초록 ▼

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 fl

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.

대표청구항 ▼

1. A device comprising an electrical coil formed about an axis and having a plurality of turns; said coil having a first end and a second end; first means for causing a magnetic flux to flow through said coil along said axis; second means for causing said magnetic flux to pulse for a short duration

1. A device comprising an electrical coil formed about an axis and having a plurality of turns; said coil having a first end and a second end; first means for causing a magnetic flux to flow through said coil along said axis; second means for causing said magnetic flux to pulse for a short duration of time; and third means for causing the turns of said coil to be shorted out one-by-one during the duration of time said magnetic field is pulsed. 2. A device as set forth in claim 1 wherein said turns are shorted out one-by-one from the first end of the coil toward the second end of the coil; and output terminals connected between the second end of said coil and said third means. 3. A device as set forth in claim 1 wherein said second and third means comprise an electrically conducting tube positioned spacially inside said coil; said tube having a first and second end aligned with said first and second end of said coil; and fourth means inside of said conducting tube for causing said tube to rapidly expand towards and make contact with the turns of said coil from said first end progressively on down to said second end said coil, thereby causing the shorting of said turns by the contact of said conducting tube and the turns of said coil. 4. A device as set forth in claim 3 wherein said fourth means is an explosive charge located inside said tube; and said explosive charge being ignited at the first end of said tube so that the explosive charge will cause the expansion of said tube towards said coils from the first end towards the second end as an explosive wave travels from said first end to said second end of said tube. 5. A system as set forth in claim 4 further comprising output terminals connected between said second end of said coil and said second end of said tube. 6. A device as set forth in claim 5 wherein said first means is a cylindrical permanent magnet located about said coil 7. A device as set forth in claim 6 further comprising an insulating casing located outside and adjacent to said coil so as to allow said tube when expanded to make firm contact with the turns of said coil.