Scientific paper ID 2134 : 2021/3

Ludmil Popov, Vasil Dimitrov

Tsypkin”s method was developed to determine both time constants of DC motors with independent excitation - mechanical TM (related to the inertia of rotating masses) and electromagnetic (function of inductance and resistance of the armature winding). For the purpose, only one output coordinate is determined - the current of the armature winding, as a carrier of information for both electromagnetic and mechanical processes in the object. The main limitation of the method is the ment for a single input impact. The accuracy in finding the mechanical time constant is low and it increases with decreasing sampling period t. In addition TM cannot be determined in real operation mode.

The modification of the method serves the purpose of shortening the time of the experiment by converting the expressions from the classical method. Thus, to determine Ta is enough to know the values of the currents from the beginning of the process until t = 4.t, whereas to determine TM the modification is reduced to the use of the expression for the mechanical time constant from the modified Suvorov method, as integration time in this case is 4.t. The performed simulation of the modified method with the Simulink module verifies it as a method for operative identification with a minimum experiment duration - 4.t, and significantly higher accuracy than the classical method.

постояннотоково електрозадвижване механична време-константа електромагнитна времеконстантаmechanical constant electromagnetic constantLudmil Popov Vasil Dimitrov


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