Accession Number : ADA138360

Title :   Repetitive Switching for an Electromagnetic Rail Gun.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Gruden,J M

PDF Url : ADA138360

Report Date : Dec 1983

Pagination or Media Count : 90

Abstract : Previous testing on a repetitive opening switch for inductive energy storage has proved the feasibility of the rotary switch concept. The concept consists of a rotating copper disk (rotor) with a pie-shaped insulator section and brushes which slide along each of the rotor surfaces. While on top of the copper surface, the brushes and rotor conduct current allowing the energy storage inductor to charge. When the brushes slide onto the insulator section, the current cannot pass through the rotor and is diverted into the load. This study investigates two new brush designs and a rotor modification designed to improve the current commutating capabilities of the switch. One brush design (fringe fiber) employs carbon fibers on the leading and trailing edge of the brush to increase the resistive commutating action as the switch opens and closes. The other brush design uses fingers to conduct current to the rotor surface, effectively increasing the number of brush contact points. The rotor modification was the placement of tungsten inserts at the copper-insulator interfaces.

Descriptors :   *Rotary switches, *Commutators, Electric guns, Power supplies, High power, Disks, Rotation, Electrical brushes, Copper, Graphite, Computerized simulation, Computer programs, Theses

Subject Categories : Electrical and Electronic Equipment
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE