WB-P-3

AC loss simulation in an HTS inductor filter of power electronic inverters and converters

16:45-18:15　29/11/2023

*Yueming Sun1, Aaron Wadsworth2, Matthew G. S. Pearce2, Duleepa J. Thrimawithana2, Rodney A. Badcock1, *Zhenan Jiang1
[1] Paihau-Robinson Research Institute, Victoria University of Wellington, Wellington 6140, New Zealand
[2] Department of Electrical, Computer, and Software Engineering, University of Auckland, Auckland, 1010, New Zealand
Abstract Body

Recently, cryogenically cooled power electronic inverters/converters (PEIV/PEC) are developed to drive high temperature superconducting (HTS) motors in electrical aircraft applications.  To effectively improve the power efficiency and reduce the volume of the PEIV/PEC, HTS inductors may be good candidates for replacing the conventional copper inductors for filtering the electromagnetic interface (EMI) [1-3].  However, the high frequency (kHz-class) ripple currents present in PEIV/PEC may cause large AC loss in HTS inductor because AC loss of superconductors is proportional to the operating frequency. The parasitic heat from AC loss may lower the efficiency of the HTS inductors or even damage the HTS inductors. Hence, AC loss in HTS inductor filter becomes a critical issue when designing and optimizing the PEIV/PEC.

In this work, an HTS inductor was conducted for a buck converter, which is a 40-turn HTS double pancake coil wounded from 4.0 mm-wide SuNam wire (HCN04200). AC loss in the HTS inductor of was numerically calculated when it carries sinusoidal and triangular AC currents with a DC offset.  The frequency of AC currents ranges from 25 kHz to 100 kHz with amplitudes up to 20 A.  The AC loss behaviours of the HTS inductor were analysed while considering the thermal effect.

References

[1] Dezhin, D. S., R. I. Ilyasov, and K. L. Kovalev. "HTS inductor electric machine with combined excitation." In IOP Conference Series: Earth and Environmental Science, vol. 194, no. 5, p. 052007, 2018
[2] Chen, Xiao Yuan, Jian Xun Jin, Mian Gang Tang, Juan Feng, Hong Yan Luo, Lin Yu Li, Qiang Xu, and Hui Lin Zou. "An efficient boost chopper integrated with cryogenic MOSFETs and HTS inductor." IEEE Transactions on Applied Superconductivity 26, no. 7 (2016): 1-6.
[3] Jin, J. X., S. X. Dou, F. Darmann, M. Apperley, and T. Beales. "Development of an HTS inductor for an electronic high voltage generator." Physica C: Superconductivity 341 (2000): 1601-1602.

Acknowledgment

This work was supported by the New Zealand Ministry of Business, Innovation and Employment under the Advanced Energy Technology Platform program “High power electric motors for large scale transport” contract number RTVU2004.