Ordnance – Accelerating
Patent
1984-07-05
1986-11-04
Brown, David H.
Ordnance
Accelerating
307106, 310 10, H02K 100, G21B 100
Patent
active
H00001481
ABSTRACT:
An explosively operated device by which a strong magnetic field pulse and an electric current pulse of microseconds duration is produced. A cylindrical magnet is used to initiate the field, and its energy source is an explosive filled metal tube. Within the converter itself, the lines of magnetic flux are essentially axial. When an explosive charge in the central tube is detonated, the end of the tube flares radially, and the tube begins to expand along its length. As it does so, the tube compresses the magnetic field against the inner surface of a magnet. Simultaneously, a helical coil inside the converter experiences a rapid increase in flux density, thus satisfying Faraday's law. This interaction causes a pulse of electric current to be fed into the turns of the magnetocumulative generator as its initial magnetic field is maximized. As the central tube expands against the inside of the coil, it shorts out the turns one-by-one as the detonation wave travels axially along the converter. This action progressively reduces the inductance of the circuit, thus increasing the current output of the converter.
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R. S. Caird et al, "Explosive Magnetic Flux Compression Plate Generators as ast High-Energy Power Sources", IEEE Conf., Lubbock, Tex. (11/11/76), 6 pages.
C. M. Fowler, "Explosive Flux Compression Generators for Rail Gun Power Sources", IEEE Transactions on Magnetics, vol. 18 No. 1, Jan. 82, pp. 64-67.
Brown David H.
Bush Fred M.
Griffiths John E.
Lane Anthony T.
Sims Robert C.
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