Cryogenic Evaluation of Nanocrystalline Cores Using Partial Cancellation

Wadsworth, Aaron; McKeown, Sean; Thrimawithana, Duleepa J.; Pearce, Matthew G. S.; Zhao, Lei; Li, Zongzhen; Neuburger, Martin

doi:10.1109/wpw54272.2022.9853904

Cited by 4 publications

(2 citation statements)

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“…The conventional two winding method is typically used to characterise core loss in magnetic cores [27]. In this method, the magnetic field strength (H) in a core under investigation is calculated by exciting a winding that has N 1 number of turns with a current i 1 (t) since,…”

Section: Inductorsmentioning

confidence: 99%

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GaN-based cryogenic temperature power electronics for superconducting motors in cryo-electric aircraft

Wadsworth

Thrimawithana

Zhao

et al. 2023

Supercond. Sci. Technol.

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Climate change has spurred a shift to electric transportation, but aviation faces challenges with electric energy storage and propulsion. Cryogenically cooled superconductingmotors, along with cryogenically cooled power electronics, offer a solution to increase the efficiency and power density of electric aircraft. This paper evaluates the feasibility of cryogenic power electronics by characterizing new technologies (GaN, nanocrystalline) using new experimental techniques. It is found that the on resistance reductions of GaN E-HEMTs at cryogenic temperatures depend on the maximum blocking voltage of the device, and the size of the gate resistor for ohmic p-GaN devices. Different types of nanocrystalline cores are shown to vary greatly in their behavior at cryogenic temperatures, which is measured using a modified core loss measurement circuit. Further analysis shows that the losses of a GaN based cryogenic inverter could potentially halve that of an equivalent Si based inverter

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Section: Inductorsmentioning

confidence: 99%

“…Another important point in the literature on cryogenic power electronics is the characterisation of inductor cores. In some work it was shown that ferrite [25,26] and nanocrystalline cores [25,27] have higher losses in liquid nitrogen (LN 2 ) (i.e. 77 K or −196 • C).…”

Section: Introductionmentioning

confidence: 99%