Abstract
The present paper introduces an analytical study about the static characteristics of electromechanical control systems, containing a relay element as a controller. Such relay element initiates a sliding mode inside the system. An analytical study about the correlation between the frequency of oscillations of the sliding regime and the static characteristics of the electromechanical system is introduced. The electromechanical System under consideration consists of an armature controlled d.c. motor, fed through a thyristor convertor, Results of analytical study illustrated that decreasing the oscillations frequency of the sliding regime insures a high quality static characteristic of the system.
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