IDENTIFICATION OF NONLINEAR PARAMETERS OF ROTOR’S IN THE EQUIVALENT CIRCUIT OF INDUCTION MOTOR WITH USE OF ENERGY STORAGES
Journal Title: Електромеханічні і енергозберігаючі системи - Year 2017, Vol 1, Issue 37
Abstract
Purpose. Substantiation of the possibility of identification of nonlinear parameters of the equivalent circuit of induction motor using energy storage devices. Methodology. The article proposes an approach to determining motor’s parameters taking into account the effect of current displacement in the rotor in the form of the dependence of the rotor's resistance on the current. To determine the parameters of induction motors, it is proposed to use the energy method, in accordance with which a system of identification equations of the balance of instantaneous power components is compiled. The system of identification equations is formed in accordance with the adopted equivalent circuit, which takes into account the dependence of the rotor's resistance on the rotor’s current. Results. It is shown that the proposed approach allows identifying electromagnetic parameters of induction motor with sufficient accuracy, taking into account the effect of current displacement in the rotor. The researches carried out by the authors of the efficiency of the energy method in the identification of EMP of IM showed that with the help of this method it is possible to determine resistance of the rotor at an angular velocity equal to zero. An increase in the stator current under these conditions leads to an increase in the rotor current, and, accordingly, to increase in the rotor’s resistance. Studies installed expediency identification of EMP of IM with taking into account effect of current displacement when supplying by decaying signal of DC voltage on the stator winding and followed harmonic analysis of the current and voltage, determining an actual value of the rotor’s resistance. Originality. The article suggests a variant of obtaining the necessary harmonic composition of the voltage and current signals when the induction motor is powered by energy storage devices. Practical value. Increase time between failures of repaired engines and improve their energy characteristics when operating in accordance with new passport data and permissible load values.
Authors and Affiliations
Dmytro Yosypovych Rodkin, Iurii Romashykhin, Myikita Rudenko
Keywords
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