pose of the experimental results here is to verify the results obtained from equation 21(B) from which the gain and time con stant are obtained. Figs. 13 through 15 compare calculated and experimental re sults and show reasonable agreement be tween steady-state gain characteristics. In large signal applications the magneticamplifier transfer function must be sup plemented by limiting in order to represent the full and minimum output conditions.The oscillograms of Figs. 16 and 17 verify the validity of the theoretical ex pression for time constant.
ConclusionsThe dynamic operation of the magnetic amplifier may be described by an output difference equation which contains realis tic approximations of real-core and rectifier functions. The nonlinear differ ence equation may be linearized in order to obtain a useful transfer function in operational form. The results predicted by the operational transfer function may be verified experimentally for a range of values of control-circuit resistance and rectifier back resistance. are with the Bonneville Power Administration, Portland, Oreg.; S. E. BENSON is with the Philco Corpora tion, Philadelphia, Pa.
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