Physical constraints at design of a high current inductor

A. V. Kharlov, B. M. Kovalchuk, E. V. Kumpyak, G. V. Smorudov, N. V. Tsoy

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    High voltage, high current inductors are required for many high pulsed power systems, incorporating capacitor banks. Those inductors simultaneously serve both as a pulse shaping and protection element in R-L-C circuits. A 25 kV/70 kA protection inductor on inductance of 1 mH with low stray field was designed, manufactured, and tested. It was designed as a quasi-toroidal system, consisting of four coils (with 0.25 mH inductance each) evenly distributed in the perimeter of a square. The structure of coils was optimized to withstand a huge electromagnetic force produced by a 70 kA current. The 0.25 mH coil is made as multi-layer solenoid (six layers) from a copper wire (6 × 4 mm 2 net cross-section) with fiberglass insulation. Layers are connected in parallel in order to decrease active resistance of the coil. This 0.25 mH coil was tested at 70 kA peak current with a pulse length of about 20 ms, which corresponds to the action integral at about 32 × 106 A 2s. Maximum magnetic field inside the coil is about 12 T. A finite element analysis with the ELCUT software was used to calculate the magnetic field, temperature rise, and stresses in the protection inductor. The typical maximum stresses in our design are 100 MPa in copper coils and 140 MPa in fiberglass body tubes; these are both below the yield strength for these materials. Simulations results are compared with the experimental tests and good agreement is observed.

    Original languageEnglish
    Pages (from-to)471-476
    Number of pages6
    JournalLaser and Particle Beams
    Volume32
    Issue number3
    DOIs
    Publication statusPublished - 1 Jan 2014

    Fingerprint

    inductors
    Inductance
    high current
    coils
    Magnetic fields
    Copper
    Pulse shaping
    Solenoids
    Yield stress
    Insulation
    Capacitors
    Wire
    Finite element method
    glass fibers
    Networks (circuits)
    inductance
    Electric potential
    copper
    Temperature
    yield strength

    Keywords

    • Keywords Capacitor bank
    • Low stray field
    • Protection inductor
    • Toroidal coil

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

    Cite this

    Kharlov, A. V., Kovalchuk, B. M., Kumpyak, E. V., Smorudov, G. V., & Tsoy, N. V. (2014). Physical constraints at design of a high current inductor. Laser and Particle Beams, 32(3), 471-476. https://doi.org/10.1017/S0263034614000408

    Physical constraints at design of a high current inductor. / Kharlov, A. V.; Kovalchuk, B. M.; Kumpyak, E. V.; Smorudov, G. V.; Tsoy, N. V.

    In: Laser and Particle Beams, Vol. 32, No. 3, 01.01.2014, p. 471-476.

    Research output: Contribution to journalArticle

    Kharlov, AV, Kovalchuk, BM, Kumpyak, EV, Smorudov, GV & Tsoy, NV 2014, 'Physical constraints at design of a high current inductor', Laser and Particle Beams, vol. 32, no. 3, pp. 471-476. https://doi.org/10.1017/S0263034614000408
    Kharlov AV, Kovalchuk BM, Kumpyak EV, Smorudov GV, Tsoy NV. Physical constraints at design of a high current inductor. Laser and Particle Beams. 2014 Jan 1;32(3):471-476. https://doi.org/10.1017/S0263034614000408
    Kharlov, A. V. ; Kovalchuk, B. M. ; Kumpyak, E. V. ; Smorudov, G. V. ; Tsoy, N. V. / Physical constraints at design of a high current inductor. In: Laser and Particle Beams. 2014 ; Vol. 32, No. 3. pp. 471-476.
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