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How to calculate AC losses in HTS coils? 


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AC losses in HTS coils can be calculated using various methods. One approach is to measure the losses using a calorimetric approach, where the evaporated cryogen is collected and measured . Another method involves numerical modeling, where the AC losses are estimated based on the geometry and properties of the HTS coil . Additionally, experimental measurements can be conducted by integrating the products of resistive components extracted from terminal voltages and applied transport currents over a cycle . A novel method based on parameter identification has also been proposed, which measures AC loss by identifying the resistance and inductance of the HTS coil at any moment . These methods provide insights into the AC losses in HTS coils, allowing for a better understanding of their behavior and enabling the optimization of HTS applications.

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The paper proposes a novel AC loss measurement method for HTS coils based on parameter identification, which measures AC loss by identifying the resistance and inductance of the coils at any moment.
The paper provides a method to calculate AC losses in HTS coils by measuring the total losses, including Joule losses in the joints between the coils, and subtracting the Joule losses from the measured ones.
The paper provides a numerical model to calculate AC losses in HTS coils wound with different widths of HTS tapes. The reduction of AC loss becomes more significant with the decrease in tape width.
The paper discusses the calculation of AC losses in HTS coils by conducting charge-discharge tests with different ramp rates and supplying the windings with sinusoidal currents of different amplitude and frequency.
The paper does not provide a specific calculation method for AC losses in HTS coils.

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