Pulse-width modulation in the autonomous voltage inverter in identifying parameters of the three-phase asynchronous motor

Georgii Vagapov,V.A Golenishchev-Kutuzov,Veronika Zagirova,Valery Makarov

doi:10.1051/e3sconf/202128801054

Georgii Vagapov, V.A Golenishchev-Kutuzov + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/202128801054

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Abstract

This paper deals with control algorithm of a two-level autonomous voltage inverter with pulsewidth modulation in forming test phase voltages for identification of parameters of a three-phase asynchronous motor. Necessary conversion is carried out, the laws of change of phase voltages of an autonomous inverter are obtained. The feasibility of using third order active Butterworth filters for determining first harmonics of phase voltages is shown. By means of computer simulation and experimental research, it is revealed that the required shapes of phase voltages can be implemented in a twolevel autonomous voltage inverter with pulse-width modulation, and the presence of Butterworth filters does not introduce significant distortion and allows to obtain necessary phase voltage shapes in the generalized electric machine.

Highlights

For implementation of laws of frequency regulation of speed in the asynchronous motor (AC), it is necessary to be armed with data on current parameter values of phase-substitution and load circuit
Analysis of the curve u1А(t) shows that phase voltages are amplitude-frequency modulated oscillations
Amplitude changes according to variations of voltage amplitude u1q (t), and frequency changes according to angular velocity variations 1(t)

Summary

Introduction

For implementation of laws of frequency regulation of speed in the asynchronous motor (AC), it is necessary to be armed with data on current parameter values of phase-substitution and load circuit. This information allows to implement more accurate algorithms of frequency regulation of speed. This provides energy efficiency and resource saving. In [6-13] efficiency of using continuous gradient method of minimum search of positive definite function for parametric identification of a three-phase asynchronous motor (AC) and its load is shown. In [7, 8, 11] identification is carried out by the five parametres of phase-substitution circuit of AC which include active winding resistance of stator R1 , winding inductance of stator L1 , mutual inductance M m

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