Higher harmonics in voltage on superconductor carrying AC current due to non-linear I–V curve

摘要: Abstract When superconducting wire carries AC current with amplitude exceeding its critical current, additional losses appear due to non-zero resistivity. The voltage attributed this mechanism will contain higher harmonics because of non-linear I–V curve material. This can be derived using the following simple model: parallel combination superconductor standing for properties all filaments and normal resistor representing matrix. relation is then characterized by three parameters: I0, n-exponent, n, ratio cross-section resistivity metallic Expressions Fourier coefficients have been calculated model. Extensive analysis influence that model parameters exhibit on revealed some useful features: 3rd harmonic could nicely used detect I0 while from maximum 5th value matrix estimated.