Refined calculation of induction motor equivalent circuit nonlinear parameters by an energy method
DOI:
https://doi.org/10.15587/1729-4061.2017.104146Keywords:
induction motor, energy method, equivalent circuit, nonlinear electromagnetic parametersAbstract
The topicality of the research aim is caused by the analysis of the processes of energy conversion taking into account the induction motor particular nonlinearities that reveal the physical properties and phenomena in structural materials under the action of electrical and electromagnetic impacts. Taking into consideration the nonlinearities of the induction motor equivalent circuit influences the accuracy of determination of the electric machine operating characteristics. Most conventional methods for parameter identification do not enable assessment of the induction motor nonlinear characteristics and properties.
It is proposed to use resistive impedance and inductance dependences on the rotor current to take into account the rotor nonlinear parameters. To form identification equations, the instantaneous power components for the rotor nonlinear resistive impedance and nonlinear inductance have been obtained. The solution of the identification equations resulted in determination of the equivalent circuit electromagnetic parameters taking into account the rotor nonlinear parameters and the amplitudes of the harmonics of the current cosine and sine components of the rotor and magnetization circuit. The results of identification of the induction motor equivalent circuit parameters taking into account the rotor nonlinear parameters have been obtained with sufficient accuracy. This is confirmed by a low error of determination of the electromagnetic parameters. The adequacy of the identified parameters is determined by comparison of the stator current experimental and calculated curvesReferences
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Copyright (c) 2017 Mykhaylo Zagirnyak, Dmytro Rod'kin, Iurii Romashykhin, Zhanna Romashykhina, Anatoliy Nikolenko, Vitaliy Kuznetsov
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