Change search
Refine search result
1 - 9 of 9
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1.
    Eriksson, Sture
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
    Electrical Machine Development: a study of four different machine types from Swedish perspective2007Doctoral thesis, monograph (Other scientific)
    Abstract [en]

    Development and manufacturing of rotating electrical machines have been essential for the Swedish society and industry for more than a century. The dominating manufacturer has been Asea/ABB, even if a more diversified structure has emerged in recent years. The thesis deals primarily with Asea/ABB’s development of four kinds of electrical machines, although reflected against a wider national and international background. The purpose of the research has been to study the development of these machines and the related industrial processes, focusing on factors with a major influence on the development.

    The thesis contains introductory chapters presenting the research, the public importance of electrical machines, their initial history, as well as a technical introduction of the machines and the development process. The main chapters start with standard induction motors which are manufactured in large numbers and can be seen as a commodity with little product differentiation. The development focus has been on rational production and increased use for frequency controlled variable speed drives. Large directly water-cooled turbogenerators were developed for nuclear power plants, in the 1970’s, and created initially many difficulties. Advanced technologies and strategic matters have been strongly interlinked in this development, which is described comprehensively in the thesis. Electrical machines for automotive drivelines have, in recent years, been subject to intensive international development and several new concepts have been introduced. The thesis analyzes the Swedish attempts that have been technically satisfactory but have not led to commercial products. ABB launched synchronous machines for very high voltages as a revolutionary product ten years ago, but without commercial success. This controversial development and the difficult business situation are subject for discussion in the fourth main chapter

    The study presents conclusions, concerning the development, individually for each machine type, but also comparisons based on divisions in large and small machines and in mature and new technologies. A common result is that the development, in retrospect, has been more successful from technical point of view than from commercial, independently whether the development has been market or technology driven. An important contribution of the thesis is that it presents the first comprehensive Swedish study of electrical machine development and which factors have been most influential. The thesis ends with a discussion of future prospects for the Swedish electrical machine industry and the possibilities and threats it is facing.

  • 2.
    Eriksson, Sture
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
    Swedish induction motors made in the USSR2009In: EUROCON 2009: INTERNATIONAL IEEE CONFERENCE DEVOTED TO THE 150 ANNIVERSARY OF ALEXANDER S. POPOV, VOLS 1- 4, PROCEEDINGS, NEW YORK: IEEE , 2009, p. 1043-1047Conference paper (Refereed)
    Abstract [en]

    The Swedish electro-technical company ASEA reached very early a leading position in development and manufacturing of 3-phase generators and motors. Russia was one of ASEA's most important markets and it planned to start local production in the country. The revolution delayed these plans but finally an ASEA motor factory started in Yaroslavl in 1928. It was then one of the world's most modern induction motor factories. The factory was sold to the USSR in 1932 and it still remains an electric motor factory, nowadays named ELDIN.

  • 3.
    Eriksson, Sture
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics (closed 20110930).
    The electrical power engineering profession in Sweden - Overview and milestones2009In: Proceedings of 2009 IEEE Conference on the History of Technical Societies, IEEE , 2009, p. 381-385Conference paper (Refereed)
    Abstract [en]

    Sweden is highly electrified and the electrical power engineers have had an important role in this development. Fundamental for these engineers is their education, their working experience, and their professional network. The Swedish development over time of these factors is highlighted. Organizations for engineers are essential parts of their network and the country has a long tradition in this respect. It started with local and national assemblies, but international organizations have successively grown in importance.

  • 4.
    Eriksson, Sture
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
    The Swedish development of turbogenerators with directly water-cooled rotors2007In: 2007 IEEE Conference on the History of Electric Power, 2007, p. 83-90Conference paper (Refereed)
    Abstract [en]

    Large steam turbine-driven generators rated at a few hundred MW and higher constitute, in many respects, a big engineering challenge. The Swedish manufacturer of heavy electrical equipment, Asea was faced with this challenge in the late sixties, when the company started to develop such generators for nuclear power plants. Due to the company's background, it was necessary to choose new design concepts, and Asea decided on a very unique concept, turbogenerators with directly water-cooled rotors. The development led to difficult teething problems before the generators could be delivered and operate satisfactory; a process, which took around a decade to complete. Since then, the operation records have been very good. These turbogenerators constitute the only existing group with a significant number of two-pole, directly water-cooled rotors. The background, the development and results are summarized in this paper.

