Now showing items 1-9 of 9

• #### Apparatus for loss measurements under multidirectional and dc-bias flux in electrical steel laminations ﻿

(Peer reviewed; Journal article, 2020)
Conventional standardized power loss measurements for electric steels are performed at flux densities with a single sinusoidal and unidirectional excitation. However, the flux inside electrical steel laminations can deviate ...
• #### Cavities in Mass-Impregnated HVDC Subsea Cables Studied by AC Partial Discharge Measurements ﻿

(Journal article; Peer reviewed, 2019)
Partial discharge measurements have been used for studying shrinkage voids in the insulation of mass-impregnated high voltage DC subsea power cables. Three 4.5-m long cable samples were subjected to ac partial discharge ...
• #### Comparison of Levelized Cost of Energy of superconducting direct drive generators for a 10 MW offshore wind turbine ﻿

(Journal article; Peer reviewed, 2018)
A method for comparing the Levelized Cost of Energy (LCoE) of different superconducting drive trains is introduced. The properties of a 10 MW MgB$_{2}$ superconducting direct drive generator are presented in terms weight ...
• #### Fabrication of a scaled MgB2 racetrack demonstrator pole for a 10 MW direct drive wind turbine generator ﻿

(Journal article; Peer reviewed, 2018)
Field windings made of MgB2 wires or tapes are considered for their potential to reduce volume, weight and cost of large offshore wind turbine generators. To gain experience of how to use this relatively new material in ...
• #### Hysteresis losses in MgB2 superconductors exposed to combinations of low AC and high DC magnetic fields and transport currents ﻿

(Peer reviewed; Journal article, 2014)
MgB2 superconductors are considered for generator field coils for direct drive wind turbine generators. In such coils, the losses generated by AC magnetic fields may generate excessive local heating and add to the thermal ...
• #### Internal pressures and pressure gradients in mass-impregnated HVDC cables during current cycling ﻿

(Peer reviewed; Journal article, 2020)
The internal pressures in the insulation of two 5-m long pieces of a state-of-the art mass-impregnated non-draining subsea cable have been measured under load current cycling at ambient temperatures ranging from 3 to 37 ...
• #### Modelling of Internal Pressure Dynamics in Mass-Impregnated Non-Draining HVDC Cables ﻿

(Peer reviewed; Journal article, 2022)
Changing the current loading of mass-impregnated non-draining power cables causes the pressure in the insulation to vary over a wide range. It is generally recognized that under certain conditions—typically after a large ...
• #### Optimization and comparison of superconducting generator topologies for a 10 MW wind turbine application ﻿

(Journal article; Peer reviewed, 2017)
• #### Testing of an MgB2 coil for a wind turbine generator pole ﻿

(Peer reviewed; Journal article, 2021)
We report on the testing of a 1 m long and 0.5 m wide racetrack coil wound from 4.5 km of MgB2 tape-shaped superconductors with a copper strip soldered to the nickel matrix. The cross-section of the coil corresponds to ...