| Title: |
MOSFET-based HTS flux pump |
| Authors: |
Jurčo, Róbert; Vaskuri, Anna; Curé, Benoit; Dudarev, Alexey; Mentink, Matthias |
| Contributors: |
CERN EP R&D |
| Source: |
Superconductor Science and Technology ; volume 36, issue 11, page 115025 ; ISSN 0953-2048 1361-6668 |
| Publisher Information: |
IOP Publishing |
| Publication Year: |
2023 |
| Description: |
We have developed a high-temperature superconducting (HTS) flux pump using high-power metal-oxide-semiconductor field-effect transistors (MOSFETs) for switching. For its primary coil, two commercial transformers are utilized, each consisting of two copper coils wound on a single iron core, which enables changing the load current over primary current ratio (101 or 194) between the primary and secondary coils. Full-wave rectification is achieved with two half-wave secondary circuits, each of them having six HTS one-turn coils to lower the resistance. Each secondary coil is composed out of nickel-reinforced BSCCO tapes, where 12 MOSFETs have been soldered in parallel straight to the tapes and controlled with analog electronics. Secondary coils are clamped to custom-made copper-stabilized HTS current leads. A support structure for keeping the HTS coils in place was 3D-printed using cryogenic-compatible composite material PETG-CF20. Resistances of the two secondary circuits were measured to be 4 μ Ω and 7 μ Ω at 77 K with a total critical current of 980 A. We successfully ramped up a 50 µ H Conductor on Round Core solenoid at 77 K using our HTS flux pump with 50 Hz AC voltage source. We achieved a maximal load current of 900 A and exceeded the 715 A critical current of the solenoid. During the thermal runaway of the magnet, the increased load voltage limits the maximum load current supplied by the flux pump. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| DOI: |
10.1088/1361-6668/acfbfc |
| DOI: |
10.1088/1361-6668/acfbfc/pdf |
| Availability: |
https://doi.org/10.1088/1361-6668/acfbfc; https://iopscience.iop.org/article/10.1088/1361-6668/acfbfc; https://iopscience.iop.org/article/10.1088/1361-6668/acfbfc/pdf |
| Rights: |
http://creativecommons.org/licenses/by/4.0 ; https://iopscience.iop.org/info/page/text-and-data-mining |
| Accession Number: |
edsbas.414B657D |
| Database: |
BASE |