  • 5.
    Eriksson, Sture
    et al.
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
    Alakula, Mats
    Education as part of the Swedish "Green car" R&D program2006In: 2006 IEEE VEHICLE POWER AND PROPULSION CONFERENCE, NEW YORK: IEEE , 2006, p. 81-84Conference paper (Refereed)
    Abstract [en]

    The Swedish government and the automotive industry cooperate in HEV related research programs, which primarily are carried out as postgraduate university projects. The aim is both to achieve technical results and to educate PhD graduated researchers for the industry. Two coordinated programs have resulted in an extensive network of specialists from academia and industry. A number of courses have also been developed for undergraduate students with focus on HEV related subjects. These are common for five technical universities. Special attention is paid to the Hybrid Vehicle Drives course and how the students step by step learn to use more accurate models for simulation of HEV performance.

  • 6.
    Eriksson, Sture J A
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics (closed 20110930).
    125 years running2008In: ABB Review, ISSN 1013-3119, no 1, p. 81-86Article in journal (Refereed)
    Abstract [en]

    ABB has contributed significantly for the development of electrical machines and motors for industrial and infrastructure application in its 125 years of business. The electrical machines are subjected to various types of stresses such as electrical, mechanical, thermal, and chemical. The company's 125 years of development has focused on customer's need for more reliable and cost-effective machines. The company has also developed very efficient systems such as hydrogen-cooling and direct water-cooling systems, used for very large machines. The electrical machines developed by ABB are more cost-effective with an increased specific output. The largest synchronous motor built by the company is rated at 55MW. ABB has also launched a radically different type of synchronous generator for very high voltages and is aimed to develop electrical machines with superconducting excitation windings.

  • 7.
    Magnussen, Freddy
    et al.
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics (closed 20110930).
    Chin, Yung-Kang
    KTH, Superseded Departments, Electrical Systems.
    Soulard, Juliette
    KTH, Superseded Departments, Electrical Systems.
    Broddefalk, A.
    Eriksson, Sture J A
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics (closed 20110930).
    Sadarangani, Chandur
    KTH, Superseded Departments, Electrical Systems.
    Iron losses in salient permanent magnet machines at field-weakening operation: COVERING THEORY TO PRACTICE2004In: CONFERENCE RECORD OF THE 2004 IEEE INDUSTRY APPLICATIONS CONFERENCE, VOLS 1-4: COVERING THEORY TO PRACTICE, NEW YORK, NY: IEEE , 2004, p. 40-47Conference paper (Refereed)
    Abstract [en]

    Permanent magnet machines for electric vehicles are often designed with a magnetic saliency to improve the torque generation as a result of the reluctance torque at field-weakening operation. The armature reaction is pronounced in such operation, leading to extensive magnetic field harmonics in the teeth and consequently iron losses. This paper analyses the iron losses in two designed machine topologies, inset and interior permanent magnet rotor structures, by measurements and finite element method computations. The measurements and calculations are performed on three prototypes-one with an in set design and two with an equal interior design, but different laminated stator core sheet thickness of 0,35 and 0,20 mm, respectively. The three machines have the same stator designs and water-cooled housings.

  • 8.
    Nordlund, Erik
    et al.
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
    Eriksson, Sture
    KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.
    Test and verification of a four-quadrant transducer for HEV applications2005In: 2005 IEEE Vehicle Power and Propulsion Conference (VPPC), 2005, p. 37-41Conference paper (Refereed)
    Abstract [en]

    This work concerns the design, building and testing of a prototype four-quadrant energy transducer (4QT) for hybrid electric vehicles [1], [6]. The paper describes the test and verification of the 4QT prototype concerning machine parameters, efficiency and thermal performance. The 4QT consists of two different electric radial flux machines: one double rotor machine (DRM) and one conventional machine. In this paper, the conventional machine will simply be referred to as the stator machine (SM). The prototype is designed for a power of 30kW in each of the double rotor machine and the stator machine [2]. The double rotor machine has an inner rotor with a 3-phase winding fed through sliprings and an outer rotor with inner permanent magnets. The outer rotor has also a set of magnets on its outside and serves therefore as rotor for the stator machine. The input shaft is connected to the inner rotor and the output shaft to the outer rotor. Both machines are designed to work as motors and generators. The 4QT is mounted between the internal combustion engine (ICE) and the final reduction gear in a hybrid vehicle; the ICE is connected to the input shaft and the final gear to the output shaft. The function of the 4QT is to keep the operation of the ICE at optimum efficiency at all speeds and torques required by the vehicle. To do so, the speed is controlled with the DRM and the torque with the SN'll.

  • 9. Zheng, Ping
    et al.
    Thelin, Peter
    KTH, Superseded Departments, Electrical Systems.
    Nordlund, Erik
    Eriksson, Sture
    KTH, Superseded Departments, Electrical Systems.
    Sadarangani, Chandur
    KTH, Superseded Departments, Electrical Systems.
    Consideration of Skewed Slots in the Performance Calculations of a Four-Quadrant Transducer2004In: Proceedings of IEEE VTS Vehicle Power and Propulsion symposium, 2004Conference paper (Refereed)
1 - 9 of 9
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf