DocumentCode
1371523
Title
An eddy-current braking crane-hoist controller with variable brake excitation
Author
Rathbun, H. J.
Author_Institution
The Electric Controller and Manufacturing Company, Cleveland, Ohio
Volume
74
Issue
1
fYear
1955
fDate
3/1/1955 12:00:00 AM
Firstpage
56
Lastpage
61
Abstract
An a-c crane-hoist controller for a wound-rotor induction motor and an eddy-current brake is described. The brake serves as an artificial load for the motor. Emphasis is placed on the desirability of using speed-responsive excitation for the brake to cause its torque to increase so rapidly with speed that flat speed-load characteristics are obtained. A magnetic amplifier responsive to a signal voltage taken from the secondary circuit of the motor is a simple and reliable means for controlling the brake excitation.
Keywords
Acceleration; Coils; Contacts; Resistance; Synchronous motors; Torque; Voltage control;
fLanguage
English
Journal_Title
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the
Publisher
ieee
ISSN
0097-2185
Type
jour
DOI
10.1109/TAI.1955.6371471
Filename
6371471
Link To Document