DOI 10.21440/2307-2091-2017-2-78-81 Publication Date 11.07.2017
Rotation speed regulator of the electric drive of the cone crusher pdf
V. M. Marasanov, G. P. Dyldin
The maximum value of the output and the power consumption, as well as the smallest size of the crushing products, one can achieve with a certain combination of the stroke, the angle of incline and the oscillation frequency of the mobile body of the crusher, and the size of its unloading slot. One way to improve the efficiency of the crushing process is to control the oscillation frequency of the mobile body of the crusher. The authors propose control algorithms for changing the rotation speed of the electric drive that can achieve it. There are three types of control algorithms for implementation. One can implement the algorithm of the first type by including in the algorithmic scheme a relay element that stepwise changes the control signal at the input of the intensity controller with the corresponding changes in the armature current. The intensity controller appears in the structure in order to convert the step changes of the control signal into smooth ones in accordance with the restrictions imposed on the current and the acceleration of the electric motor. The technical implementation of the algorithm of the second type, by using special devices that measure the dynamic component of the current by drive acceleration, solves the problem of separating the static component from the full current of the electric motor during the transition process of handling the corrected task, when the dynamic component of the current appears. In the algorithm of the third type, the authors use the time principle to isolate the static current for control circuits, namely, the control process is carried out in two stages. The first stage is the formation and storage of the correction of the control signal during the steady motion of the electric drive; the second stage - testing of the control signal (realization of the correction signal formed at the first stage). The control process in this case looks like a series of successive corrections. In accordance to the algorithm of the third type, the control device by structure is a PI-regulator with digital input.
Keywords: crusher; performance; fineness; oscillation frequency; control algorithm; regulator with digital input.
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