Modeling and measurement of the voltage signal in HTS flux pumps
Authors/Creators
- 1. Institute of Electrical Engineering, Slovak Academy of Sciences
Description
High-temperature superconductor (HTS) flux pumps can be proper alternatives to energize HTS magnets or rotor windings in electrical motors and generators. They perform in a contact-less way avoiding brushes, as well as inefficient current leads and their cryogenic problems. In this work, the performance of dynamo-type HTS flux pump is investigated in detail via numerical modeling based on MEMEP [1], paying special attention to the voltage signal. We assume an E-J power law relation and magnetic field-dependent critical current density Jc(B). We study the cases of open circuit, close circuit and connection to a coil with large inductance. We also build a demonstrator to experimentally benchmark the modeling showing good agreement. We found that Jc does not play a major role in the open-circuit voltage but Jc(B) is key for the pump performance. In conclusion, MEMEP is suitable to model flux pumps, enabling optimization and proof-of-concept tests.
Files
EUCAS 2019_Flux pump airgap.pdf
Files
(5.1 MB)
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Additional details
Related works
- Is derived from
- Preprint: arXiv:1909.12157 (arXiv)
References
- R. Mataira, M. Ainslie, R. Badcock, and C. Bumby, "Origin of the dc output voltage from a high-tc superconducting dynamo," Applied Physics Letters, vol. 114, no. 16, p. 162601, 2019.
- C. Bumby, Z. Jiang, J. Storey, A. Pantoja, and R. Badcock, "Anomalous open-circuit voltage from a high-t c superconducting dynamo," Applied Physics Letters, vol. 108, no. 12, p. 122601, 2016.