Ordnance – Accelerating
Patent
1984-08-06
1987-07-14
Kyle, Deborah L.
Ordnance
Accelerating
124 3, 310 12, F41F 102
Patent
active
046794840
ABSTRACT:
The electromagnetic projectile launching systems of this invention accelerate projectiles by switching current from a current source to a pair of conductive projectile launching rails such that current flows through the rails and through an armature between the rails to produce an accelerating force on a projectile and the rate of current injection into the rails is controlled so that the initial projectile acceleration occurs at a reduced current level compared to the current used for subsequent projectile acceleration. This reduced current level is provided by initially shorting a resistor connected between one of the rails and the power source or alternatively by inserting a resistor in series with a switch which partially commutates current from the current source to the projectile launching rails. The maximum rail surface temperature during a launch is reduced by controlling the rate of initial current injection.
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E. M. Honig, "Switching Considerations and New Transfer Circuits for Electromagnetic Launch Systems", IEEE Transactions on Magnetics, vol. 20, No. 2, Mar. 1984.
Griffiths John E.
Kyle Deborah L.
Lenart R. P.
Westinghouse Electric Corp.
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