THE THYRISTOR CONVERTER INFLUENCE ON THE PULSATIONS OF THE ELECTROMAGNETIC TORQUE OF THE INDUCTION MOTOR AT PARAMETRICAL CONTROL
Journal Title: Електротехніка і Електромеханіка - Year 2017, Vol 0, Issue 4
Abstract
Purpose. The purpose of the work is to identify the parameters influence of the electric motor, the power circuits elements of the converters, built on resistor-thyristor modules, the static torque and the moment of inertia of the mechanism on the vibrational components of the induction motor’s electromagnetic moment. Methodology. The methodological basis for the solution of the task is an integrated approach. The application of the generalized control circuit for an induction electric motor and its mathematical description made it possible to analyze various power circuits of parametric control of an induction electric motor. To create a common control algorithm, effectively use the computer for calculations. To perform qualitative and quantitative analysis of the amplitudes and frequencies of the vibrational components of the electromagnetic torque of the electric motor. Results. The conducted researches allowed to reveal the peculiarities of the effect of the parameters of the elements of various types of power circuits of the parametric control converters on the vibrational components of the electromagnetic torque of an induction electric motor. Calculations and physical modeling have been performed, it has been possible to establish the conditions for the occurrence of electromagnetic pulsations and to determine the ways of their elimination. It was found that the magnitude of pulsations of the electromagnetic moment of an induction electric motor in quasi-permanent modes depends on the selected power circuit of the converter's stator and rotor commutators, the composition of the elements included in them, and the connection circuits. Comparison of calculated and experimental waveform when starting induction electric motors indicates that the pulsation of the electromagnetic torque is affected by: the size of the opening angle of the valves, their control methods, the rotor speed, the parameters of the electric motor and the mechanism are static and inertial moments. At the same time, it was revealed that the use of resistor-thyristor modules in the power circuits of the stator and rotary commutators reduces the magnitude of the pulsation of the electromagnetic torque of the induction electric motor. Increase the value of its maximum and average torques. Limit the magnitude of the shock and alternating torques when it starts and the transition from one speed to another. Scientific novelty. It is proposed to use a generalized circuit of parametric control of an induction electric motor for studying the change in the electromagnetic torque. The circuit consists of resistor – thyristor modules in stator and rotary commutators. The presented technique allowed simultaneously to investigate transients during the control of an induction electric motor by various power circuits of converters. The results of calculations allow choosing the necessary power circuit, taking into account the vibrational components of the electromagnetic torque of the induction motor.
Authors and Affiliations
V. I. Lobov, K. V. Lobova
Keywords
Related Articles
- EP ID EP293051
- DOI 10.20998/2074-272X.2017.4.06
- Views 76
- Downloads 0
ON THE INFLUENCE OF THE LEVEL OF AN EXTERNAL MAGNETIC FIELD AND THE LENGTH ON THE MAGNETIC MOMENT OF CYLINDRICAL CORES
Purpose. Analysis of inhomogeneous magnetization of long cylindrical permalloy 50N cores by a uniform constant magnetic field and the influence of length and field level on their magnetic moment. Methodology. The magneto...
METHOD OF DETERMINING THE START TIME OF INDUCTION MOTORS IN THE CONTROL OF RESISTOR-THYRISTOR MODULES
Purpose. An electric general-purpose drive with asynchronous motor is proposed. For motor control in stator and rotor, circuits used resistors and thyristors. These elements included together in various ways. This allows...
STABILIZATION OF PARAMETERS OF ASYNCHRONOUS ELECTRIC DRIVE WITH VECTOR CONTROL
A problem of stabilization of parameters of the asynchronous electric drive vector control system is considered. Usually such systems have two control channels. The synthesis of stabilizing controllers is made for every...
THE CAPACITIVE STORAGE DEVICE IN THE CIRCUIT OF SYNCHRONOUS MOTOR EXCITATION FOR THE FIELD FORCING AND DISCHARGE
Purpose. Development of circuitry and control system with capacitive storage device in the exciting circuit of the synchronous motor for forcing and blacking out the field. Methodology. Mathematical modeling of transient...
MODELING OF OPERATION OF COAXIAL-LINEAR MOTORS WITH AXIAL AND RADIAL DIRECTIONS OF MAGNETIZATION OF PERMANENT MAGNETS IN DYNAMIC MODE
Theoretical and experimental investigations of the amplitude, phase and inertia-power frequency characteristics of two types of coaxial-linear electric motors of back-and-forth motion with permanent magnets, which magnet...