SovietRxiv · Open Access in English
Rediscovering the Soviet scientific archive, in English
25357 full-text translations 14926 English PDFs 22539 abstracts
Showing 50 of 25357 papers
This paper examines how magnetic circuit saturation affects the choice of reverse voltage applied to the field winding during field suppression of a surge generator. Using a two segment piecewise linear approximation of the magnetization curve, the authors derive expressions for rotor currents, flux…
This paper examines capacitor self-excitation and braking in single-phase operation of induction machines, particularly when two phases of a three-phase machine are used with an asymmetrically connected capacitor. Using approximate analytical relations, mathematical modeling, and experimental observ…
The paper examines calculation of transient processes in electromechanical pulse sources whose differential equations may have periodic, variable, or otherwise analytically inconvenient coefficients. It argues for applying the method of successive differentiation with the state variables chosen as f…
The paper examines transient processes in a valve pulse generator consisting of a synchronous generator suddenly connected through an uncontrolled semiconductor rectifier to an active load. Using the complete differential equations of the generator, rectifier, and load, with analog computer modeling…
This paper addresses transient electromagnetic processes in a synchronous generator supplying a cycloconverter for low-frequency voltage generation, where analytical treatment is complicated by valve nonlinearities and the generator’s coupled circuits. The authors formulate an analog-computer mathem…
This paper examines a synchronous electromechanical pulse generator intended to increase pulse power and permissible repetition frequency. It proposes adding a semiconductor switching device to the quadrature-axis damper winding and analyzes the pulsed operating process using flux-linkage conservati…
This paper develops a mathematical model of electromechanical transients in a pulsed power source based on an impact synchronous generator with an asymmetric rotor and two stator windings. The authors formulate voltage balance, flux linkage, and rotor motion equations in physical axes for analog com…
This paper addresses the optimal distribution of thermal and electrical loads among units of a thermal power plant in order to reduce total fuel consumption. It formulates the task as minimization of overall boiler fuel use and describes an implementation on an EMU-10 analog computer with an automat…
The article examines how economic and technological management of small-capacity thermal power plants can be automated using information-computing systems. It identifies the main management functions with the greatest operational reserves: collection and processing of process data, optimization of b…
This paper examines the use of automatic pulsed-arc welding with flux-cored wire to improve weld formation in non-flat positions, where conventional open-arc flux-cored welding is limited by unstable droplet transfer and molten pool run-off. Experiments using an automatic machine with constant wire …
This paper addresses the stabilization of sheet glass thickness in vertical drawing when transport delay between formation and measurement can undermine control-system dynamics. It reviews the limitations of predictive and Smith-type schemes that require a technically complex model with automaticall…
The paper examines dynamic stability in separately excited motor speed stabilization systems in which speed is regulated by varying excitation flux through a thyristor pulse-width regulator. Using small-deviation equations for free motion, it derives an open-loop transfer function that accounts for …
A speed stabilization system is described for shunt-wound direct-current motors operating with large supply-voltage fluctuations and load changes, under the constraint that no additional electric-machine devices such as a tachogenerator be used. The system measures rotational speed by a built-in tra…
This paper examines reverse currents in isolated collector and emitter junctions as a criterion for the quality and operational stability of low-power transistors used in threshold switching devices. It distinguishes bulk junction current from surface leakage components caused by channel and ionic c…
The paper addresses forced commutation in pulse slip regulation of an induction motor using antiparallel-connected thyristors, with the aim of reducing the number of commutation devices. It proposes a regulator circuit with a single common series-type forced-commutation unit and analyzes the quasi-s…
This paper analyzes the external characteristics of a six-phase compensating converter with an equalizing reactor and a two-stage forced-commutation unit, a configuration intended to improve the power factor of valve converters. By separating the rectified-voltage period into intervals with one and …
This paper examines the difficulty of applying sinusoidal pulse-width modulation to three-phase bridge voltage inverters with pole commutation, where conventional pulse regulation relies on simultaneous turn-off of valves and therefore cannot directly realize unequal pulse durations. It proposes a m…
This paper examines the stability of a closed-loop inverter output-voltage control system using pulse-width regulation under the assumed equivalence of continuous and pulse systems. It formulates transfer functions for the rectifier and resonant AC output filter, reduces the filter model to two seco…
This paper examines how the time variation of supply frequency and voltage affects transient performance in open-loop frequency control of induction motors. Using expressions for the decaying periodic components of transient electromagnetic torque, the authors relate starting smoothness and speed of…
This paper develops a mathematical description of electromagnetic processes in an induction motor drive supplied by a nonsinusoidal, stepped voltage. By transforming the supply voltage to a reference frame rotating with the stator field, the authors decompose the machine equations into zero-frequenc…
This paper examines frequency control of an induction motor when a semiconductor frequency converter forms a sinusoidal stator current despite a nonsinusoidal voltage. Starting from the conventional voltage control law associated with M. P. Kostenko, the authors derive a torque expression for curren…
This paper describes a frequency reversal system for a synchronous hysteresis hydraulic motor intended for inertial navigation applications requiring stable kinetic moment and short reversal intervals. The authors present a static converter based on stepwise approximation of a sinusoidal voltage, us…
This paper proposes a calculation method for bridge m-phase voltage inverters with symmetrical linear loads, representing the inverter as a pulse element and applying the discrete Laplace transform to determine vector responses. The formulation separates quasi-steady-state and transient components, …
This paper develops a switching function formulation for determining the instantaneous output voltages of an m-phase inverter supplied by an ideal source. It expresses phase and line voltages, as well as the generalized voltage vector, directly through the supply voltage and phase switching function…
This paper proposes a starting method for frequency-controlled synchronous reluctance motors intended to reduce starting current, shorten acceleration, and prevent sticking near half synchronous speed. The authors analyze the stator current components during direct starting and relate the torque dip…
