine were to be compared with a similarpermanent magnet synchronous machine (PMSM) with similar torque production in termsof cost and performance. LÄS MER