General Design of a 300-Kvar HTS Synchronous Condenser Prototype

Song, Peng; Shi, Zhao; Wu, Qihong; Yang, Ye; Luming, Zhang; Wu, Beimin; Song, Meng; Qu, Timing

doi:10.1109/tasc.2020.2989788

Cited by 15 publications

(1 citation statement)

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“…are advantageous due to their compact size and high power densities, which makes them very interesting for wind generators, marine propulsion motors, and Hyperloop (in its linear motor), among other [5,[7][8][9][10][11][12][13][14][15]. Other modern applications of such rotating machines are superconducting bearings of flywheel energy storage systems [16][17][18][19], and generator-shaped synchronous condensers [20,21]. HTS stacks and bulks can be used as powerful superconducting permanent magnets (or super-magnets) in the rotors of such motors [2,[22][23][24] or as rotor elements in variable reactance motors [6,25].…”

Section: Introductionmentioning

confidence: 99%

Reducing cross-field demagnetization of superconducting stacks by soldering in pairs

Dadhich¹,

Li²,

Solovyov³

et al. 2022

Supercond. Sci. Technol.

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Superconducting stacks can be used as strong permanent magnets in several applications. One of their uses is to build light and compact superconducting motors for aviation, where these magnets can be used in the rotor, but they can demagnetize quickly in the presence of cross fields. In this article, we propose a new configuration of soldered stacks face-to-face, which can be constructed by relatively simple joining techniques. Based on numerical modeling of cross-field demagnetization of stacks of 2 and 16 tapes, we show that such a sample can withstand around twice as high ripple field amplitudes than isolated stacks. The reason is the increase in the parallel penetration field by around a factor 2. For cross field amplitudes below this value, a soldered stack can retain higher permanent magnetization than isolated stacks. This way of reducing cross-field demagnetization does not decrease the power or torque rating of a motor, compared to other strategies like the increase in the gap between rotor and stator.

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