METHODOLOGY OF INCREASING THE ACCURACY OF SPEED MEASURING BY TACHOGENERATORS

Vasil Dimitrov

Scientific paper ID 1510 : 2017/3

METHODOLOGY OF INCREASING THE ACCURACY OF SPEED MEASURING BY TACHOGENERATORS

Vasil Dimitrov

Various types of tachogenerators are used in many automatic speed regulation and control systems. The disadvantage of these devices is the non-linear dependence of the output voltage on the speed.

In this paper, a methodology for testing of tachogenerators and linearization of the Input / Output characteristic is proposed. Its goal is to determine the optimal value of the conversion factor and to minimize the speed measurement error. Tests of a synchronous tachogenerator have been performed – in addition to varying the output voltage, a frequency variation according to the rotational speed is also observed. The resulting I/O characteristics are shown and compared to the nominal (rated) ones. The corrected voltage and frequency conversion factors have been determined. Thus a linear characteristic (embedded in the control device) is maximum close to the real characteristics of the tachogenerator. Thus an experimental verification of the developed methodology has been performed.

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системи за автоматично управление тахогенератори методика за изпитанияAutomatic Control Systems Tachogenerators Methodology of TestingVasil Dimitrov

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