Computer simulation is used to investigate the transient performance of induction-type coilguns as a function of the dimensions, material properties, type of supply, firing sequence of switching elements, and connections of drive coils. The performance of both generator-driven and capacitor-driven coilguns is addressed. It is shown that the generator-driven coilgun performs satisfactorily in the starting section. However, at high velocity, the transit time is close to the electrical transient time constant, and therefore the DC components produce a retarding force. To avoid this problem, the three phase voltages should not be switched on simultaneously, but rather phase-by-phase according to their zero current crossing points. This can also alleviate the problem in the transient between the sections. The capacitor-driven coilguns, instead, derive the alternating current needed to create a traveling wave from resonance with the inductance of the coils. Therefore, the initiation of the sinusoidal current oscillation coincides with the switch-on time. They are ideally suited for short-time, high-acceleration operation, but they are likely to require higher operating voltages than the generator-driven coilguns, because of the constraint imposed on the capacitance by the resonance condition with attenuation
Transient performance of linear induction launchers fed by generators and by capacitor banks
Betriebsverhalten einer Abschußvorrichtung mit induktiver Beschleunigung bei Versorgung aus einem elektrischen Generator und einer Kondensatorbatterie
1991
6 Seiten, 9 Quellen
Article (Journal)
English
ASYNCHRONGENERATOR , DIGITALSIMULATION , LEISTUNGSKONDENSATOR , IMPULSGENERATOR , SCHALTEN , KONDENSATORBATTERIE , RESONANZ , INDUKTIONSFLUSS , SCHALTZEIT , INDUKTIONSSPULE , BESCHLEUNIGUNG , GESCHOSS (MUNITION) , BALLISTIK , WEHRTECHNIK , RECHNERSIMULATION , STROMVERSORGUNG , IMPULSBETRIEB , IMPULSFOLGEFREQUENZ , GENERATOR (ELEKTRISCHE MASCHINE) , RECHNERUNTERSTUETZTE ENERGIETECHNIK , TRANSIENTE , START , PULSED POWER TECHNOLOGY
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