SYNTHESIS OF THE FREQUENCY CONTROL LAW BY MINIMUM OF STATOR CURRENT ON THE BASIS OF EQUATIONS FIELD ORIENTED MODEL ASYNCHRONOUS MACHINE

The article proposes and substantiates a method for studying the dynamics of an asynchronous electric drives with frequency control from the input side of the signal for setting the speed of rotation of the electric motor. In this method, a constant speed reference signal is added to a harmonic variable frequency signal. The set of amplitude changes and phase shifts of velocity oscillations are the initial data for identifying the dynamics of the studied control method. The logic of this method is determined by the previously obtained nonlinear transfer function of the link that forms the mechanical moment in the asynchronous electric drive with frequency control. Experiments have shown the dynamic benefits of the drive with positive stator current feedback.

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Forced dynamics control of an actuator with linear PMSM

Facta universitatis - series Electronics and Energetics ◽

10.2298/fuee0902183v ◽

2009 ◽

Vol 22 (2) ◽

pp. 183-195

Author(s):

Ján Vittek ◽

Vladimir Vavrús ◽

Jozef Buday ◽

Jozef Kuchta

Keyword(s):

Control System ◽

Control Method ◽

Sliding Mode ◽

Permanent Magnet Synchronous Motor ◽

Control Law ◽

Flux Vector ◽

Stator Current ◽

Current Vector ◽

Filtering Effect ◽

Speed Response

The paper presents design and verification of Forced Dynamics Control of an actuator with linear permanent magnet synchronous motor. This control method is a relatively new one and offers an accurate realization of a dynamic speed response, which can be selected for given application by the user. In addition to this, the angle between stator current vector and moving part flux vector is maintained mutually perpendicular as it is under conventional vector control. To achieve prescribed speed response derived control law requires estimation of an external force, which is obtained from the set of observers. The first observer works in pseudo-sliding mode and observes speed of moving part while the second one has filtering effect for elimination of the previous one chattering. The overall control system is verified by simulations and experimentally. Preliminary experiments confirmed that the moving part speed response follows the prescribed one fairly closely.

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Matrix structure of unified mathematical model of electric AC machines at control

E3S Web of Conferences ◽

10.1051/e3sconf/202020902023 ◽

2020 ◽

Vol 209 ◽

pp. 02023

Author(s):

Rauf Mustafayev ◽

Nurali Yusifbayli ◽

Laman Hasanova

Keyword(s):

Frequency Control ◽

Synchronous Machine ◽

Matrix Structure ◽

Asynchronous Machine ◽

Asynchronous Machines ◽

Squirrel Cage ◽

The Matrix ◽

Almost All ◽

Cage Rotor ◽

Derivatives Of

The matrix structure of the equations of a generalized electric alternating current machine is proposed, which, based on the Parke equations, is written in the coordinate axes of the machines rotating with the rotor speed. In the matrix structure, the column matrices of the derivatives of the stator, excitation and rotor windings are equal to the product of diagonal matrices consisting of the machine parameters and the column matrices of the flux links themselves and the sum of the matrix columns of the control parameters which are the matrix columns of the stator voltage, excitation voltage, and rotor voltage. It is shown that the matrix structure of a generalized controlled AC machine is transformed into mathematical models of almost all encountered AC electric machines, namely, into a synchronous machine with two excitation windings - a longitudinal and a transverse one; in a synchronous machine with a longitudinal field winding (classic); in an asynchronous machine with a squirrel-cage rotor; into an asynchronous machine with a phase rotor. It has been shown that the matrix structure includes the controls of these machines both from the stator and from the rotor. On the stator side for synchronous machines, it is a frequency control that regulates both the amplitude and frequency of the applied voltage, and on the rotor side, a constant voltage control is supplied to the longitudinal and transverse windings. For asynchronous machines, the stator and rotor are frequency-controlled. The following are examples of frequency control of an asynchronous machine both from the stator and from the rotor.

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Sensorless and energy-efficient PMSM drive for fan application

Archives of Electrical Engineering ◽

10.2478/aee-2013-0017 ◽

2013 ◽

Vol 62 (2) ◽

pp. 217-225 ◽

Cited By ~ 1

Author(s):

Stefan Brock ◽

Tomasz Pajchrowski

Keyword(s):

Energy Efficient ◽

Laboratory Tests ◽

Permanent Magnets ◽

Frequency Control ◽

Experimental Studies ◽

The Other ◽

Stator Current ◽

Current Vector ◽

New Criterion ◽

One Machine

Abstract The paper presents the problem of sensorless control of a permanent magnets synchronous motor (PMSM) without a damping cage for fan applications. Frequency control was used according to the principle of v/f = const. In order to reduce the power consumption of the drive system, the optimal voltage to the motor frequency characteristics was tested in the laboratory. The experimental studies was performed on a laboratory set of a drive consisting of two coupled PMSM machines, where one machine was supplied by a transistor inverter and the other was a passive load. A new criterion based on minimizing the module of stator current vector was proposed and an optimization algorithm in steady states was tested. The results of laboratory tests confirmed the validity of the applied solution for the fan drive.

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Analysis of Effiency of Work of Asynchronous Machine with a Shartcircuited Rotor at a Scalar Frequency Control

Elektrichestvo ◽

10.24160/0013-5380-2019-3-46-54 ◽

2019 ◽

Vol 3 (3) ◽

pp. 46-54

Author(s):

Lyaman Gasan gyzy GASANOVA ◽

◽

Rauf Ismail ogly MUSTAFAYEV ◽

Keyword(s):

Frequency Control ◽

Asynchronous Machine

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Application of the method of cluster analysis for formulation of the frequency-control law of an asynchronous motor

Russian Electrical Engineering ◽

10.3103/s106837121409003x ◽

2014 ◽

Vol 85 (9) ◽

pp. 581-585

Author(s):

I. Ya. Braslavskii ◽

A. V. Kostylev ◽

D. V. Esaulkova ◽

A. V. Kirillov

Keyword(s):

Cluster Analysis ◽

Frequency Control ◽

Asynchronous Motor ◽

Control Law

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Research on Induction Motor Vector Control System Based on Internal Model Decoupling

MATEC Web of Conferences ◽

10.1051/matecconf/201823204029 ◽

2018 ◽

Vol 232 ◽

pp. 04029

Author(s):

Hu-cheng He ◽

Wen-ting Wang ◽

Qun Zhu ◽

Lei Shi

Keyword(s):

Control System ◽

Vector Control ◽

Induction Motor ◽

Internal Model ◽

Frequency Control ◽

Internal Model Control ◽

Field Orientation ◽

Stator Current ◽

Model Control ◽

Vector Control System

As a high-performance variable frequency control technology, vector control has been widely used in the field of AC speed regulation. However, the cross-coupling potential of the induction motor after the vector transformation still affects the system performance. Therefore, the method is studied in which stator current is decoupled to excitation component and torque component using internal model control, and the internal model decoupling stator current controller is designed based on rotor field orientation. The simulation model of induction motor vector control system based on internal model decoupling is constructed with Matlab/Simulink. The simulation result shows that the internal model controller is superior to the traditional PI controller in disturbance-rejection performance and robustness.

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