A liquid nitrogen pool-cooled, coaxial energy storage inductor is being designed and built to provide a load for a prototype compact homopolar generator (HPG). This is part of a continuing effort to produce a compact field-portable electromagnetic accelerator power supply. Initial design parameters are that the coil store 3.1 MJ, representing a 50 percent transfer efficiency of energy stored in the HPG, with a transfer current of 1.0 MA. Coaxial conductor configurations are being investigated to eliminate high external magnetic fields, which have undesirable effects on nearby components. Also, coaxial inductors having a solid central conductor can withstand compressive magnetic loading at the inner radius of the material. This increases the achievable energy density, which is a function of the square of the magnetic flux density. The inductor will be made of aluminum and will be nested with the HPG in a low-resistance, compact configuration. Design and fabrication of the inductor are discussed. Fabrication of the inductor is scheduled to be completed during July 1983. Plans are to use the power supply to drive an 80-g tungsten projectile to 3 km/s. Based on test results, a second-generation high energy density HPG/inductor/opening switch power supply on a portable platform is planned. It is anticipated that the second-generation inductor will operate at higher energy density achieved by increasing the current density, number of turns, and stress levels.
Design of a compact inductor matched to a homopolar generator
Aufbau einer tiefgekuehlten, koaxialen Speicherspule fuer einen homopolaren Schwungradgenerator fuer militaerische Zwecke
Digest of Technical Papers. 4th IEEE Pulsed Power Conf. ; Jun ; 427-430
1983
4 Seiten, 8 Bilder, 1 Quelle
Conference paper
English
ARRADCOM/DARPA Compact homopolar generator
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