HTS Pancake Coils Without Turn-to-Turn Insulation

By S. Hahn, D. Park, J. Bascuñân, Y. Iwasa. IEEE transactions on applied superconductivity, 2010

666 citations recorded by the source corpus.

This paper reports a study of HTS pancake coils without turn-to-turn insulation. Three no-insulation (NI) pancake coils were wound: each single and double pancake coil of Bi2223 conductor and one single pancake of ReBCO conductor. An equivalent electrical circuit for modeling NI coils was verified by two sets of test: 1) charge-discharge; and 2) sudden discharge. Also, an overcurrent test in which a current exceeding a coil's critical current by 2.3 times was performed, and analysed, to demonstrate that in terms of stability NI HTS coils outperform their counterparts. The new NI winding offers HTS coils enhanced performance in three key parameters: overall current density; thermal stability; and mechanical integrity.

Subfields: Biomedical Engineering, Condensed Matter Physics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/85f48d90012d3f032636390aab5c773ba4b36c12

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In Biomedical Engineering

1. D. Uglietti
2. Y. Yanagisawa
3. W. Chan
4. H. Maeda

In Condensed Matter Physics

1. D. Uglietti
2. Y. Yanagisawa
3. H. Maeda

In Electrical and Electronic Engineering

1. D. Uglietti
2. Y. Yanagisawa
3. W. Chan
4. H. Maeda

Citations in the corpus

• Self-protection mechanisms in no-insulation (RE)Ba2Cu3Ox high temperature superconductor pancake coils (2016, background): “some NI coils can be loaded with an overcurrent twice more than its critical current [5].”
• An equivalent circuit grid model for no-insulation HTS pancake coils (2015, neutral): “= + = + = V L I t I R I R I I I d d (1) coil coil s s s r r”
• 26 T 35 mm all-GdBa2Cu3O7–x multi-width no-insulation superconducting magnet (2016, methodology): “technique was introduced to enable an NI HTS magnet to be essentially self-protecting [19].”
• A Study on the No Insulation Winding Method of the HTS Coil (2012, methodology): “Since the NI winding technique enables a DC superconducting magnet more compact and operated more stable than its insulated counterpart, study on the NI winding method has been carried out in a few research groups [1], [2].”
• Recent Developments in High-Temperature Superconducting Magnet Technology (Review) (2014, background): “Uninsulated winding are effective in preventing thermal runaways [65].”
• A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors (2019, background): “proposed to wind HTS superconducting magnets (mainly double pancakes) with non-insulated tapes [186].”