This paper examines asymmetric capacitor braking of a synchronous reluctance motor after disconnection from the supply, when residual magnetization or capacitor charge produces self-excitation and generator operation. Using experimental braking characteristics for a DRS-150M motor and a simplified e…
This paper describes a cathode-ray-tube display device designed to improve the interactive visualization of digitally processed seismic information. The authors argue for a raster-scanning approach suited to seismic sections, in which data are read sequentially from computer memory, converted to ana…
This paper addresses the design of compact frequency-selective filters for the analog channel of a seismic section plotter, where conventional LC filters create difficulties in size, matching, load dependence, and multichannel reproducibility. It compares active filter types and argues for active RC…
A low-frequency logarithmic amplifier for laboratory seismic equipment is described, using diode logarithmic elements in a common negative-feedback circuit. The circuit differs from earlier designs by placing the feedback around both the input and output coupling capacitors, which permits smaller lo…
This paper analyzes input circuit configurations for reproducing seismic information from magnetic tape using a low-resistance universal magnetic head. It compares transformer coupling, open-circuit operation, short-circuit operation, and an intermediate capacitive-coupled mode, arguing that transfo…
This paper describes a logical control system for the PSR-II seismic section builder, an output device intended to convert digitally processed seismic information from universal computers into analog records suitable for interpretation. The authors outline the need for automated high-speed output to…
This article analytically examines whether emitter positive feedback, introduced by a transformer from the transistor emitter circuit to the base circuit, can reduce the noise figure of a low-frequency weak-signal amplifier. Using the low-frequency Giacoletto transistor noise model and signal-flow-g…
The paper derives an analytical relation between the low-frequency noise inflection frequency and macroscopic parameters of silicon planar bipolar transistors used in common-emitter low-noise input stages operating in the microcurrent regime. Using Giacoletto’s equivalent noise circuit, an empirical…
This paper describes the design of a hardware multiplier for specialized high-speed computing machines, intended for numbers in semilogarithmic form with an 11-bit normalized mantissa and a 4-bit exponent. It compares sequential, tabular, and matrix multiplication approaches, then develops a matrix …
The paper examines the problem of recording, reproducing, and preserving large volumes of geophysical information over storage periods that may approach a century. It argues that magnetic tape, then the principal medium for seismic data, imposes serious constraints in durability, environmental requi…
This paper analyzes the quasi-steady-state operation of a direct-coupled DC boost converter in the case where galvanic isolation is not required and output-voltage ripple is small relative to its average value. Assuming ideal switching elements, the authors derive differential equations for the indu…
This paper analyzes electromagnetic quasi-steady-state processes in reversible DC electric drives with series-excited motors under pulse speed control, where separate diode shunting of the armature and field circuits can produce unequal average currents and ripple levels. Using idealized assumptions…
This paper addresses the influence of rectified supply voltage ripple in DC electric drives using an uncontrolled rectifier, reversible pulse-width converter, and motor. It argues that filtering is often impractical at higher motor powers, and proposes compensating the ripple by additionally modulat…
This paper examines how to select and regulate the switching frequency in DC electric drives using thyristor reversible pulse-width converters. It argues that frequency choice should not be based only on minimizing additional losses, but must also account for thyristor turn-off time, voltage utiliza…
This paper compares thyristor and electromechanical reversible converters for DC electric drives of winches with autonomous power supply and automatic rope tension control. It evaluates their suitability for low and medium speed tracking operation, frequent reversals, and operation against a stop, c…
The article addresses calculation of operating and angular static characteristics of a synchronous motor with automatic excitation regulation, particularly where excitation current is controlled as a function of the internal operating angle. It proposes a graphical calculation procedure using U-shap…
The paper examines stabilization of the rotational speed of a DC motor in a telegraph apparatus subject to cyclic load torque changes. Using optimal control theory and the maximum principle with response time as the criterion, it derives a relay control law with at most one switching and develops ph…
This paper develops a method for calculating the mechanical characteristics of separately excited DC motors supplied by reversible thyristor pulse width converters with symmetrical control. It analyzes quasi steady electromagnetic modes while accounting for the necessary thyristor switching delay, d…
This paper addresses frequency-domain analysis of automatic control systems for electric drives with dependent motor excitation, where the electromotive force depends on the product of speed and excitation flux and therefore introduces a multiplication-type nonlinearity. Using harmonic linearization…
This paper presents a two-position armature-current control system for starting separately excited DC motors, addressing the difficulty of current pulsations caused by the low inertia of armature circuits. The proposed system combines a current sensor, sawtooth generator, comparison circuit, trigger…
This paper addresses the experimental determination of the time constant of an equivalent eddy-current circuit in the excitation winding of a dc electrical machine, a parameter needed to account for damping during electromagnetic transients. The authors model the influence of eddy currents by replac…
This paper describes a relay automatic control system for regulating the regenerative braking current of a traction electric motor using a thyristor converter. The proposed circuit compares a reference voltage with a sawtooth signal whose amplitude depends inversely on armature current, alternately …
This paper examines relay regulation of traction motor starting current and addresses the drawbacks that limit conventional relay systems, especially variable switching frequency and the difficulty of multiphase control in contact-network powered installations. It proposes a two-channel relay contro…
This paper applies harmonic analysis to the variable component of magnetizing current in DC electric machines with pulse-width excitation control, taking into account the damping influence of eddy currents. Starting from previously derived quasi-static equations for the excitation circuit, it repres…
This paper derives equations and transfer functions for a relay automatic control system that regulates the starting current of a series-excited traction motor under direct starting and field-weakening conditions. The analysis models the thyristor switching process with generalized functions and inc…
