NDLI: Alternator power conditioning for launchers

Content Provider	IEEE Xplore Digital Library
Author	Singh, H. Eccleshall, D. McNab, I. Pappas, J.
Copyright Year	1998
Description	Author affiliation: AMSRL-WM-TE, Army Res. Lab., Aberdeen Proving Ground, MD, USA (Singh, H.)
Abstract	A high-energy pulse-discharge is needed to drive an electromagnetic (EM) or an electrothermal-chemical (ETC) launcher. Various pulse power generators have been examined and used. Capacitor-based power supplies are convenient for laboratory launchers, but supplies based on rotating machines-alternators and homopolar generators-are generally more weight efficient and practical for storing, generating and shaping pulses for multi-shot, fieldable launchers. Alternators are the most flexible of the rotating machines, are better matched to the variable impedance of the launcher and avoid the use of opening switches which are difficult to implement for repetitive and reliable operation. Also, a single pulse generator can be used to power several lethality and survivability platforms. Several alternator configurations are possible, each involving different pole geometries, numbers of poles and output phases. These configurations are in turn associated with a power converter system. The switch requirements can be met for small-caliber EM railguns and for ETC guns of all caliber by near-term silicon thyristors. For large caliber EM railguns, triggered vacuum switches are viable, although they may have to be augmented with diodes or other devices to ensure their recovery after each cycle. In the long term, thyristors based on silicon carbide offer the most promise for all applications because they can operate at 3 to 5 times the current density and electric field intensity of silicon devices.
Starting Page	38
Ending Page	41
File Size	537394
Page Count	4
File Format	PDF
ISBN	0780342445
ISSN	10768467
DOI	10.1109/MODSYM.1998.741187
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Alternators Power conditioning Pulsed power supplies Pulse generation Switches Power generation Railguns Thyristors EMP radiation effects Electromagnetic launching
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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