Open AccessExperimental study of the VFD’s speed stabilization efficiency under torque disturbances
Author(s) -
Vladimir L. Kodkin,
A. S. Anikin
Publication year - 2021
Publication title -
international journal of power electronics and drive systems/international journal of electrical and computer engineering
Language(s) - English
Resource type - Journals
eISSN - 2722-2578
pISSN - 2722-256X
DOI - 10.11591/ijpeds.v12.i1.pp80-87
Subject(s) - control theory (sociology) , stator , torque , direct torque control , vector control , voltage , variable frequency drive , computer science , nonlinear system , induction motor , transfer function , scalar (mathematics) , physics , mathematics , engineering , control (management) , power (physics) , electrical engineering , quantum mechanics , artificial intelligence , thermodynamics , geometry
The article presents a technique for experimental research of variable frequency drives experiencing periodic torque disturbances of variable frequency. The technique is based on the nonlinear transfer function of a link of an asynchronous electric motor, which forms an electromagnetic torque, proposed in previously published articles. The dependence of the transfer function on the frequency of the stator voltage and slip determines the research methodology. Experiments have shown the advantage of the dynamic characteristics of a drive with a positive feedback on the stator current over electric drives with traditional control methods (vector and scalar sensorless), and in terms of dynamic characteristics they also exceed drives with a vector control closed in motor speed. These advantages are retained when the frequency of change of the disturbing torque is changed from 0 to 5 Hz.