NDLI: Distributed-current-feed and distributed-energy-store railguns

Content Provider	IEEE Xplore Digital Library
Author	Holland, L.
Copyright Year	1965
Abstract	Distributed-type railguns are combinations of power supplies and railguns designed to maintain a nearly constant current in the armature of a railgun and to overcome the accelerator length limitations of simple breech-fed railguns. This limitation arises from the increasing resistance and inductance of the rails with increasing railgun length. The energy efficiency of a railgun system from the primary energy store to the kinetic energy of the projectile can be improved as compared to the simple railgun in some applications. This is accomplished by a reduction of the stored magnetic field energy in the bore of the railgun at the end of a shot and reduction of the resistive losses in the rails. The improved system performance of the distributed railguns over the simple breech-fed railguns is achieved at the expense of greater system complexity. The only distributed-type railguns that have been built to date are distributed-energy-store (DES) railguns. These systems presently use capacitors as the primary energy store, which allows the use of closing switches to initiate current from each of the stores. In this paper a new type of railgun, the distributed-current-feed (DCF) railgun, is presented. The DCF railgun system is a compromise in system complexity and efficiency between the DES railguns and the simple breech-fed railguns. Also, the DCF railgun utilizes closing switches in such a manner as to allow the use of a variety of primary power supplies, including homopolar generators (HPGs), for such electromagnetic propulsion tasks as space launches.
Sponsorship	IEEE Magnetics Society
Starting Page	272
Ending Page	275
Page Count	4
File Size	377506
File Format	PDF
ISSN	00189464
Volume Number	20
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1984-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Railguns Power supplies Rails Switches Inductance Energy efficiency Kinetic energy Projectiles Magnetic fields Boring
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

The distributed energy store railgun, its efficiency, and its energy store implications

Development of a high-energy distributed energy source electromagnetic railgun with improved energy conversion efficiency

Experimental measurement of railgun performance

Feasibility of a railgun energy recovery circuit

Current flow patterns in railgun rails

Distributed energy store (DES) railgun development

Multi-rail barrel design and performance

Achieving high efficiency with conventional railgun launchers

The STAR railgun concept

Distributed-current-feed and distributed-energy-store railguns

Similar Documents

The distributed energy store railgun, its efficiency, and its energy store implications

Development of a high-energy distributed energy source electromagnetic railgun with improved energy conversion efficiency

Experimental measurement of railgun performance

Feasibility of a railgun energy recovery circuit

Current flow patterns in railgun rails

Distributed energy store (DES) railgun development

Multi-rail barrel design and performance

Achieving high efficiency with conventional railgun launchers

The STAR railgun concept

Distributed-current-feed and distributed-energy-store railguns