Sökning: "torque ripple"

Visar resultat 11 - 15 av 23 uppsatser innehållade orden torque ripple.

  1. 11. Construction, testing and verification of a brushless excitation system with wireless control of the field current in a synchronous generator.

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Rickard Larsson; Kenny Andersson; [2018]
    Nyckelord :Brushless excitation; synchronous generator; bluetooth; torque ripple; Borstlös matning; synkrongenerator; blåtand; momentpulsationer;

    Sammanfattning : Synchronous generators have been used in hydropower from more than a century where, traditionally, the field current is transferred to the rotor using slip rings and carbon brushes. There are some major disadvantages following the use static excitation; regular and expensive maintenance, as well as a source of carbon dust which, due to buildup, may cause short circuits. LÄS MER

  3. 12. Material choice for a rotor in a switched reluctance high speed motor

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Christoffer Christiansen; [2017]
    Nyckelord :SRM; switched reluctance motor; Electrical Steel; Materials;

    Sammanfattning : With the increasing environmental impact from the automotive industry, electric vehicles become more and more popular. This combined with the great breakthroughs in fast electronics the switched reluctance motor (SRM) has again gained popularity in recent years. LÄS MER

  4. 13. Design and Analysis of a Fractional-Slot Concentrated-Wound PM-Assisted Reluctance Motor

    Uppsats för yrkesexamina på avancerad nivå, KTH/Elektrisk energiomvandling

    Författare :Luigi Marino; [2015]
    Nyckelord :concentrated windings; demagnetization; distributed windings; ferrite; finite element method; loss distribution; natural and over compensation; overlaod; permanentmagnet assisted synchronous reluctance motors; permanent magnets; rare earth magnets NdFeB ; reluctance torque; temperature effects; torque ripple; avmagnetisering; ferrit; finita elementmetoden; fördelade lindningar; förlust distribution; koncentrerade lindningar; momentrippel; naturligt och överkompensation; permanentmagnet assisterad synkron reluktansmotorer; permanentmagneter; reluktansvridmomentet; sällsynta jordmagneter NdFeB ; temperatureffekter; överbelastning;

    Sammanfattning : The aim of this master thesis is to design and analyse a FSCW PMaSynRM (Permanent Magnet assisted Synchronous Reluctance Motor) for industrial applications. The design process includes analytical calculations (initial design and PM amount minimization) and nite element method (FEM) based design optimization. LÄS MER

  5. 14. Design and Analysis of a Fractional-Slot Concentrated-Wound Permanent-Magnet-Assisted Synchronous Reluctance Machine

    Uppsats för yrkesexamina på avancerad nivå, KTH/Elektrisk energiomvandling

    Författare :Celia Carvajal Almendros; [2015]
    Nyckelord :Demagnetization; finite element method; flux-weakening; fractional slot concentrated winding; overload capability; permanent magnet assisted synchronous reluctance machine; torque ripple; Avmagnetisering; finita elementmetoden; fältförsvagning; koncentrerade lindningar; momentrippel; permanentmagnetassisterad synkron reluktansmaskin; överbelastningskapacitet;

    Sammanfattning : The growing need for simpler and cheaper manufacturing process has led to the research into fractional-slot concentrated-wound (FSCW) motors. This concept has been widely investigated for surface-mounted permanent magnet (SMPM) machines. This thesis studies the same concept applied for synchronous reluctance machines (SynRM). LÄS MER

  7. 15. Design and Simulation of Field Oriented Control and Direct Torque Control for a Permanent Magnet Synchronous Motor with Positive Saliency

    Uppsats för yrkesexamina på grundnivå, Elektricitetslära

    Författare :Anders Kronberg; [2012]
    Nyckelord :field oriented control; direct torque control; salient pole; saliency; permanent magnet motor;

    Sammanfattning : The researchers at the Department of Electricity at Uppsala University has recently entered the field of electric motor design, however no real knowledge of motor control of salient pole permanent magnet motors exists in the department. This thesis will present a general description of the control method of motors that exist today, this has been done by reviewing existing literature. LÄS MER