In the Wi Sy of increasing currents and energies of flux compression generators (FCG) by enlarging their dimensions one can face technical and technologic difficulties. They are caused by the growth of electric voltages in the magnetic flux compression volume as well as by the growth of magnetic field force effects on the design elements. Moreover, enlarging the FCG dimensions results in the increase of characteristic time of current rise in the load, that is extremely undesirable for many applications. Parallel and series connection of several FCG, that are simultaneously operating modules, is one of the ways to obtain high currents and energies. This paper describes the possibilities of parallel and series connection of helical FCG and coaxial FCG with axial HE-charge initiation and also presents the project of high-current power unit Sprut based on using the multielement disk generatorsmodules connected in parallel with the common load.
Helical FCGsHelical generators are attractive because of their efficient operation into large inductive and active loads under rather high output currents and energies and have a high energy gain. Therefore, they were widely and successfully used and will be used in the future.The known generator S-320' at the initial energy of -1.5 MJ in 0.1-0.5 pH loads provides the current of 12 MA having the peak power of -2.1011 W. In our experiments three S-320 generators Connected in parallel have been tested for their operation into load 30-60 nbl, wherein the current was as much as -45 MA. In this case each of S-320 generators was powered by its own generator C-160 having a transformer output. An optimum selection of transformer parameters provides a possibility of powering three MCG S-320 generators connected in parallel from one generator C-160.In a family of fast-operating helical FCGs the FCG-2402 is commonly known, which produces current pulses 10-15 MA with characteristic time 30-40 p. s of current rise in the loads 60-145 nH. The FCG-240 output power is (3-4).1011 W. A system of seven fast generators of FCG-240 type has been designed. This device is intended to power the high-power disk FCG being 1 m in diameter and having initial inductance -700 nH with the current 12 MA (energy -50 MJ). Powering of the 7-module helical FCG requires the initial energy -300 kJ. Those generators should be connected in parallel, if necessary. That provides total output current -80 MA.
ICoaxial FCGs with simultaneous axial HE-charge initiationGenerators of this type can produce currents of tens and hundreds of megaamperes at a high peak power3 and provide a highly-efficient HE energy conversion into magnetic energy. These generators capabilities of increasing the output energy and power due to the structure elongation are limited. The limitations are connected with the difficulties encountered in simultaneous axiial initiating of long HE-charges and preventing electric breakdown on the output insulator surface. Therefore, it makes sense to develop MCG-based high-energy systems using series-parallel...
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