Abstract： IEC 61788-8:2010 pdf free download.Superconductivity - Part 8: AC loss measurements - Total AC loss measurement of round superconducting wires exposed to a transverse alternating magnetic fieldat liquid helium temperature by a pickup coil m...

IEC 61788-8:2010 pdf free download.Superconductivity - Part 8: AC loss measurements - Total AC loss measurement of round

superconducting wires exposed to a transverse alternating magnetic fieldat liquid helium temperature by a pickup coil method.

7.1.3 Waveform of applied field

The standard waveform of the applied held shall be a sine waveform or a triangular waveform.

7.1.4 Frequency of applied field

The present method shall be used In the range of frequency up to the commercial levels of 50 Hz and 60 Hz to measure the total AC

loss. In the region of higher frequency, attentions shall be paid to reduce electromagnetic noise from metallic parts in the

vicinity of the pickup coils as shown in Annex A.

For the superconducting wires with fine filaments, the number of measurement points shall be more than five in an extensive range

of frequency on a logarithmic scale so as to calculate the coupling time constant from linear frequency dependence of the coupling loss as shown in 8.6. In the measurement of frequency dependence of AC losses, the amplitude of the applied held shall be fixed.

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