TY - JOUR
T1 - Impact of Magnet Number on the DC Output of a Dynamo-Type HTS Flux Pump
AU - Zhou, Pengbo
AU - Ren, Gang
AU - Ainslie, Mark
AU - Ghabeli, Asef
AU - Zhang, Shuai
AU - Zhai, Yao
AU - Ma, Guangtong
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China (NNSFC) under Grant 52107010 and Grant 52037008, in part by the International Postdoctoral Exchange Fellowship Program Between Helmholtz and OCPC, in part by the Natural Science Foundation of Sichuan Province under Grant 2022NSFSC1891, and in part by the Research Funds of States Key Laboratory of Traction Power under Grant 2022TPL-T11.
Publisher Copyright:
© 2002-2011 IEEE.
PY - 2023/11/1
Y1 - 2023/11/1
N2 - The dynamo-type high-temperature superconducting (HTS) flux pump enables the injection of direct current (dc) into a closed-loop HTS coil. In this study, based on a two-dimensional segregated H-formulation finite-element method model, we numerically investigate the impact of the number of permanent magnets (PMs) mounted on the rotor on its performance. We find that the dc output voltage (VDC) does not always increase with increasing PM number as reported previously. More specifically, above a certain value, which is determined by the size of the PMs and the rotor, the dc output voltage no longer increases with the PMs number and tends to decrease continuously. With the further increase of the PM number, the dc output voltage will even disappear and then increase with the opposite polarity. We attribute the underlying mechanism of this phenomenon to the change in the profile of the magnetic field applied to the HTS stator when increasing the number of PMs. Specifically, there is an optimal value of the number of PMs to achieve the best performance, which will enable better design of such HTS dynamos in the future.
AB - The dynamo-type high-temperature superconducting (HTS) flux pump enables the injection of direct current (dc) into a closed-loop HTS coil. In this study, based on a two-dimensional segregated H-formulation finite-element method model, we numerically investigate the impact of the number of permanent magnets (PMs) mounted on the rotor on its performance. We find that the dc output voltage (VDC) does not always increase with increasing PM number as reported previously. More specifically, above a certain value, which is determined by the size of the PMs and the rotor, the dc output voltage no longer increases with the PMs number and tends to decrease continuously. With the further increase of the PM number, the dc output voltage will even disappear and then increase with the opposite polarity. We attribute the underlying mechanism of this phenomenon to the change in the profile of the magnetic field applied to the HTS stator when increasing the number of PMs. Specifically, there is an optimal value of the number of PMs to achieve the best performance, which will enable better design of such HTS dynamos in the future.
KW - HTS dynamo
KW - flux pump
KW - permanent magnets
KW - numerical modeling
KW - direct-current output voltage
UR - http://www.scopus.com/inward/record.url?scp=85166339563&partnerID=8YFLogxK
U2 - 10.1109/TASC.2023.3299601
DO - 10.1109/TASC.2023.3299601
M3 - Article
SN - 1051-8223
VL - 33
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 8
M1 - 4603509
ER -