DocumentCode
1431504
Title
A magnetic amplifier frequency control
Author
Johnson, L. J. ; Schafer, H. G.
Author_Institution
Naval Research Laboratory, Washington, D. C.
Volume
69
Issue
5
fYear
1950
fDate
5/1/1950 12:00:00 AM
Firstpage
445
Lastpage
445
Abstract
TO SUPPLY power to certain types of shipboard instruments, a source of alternating current is required in which the frequency error must be ±0.1 per cent or less over a range of temperatures, loads, and supply voltages. This need has been met by the use of small motor-driven alternators which run on the ship´s d-c power supply. Frequency regulation is accomplished by shunt-field current control in the motor, and the field current is controlled by some form of servomechanism and frequency-sensing device.
Keywords
Frequency control; Magnetic circuits; Magnetic cores; Magnetic resonance; Magnetic separation; Magnetomechanical effects; Toroidal magnetic fields;
fLanguage
English
Journal_Title
Electrical Engineering
Publisher
ieee
ISSN
0095-9197
Type
jour
DOI
10.1109/EE.1950.6433858
Filename
6433858
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