Accession Number : ADD011228

Title :   Shock Electromechanical Energy Converter with Permanent Magnet.

Descriptive Note : Patent Application,


Personal Author(s) : Thompson,J K

Report Date : 05 Jul 1984

Pagination or Media Count : 13

Abstract : An explosively operated device by which a strong magnetic field pulse and an electric current pulse of microseconds duration is produced. A cylindrical magneti is used to initiate the fields, 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 it length. As it does so, the tube compresses the magnetic field a gainst 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 magneto-cumulative generator as its initial mangetic 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. (Author)

Descriptors :   *Patent applications, *Permanent magnet generators, *Energy conversion, *Explosive charges, Magnetic fields, Electric current, Cylindrical bodies, Flux density

Subject Categories : Non-electrical Energy Conversion
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE