AC losses in HTS coils for high-frequency and non-sinusoidal currents

B.J.H. de Bruyn; J.W. Jansen; E.A. Lomonova

doi:10.1088/1361-6668/aa7c74

AC losses in HTS coils for high-frequency and non-sinusoidal currents

B.J.H. de Bruyn, J.W. Jansen, E.A. Lomonova

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Abstract

AC losses in racetrack coils that are wound of YBCO tapes are measured for sinusoidal and non-sinusoidal transport currents with fundamental frequencies up to 1 kHz. An electrical method to measure losses for non-sinusoidal currents is developed for this purpose. The measured losses are compared to the losses calculated by 2D finite element models with power-law material models. The frequency and waveform-dependency of the measured losses are shown and compared to the results of the models over a wide range of frequencies and waveforms. Finally, it is shown that the finite element models can accurately predict AC losses resulting from non-sinusoidal transport currents as are present in highly dynamic motors with AC armature coils.

Original language	English
Article number	095006
Number of pages	8
Journal	Superconductor Science and Technology
Volume	30
Issue number	9
DOIs	https://doi.org/10.1088/1361-6668/aa7c74
Publication status	Published - Sept 2017

Keywords

AC losses
finite element analysis
loss measurement
superconducting coils
type-II superconductors

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10.1088/1361-6668/aa7c74

AC Losses in HTS Coils_BJH_de_BruynFinal author version , 388 KB

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title = "AC losses in HTS coils for high-frequency and non-sinusoidal currents",

abstract = "AC losses in racetrack coils that are wound of YBCO tapes are measured for sinusoidal and non-sinusoidal transport currents with fundamental frequencies up to 1 kHz. An electrical method to measure losses for non-sinusoidal currents is developed for this purpose. The measured losses are compared to the losses calculated by 2D finite element models with power-law material models. The frequency and waveform-dependency of the measured losses are shown and compared to the results of the models over a wide range of frequencies and waveforms. Finally, it is shown that the finite element models can accurately predict AC losses resulting from non-sinusoidal transport currents as are present in highly dynamic motors with AC armature coils.",

keywords = "AC losses, finite element analysis, loss measurement, superconducting coils, type-II superconductors",

author = "{de Bruyn}, B.J.H. and J.W. Jansen and E.A. Lomonova",

year = "2017",

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language = "English",

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T1 - AC losses in HTS coils for high-frequency and non-sinusoidal currents

AU - de Bruyn, B.J.H.

AU - Jansen, J.W.

AU - Lomonova, E.A.

PY - 2017/9

Y1 - 2017/9

N2 - AC losses in racetrack coils that are wound of YBCO tapes are measured for sinusoidal and non-sinusoidal transport currents with fundamental frequencies up to 1 kHz. An electrical method to measure losses for non-sinusoidal currents is developed for this purpose. The measured losses are compared to the losses calculated by 2D finite element models with power-law material models. The frequency and waveform-dependency of the measured losses are shown and compared to the results of the models over a wide range of frequencies and waveforms. Finally, it is shown that the finite element models can accurately predict AC losses resulting from non-sinusoidal transport currents as are present in highly dynamic motors with AC armature coils.

AB - AC losses in racetrack coils that are wound of YBCO tapes are measured for sinusoidal and non-sinusoidal transport currents with fundamental frequencies up to 1 kHz. An electrical method to measure losses for non-sinusoidal currents is developed for this purpose. The measured losses are compared to the losses calculated by 2D finite element models with power-law material models. The frequency and waveform-dependency of the measured losses are shown and compared to the results of the models over a wide range of frequencies and waveforms. Finally, it is shown that the finite element models can accurately predict AC losses resulting from non-sinusoidal transport currents as are present in highly dynamic motors with AC armature coils.

KW - AC losses

KW - finite element analysis

KW - loss measurement

KW - superconducting coils

KW - type-II superconductors

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U2 - 10.1088/1361-6668/aa7c74

DO - 10.1088/1361-6668/aa7c74

M3 - Article

SN - 0953-2048

VL - 30

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 9

M1 - 095006

ER -

AC losses in HTS coils for high-frequency and non-sinusoidal currents

Abstract

Keywords

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