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Experimental Investigations of State-of-the-Art 650-V Class Power MOSFETs for Cryogenic Power Conversion at 77K | IEEE Journals & Magazine | IEEE Xplore

Experimental Investigations of State-of-the-Art 650-V Class Power MOSFETs for Cryogenic Power Conversion at 77K


Abstract:

With consideration of both the operating properties from cryogenic MOSFETs and refrigerating costs from cryogenic refrigerators, this paper attempts to carry out the expe...Show More

Abstract:

With consideration of both the operating properties from cryogenic MOSFETs and refrigerating costs from cryogenic refrigerators, this paper attempts to carry out the experimental tests and performance evaluations of state-of-the-art 650-V class MOSFETs, and thus to explore a possible design guideline for cryogenic power conversions at liquid nitrogen temperature. Three cryogenic operating behaviors of on-state resistances and breakdown voltages of five types of commercial power MOSFETs and on-state voltage across their built-in reverse diodes are tested from 300 K to 77 K. The measured on-state resistances obtained in low-current tests show almost double-exponential functional relations with the operating temperatures, while the other two cryogenic parameters are directly or inversely proportional to the operating temperatures. Moreover, cryogenic on-state resistance behaviors in high-current tests from 20 A to 90 A are also found to have double-exponential functional relations with the operating currents. Based on the experimental results and their fitted temperature-dependent and current-dependent functions, integrated evaluation of overall energy efficiency involved with refrigerating cost is presented to form a feasible design guideline for cryogenic power conversions. Finally, two 40-kW and 4-MW boost choppers are conceptually designed and discussed to verify the proposed design guideline for the use in various MOSFET-based cryogenic power conversions.
Page(s): 8 - 18
Date of Publication: 10 October 2017
Electronic ISSN: 2168-6734

Funding Agency:


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