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Browse Journals & Magazines > American Institute of Electri ...> Volume:74 Issue:1 Help

An eddy-current braking crane-hoist controller with variable brake excitation

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1 Author(s)
Rathbun, H. J. ; The Electric Controller and Manufacturing Company, Cleveland, Ohio

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.

Published in:
American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the  (Volume:74 ,  Issue: 1 )

Date of Publication: March 1955

Page(s):
56 - 61
ISSN :
0097-2185
Digital Object Identifier :
10.1109/TAI.1955.6371471
Product Type:
Journals & Magazines
Date of Current Version :
10 December 2012
Issue Date :
March 1955

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