Journal ArticleDOI
On the Analysis of the Three-Phase Induction Motor with Voltage Control by Thyristor Switching
Reads0
Chats0
TLDR
In this article, the three-phase induction motor, at constant speed, can be represented by five loop voltage equations in terms of variable inductance coefficients and instantaneous winding currents, and possible approaches are discussed.Abstract:
The three-phase induction motor, at constant speed, can be represented by five loop voltage equations in terms of variable inductance coefficients and instantaneous winding currents. Voltage control by symmetrical triggering of inverse parallel connected pairs of thyristors in the stator winding branches causes the motor excitation voltages to be segments of sinusoids. Current conduction angle at a given speed depends on the triggering angle. The system currents reduce to a set of five first-order differential equations with periodically varying coefficients. No general solution of these is known but possible approaches are discussed. A numerical or analog approach seems desirable.read more
Citations
More filters
Journal ArticleDOI
The Analysis of Induction Motors with Voltage Control by Symmetrically Triggered Thyristors
TL;DR: In this paper, an analytic method for predicting the steady-state performance of an induction motor with variable voltage control is presented, which is well suited to the evaluation of proposed motor designs when used in conjunction with thyristor voltage control.
Journal ArticleDOI
Performance optimization of induction motors during Voltage-controlled soft starting
TL;DR: In this paper, the performance optimization of medium/high-power induction motors during soft starting by eliminating the supply frequency torque pulsations, and by keeping the line current constant at the preset value, is discussed.
Journal ArticleDOI
Adjustable speed AC drives—A technology status review
TL;DR: In this paper, the authors reviewed the present status of ac drives technology in which the salient technical features of ac machines, converters, controls, and performances of the integrated drive systems have been discussed, and the appropriate trend of the technology has been indicated.
Proceedings ArticleDOI
Soft starting of large induction motors at constant current with minimised starting torque pulsations
TL;DR: In this paper, the performance of a voltage-controlled large induction motor soft starter has been improved, resulting in nearly perfect current and torque profiles, and some simple control strategies have been proposed to keep the current constant at any preset value during starting, and to eliminate supply-frequency starting torque pulsations.
Journal ArticleDOI
Analysis of variable-voltage thyristor controlled induction motors
S.A. Hamed,B.J. Chalmers +1 more
TL;DR: In this paper, the steady-state performance of a variable-voltage thyristor controlled induction motor system is analyzed based on the representation of the rotor as a sinusoidal EMF in series with a resistance-inductance circuit.
References
More filters
Journal ArticleDOI
Frequency Analysis of Variable Networks
TL;DR: It appears that the frequency domain approach using H(jω; t) possesses significant advantages over the conventional approach using the impulsive response of the network.
Journal ArticleDOI
Simulation of Symmetrical Induction Machinery
Paul C. Krause,C. H. Thomas +1 more
TL;DR: The effectiveness of an analog computer in studying the performance of induction machinery is demonstrated with computer results which show the dynamic behavior of 2-phase and 3-phase machines during balanced and unbalanced operation.
Journal ArticleDOI
Two-reaction theory of synchronous machines — Part II
TL;DR: In this article, the analysis presented in a previous paper is extended to include a consideration of synchronizing and damping torque during continuous and transient oscillations, the description of an equivalent circuit which has been found useful in calculating the decrement of the short circuit current of interconnected machines, and the derivation of simple approximate formulas for the roots of the equation determining the wave shape of the current on three-phase short circuit.