Cold semiconducting converter, a compatibility device for a superconducting magnet

O.A. Chevtchenko, H.J.G. Krooshoop, M.A. Fedorovsky, H.H.J. ten Kate

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    A method to increase the efficiency of a power system for a superconducting (SC) magnet is presented. The system links a magnet and the mains (which serves as a power source and/or a load). It contains both room and low temperature electrical components.

    In order to reduce heat leaks, it is proposed to use a semiconducting converter unit located in the same cryostat and which is connected via high current leads to a magnet and via low current leads to the mains. In the standby mode the temperature of the unit is close to that of a magnet. While operating, the temperature of the unit will rise up to a level normally allowed for such components (~400 K for the switches). The efficiency of the proposed scheme is close to the conventional one which is based on a semiconducting power supply placed at room temperature in combination with retractable current leads.

    To demonstrate the approach, we developed such a converter. The performance of the converter unit is demonstrated while ramping a current of a small SC magnet operating at 4 K. Characteristic in- and output currents are 2 A and 300 A respectively. The unit standby temperature is measured to be ~40 K, while the operating temperature is about 300 K. Reasonable energy efficiency is demonstrated even at a low powering voltage.
    Original languageEnglish
    Title of host publicationAdvances in cryogenic engineering
    EditorsPeter Kittel
    Place of PublicationBoston, MA
    PublisherSpringer
    Pages1873-1880
    Number of pages8
    VolumePart A
    ISBN (Electronic)978-1-4613-0373-2
    ISBN (Print)978-1-4613-8022-1
    DOIs
    Publication statusPublished - 26 Sep 1996
    Event1995 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC - Columbus, United States
    Duration: 17 Jul 199521 Jul 1995

    Publication series

    NameCryogenic Engineering Conference Publication book series (ACRE)
    PublisherSpringer
    Volume41

    Conference

    Conference1995 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC/ICMC
    Abbreviated titleCEC/ICMC
    CountryUnited States
    CityColumbus
    Period17/07/9521/07/95

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  • Cite this

    Chevtchenko, O. A., Krooshoop, H. J. G., Fedorovsky, M. A., & ten Kate, H. H. J. (1996). Cold semiconducting converter, a compatibility device for a superconducting magnet. In P. Kittel (Ed.), Advances in cryogenic engineering (Vol. Part A, pp. 1873-1880). (Cryogenic Engineering Conference Publication book series (ACRE); Vol. 41). Boston, MA: Springer. https://doi.org/10.1007/978-1-4613-0373-2