Sökning: "Unbalanced operation"

Visar resultat 1 - 5 av 14 avhandlingar innehållade orden Unbalanced operation.

  1. 1. Design and analysis of a fault-tolerant fractional slot PMSM for a vehicle application

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Christian Dubar; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Saturation; Fractional slot; Permanentmagnet synchronousmachine PMSM ; Fault-tolerance; Concentrated; windings; Unbalanced operation;

    Sammanfattning : The permanent magnet synchronous motor (PMSM) is an interesting alternative for an electric motor drive system in automotive applications, due to to the high efficiency requirement; as only a limited amount of energy can be stored in the relatively expensive battery. Another advantage is the high torque and power density a PMSM can achieve since it is very important to save especially space but also weight in vehicle applications. LÄS MER

  2. 2. Design of a fault-tolerant fractional slot PMSM for a vehicle application

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :Christian Dubar; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PMSM; Efficiency; Fault-tolerant; Unbalanced operation; Saturation; Fault-tolerance; Fractional slot; Permanent magnet synchronous machine; PMSM ; Concentrated windings;

    Sammanfattning : In automotive applications, the PMSM is an interesting alternative due to the high efficiency requirement; as only a limited amount of energy can be stored in the relatively expensive battery. Another advantage is the high torque and power density since it is very important to save especially space but also weight in vehicle applications. LÄS MER

  3. 3. Measurement and modelling of unbalanced magnetic pull in hydropower generators

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Mattias Wallin; Uppsala universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Damper winding; eddy currents; field winding short circuit; finite element method; hydropower generator; parallel circuits; rotor eccentricity; salient poles; synchronous generators; synchronous machines; UMP; unbalanced magnetic pull.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Hydropower research is often perceived to be an old and exhausted field of study but with ageing equipment and the need for more intermittent operation caused by an increased share of other renewable energy sources new challenges lie ahead.The main focus of this dissertation are the electromagnetic forces resulting from nonuniform air gap flux, whether it be caused by rotor eccentricity or a faulty field winding. LÄS MER

  4. 4. Operation and control of cascaded H-bridge converter for STATCOM application

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ehsan Behrouzian; [2016]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Modular Multilevel Converters MMC ; STATCOM; FACTS.; cascaded H-bridge converters;

    Sammanfattning : In the last decade, particular attention has been paid to the use of Modular Multilevel Converters(MMC) for grid applications. In particular, for STATCOM applications the phase leg ofthe converter is constituted by a number of single-phase full-bridge converters connected incascade (here named Cascaded H-Bridge, CHB, converter). LÄS MER

  5. 5. On the dynamics of an hydropower generator subjected to unbalanced magnetic pull : characterisation and analysis

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Yogeshwarsing Calleecharan; Luleå tekniska universitet.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Eccentricity leading to unbalanced magnetic pull (UMP) in rotating electrical machines is a significant concern in industry. The UMP arises due to magnetic flux crossing the air-gap between the rotor and stator, and can be more intense than the useful peripheral force that the machine develops. LÄS MER