Sökning: "Staffan Ström"

Hittade 2 avhandlingar innehållade orden Staffan Ström.

1. 1. A study of the unitary representations of some space-time transformation groups

   Författare :Staffan Ström; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : .... LÄS MER

3. 2. On the design of hybrid DC-breakers consisting of a mechanical switch and semiconductor devices

   Författare :Jesper Magnusson; Göran Engdahl; Staffan Norrga; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DC; circuit breaker; hybrid breaker; DC systems; DC; brytare; hybridbrytare; likström;

   Sammanfattning : The interest of using direct current in networks for both transmission and distribution of power is increasing due to the higher efficiency compared to the alternating current used today. As no natural zero crossings exist in direct current, the interruption of fault currents becomes a challenge. LÄS MER