SwePub
Sök i SwePub databas

  Extended search

Träfflista för sökning "WFRF:(Bolund Björn) "

Search: WFRF:(Bolund Björn)

  • Result 1-10 of 23
Sort/group result
   
EnumerationReferenceCoverFind
1.
  •  
2.
  •  
3.
  • Bolund, Björn, 1978- (author)
  • Electric Power Generation and Storage Using a High Voltage Approach
  • 2006
  • Doctoral thesis (other academic/artistic)abstract
    • Production and consumption of electricity have grown enormously during the last century. No mater what the primary source of energy is, almost all generation of electricity comes from conversion of a rotational movement in a generator. The aim of this thesis is to see how high voltage technology influence production and storage of electricity. Power flow in the generators used to convert mechanical movement to electric energy is analyzed using Poynting‘s vector. The impact of new generator technology for efficient extraction of hydroelectric power is shown. Simulation of a large permanent magnet turbo generator is presented. A flywheel storage system for electric vehicles utilizing high voltage technology is also presented. In pulsed power applications, a cheap method for intermediate storage of energy during milliseconds, which enables an inductive primary storage is presented and experimentally tested.
  •  
4.
  • Bolund, Björn, et al. (author)
  • Flywheel energy and power storage systems
  • 2007
  • In: Renewable & sustainable energy reviews. - : Elsevier BV. - 1364-0321 .- 1879-0690. ; 11:2, s. 235-258
  • Journal article (peer-reviewed)abstract
    • For ages flywheels have been used to achieve smooth operation of machines. The early models where purely mechanical consisting of only a stone wheel attached to an axle. Nowadays flywheels are complex constructions where energy is stored mechanically and transferred to and from the flywheel by an integrated motor/generator. The stone wheel has been replaced by a steel or composite rotor and magnetic bearings have been introduced. Today flywheels are used as supplementary UPS storage at several industries world over. Future applications span a wide range including electric vehicles, intermediate storage for renewable energy generation and direct grid applications from power quality issues to offering an alternative to strengthening transmission. One of the key issues for viable flywheel construction is a high overall efficiency, hence a reduction of the total losses. By increasing the voltage, current losses are decreased and otherwise necessary transformer steps become redundant. So far flywheels over 10 kV have not been constructed, mainly due to isolation problems associated with high voltage, but also because of limitations in the power electronics. Recent progress in semi-conductor technology enables faster switching and lower costs. The predominant part of prior studies have been directed towards optimising mechanical issues whereas the electro technical part now seem to show great potential for improvement. An overview of flywheel technology and previous projects are presented and moreover a 200 kW flywheel using high voltage technology is simulated.
  •  
5.
  •  
6.
  •  
7.
  • Bolund, Björn, et al. (author)
  • Poynting theorem applied to cable wound generators
  • 2008
  • In: IEEE transactions on dielectrics and electrical insulation. - 1070-9878 .- 1558-4135. ; 15:2, s. 600-605
  • Journal article (peer-reviewed)abstract
    • The use of cable windings in generators and transformers has a physical background which is hard to neglect. The work done by Maxwell, Poynting and Slepian combined with powerful finite element solver of today allows for visualization of electric and magnetic fields in different geometries. The electromagnetic fields and power flows for generator stator cables are in this article associated with Poynting's theorem. Geometrical design and insulation material properties are then linked to Poynting's theory showing that circular stator cables enable higher voltages while maintaining a high power flow. Today several high voltage generators and two transformers have been built and are currently in operation. This paper discusses the application of the Poynting Theorem to cable wound generators.
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Result 1-10 of 23
Type of publication
journal article (11)
conference paper (6)
other publication (3)
reports (1)
doctoral thesis (1)
licentiate thesis (1)
show more...
show less...
Type of content
peer-reviewed (13)
other academic/artistic (10)
Author/Editor
Bolund, Björn (21)
Leijon, Mats (18)
Bernhoff, Hans (8)
Lundin, Urban (6)
Eriksson, Mikael (5)
Thorburn, Karin (4)
show more...
Boström, Cecilia (3)
Svensson, Olle (3)
Waters, Rafael (3)
Sundberg, Jan (2)
Isberg, Jan (2)
Larsson, Anders (1)
Jansson, Anders (1)
Larsson, Stefan (1)
Berglund, Mats (1)
Eiler, Stefan (1)
Kaljuste, Olavi (1)
Ahlbeck Bergendahl, ... (1)
Axenrot, Thomas (1)
Florin, Ann-Britt (1)
Lundström, Karl (1)
Sundelöf, Andreas (1)
Sundblad, Göran (1)
Carlson, Ola, 1955 (1)
Östman, Örjan (1)
Holmgren, Noél (1)
Danielsson, O (1)
Gustafsson, Stefan (1)
Nilsson, Karin (1)
Wennerström, Lovisa (1)
Andersson, Johnn, 19 ... (1)
Magnusson, Katarina (1)
Fredriksson, Ronny (1)
Danielsson Fängström ... (1)
Larsson, Tobias (1)
Lindelöf, Ulf (1)
Lord, Roland (1)
Losman, Birgitta (1)
Möller, Patrik (1)
Sidenmark, Mikael (1)
Waller, Erica (1)
Eriksson, Sandra (1)
Yngwe, Rickard (1)
Nyholm, S. E. (1)
Sundin, Josefin (1)
Bohman, Patrik (1)
Ogonowski, Martin (1)
Rogell, Björn (1)
Strömberg, Helena (1)
Engström, Jens (1)
show less...
University
Uppsala University (21)
Chalmers University of Technology (1)
Swedish University of Agricultural Sciences (1)
Swedish Agency for Marine and Water Management (1)
Language
English (14)
Undefined language (7)
Swedish (2)
Research subject (UKÄ/SCB)
Natural sciences (1)
Agricultural Sciences (1)
Social Sciences (1)

Year

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view