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Date submitted1981-10-16
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Date accepted1981-12-11
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Date published1982-07-13
Electromechanical test benches
- Authors:
- V. V. Rudakov
- R. P. Martikainen
- G. V. Oransky
Currently, two types of electromechanical test benches are widespread: load benches for testing electric motors and mechanical equipment under loading conditions that are as close as possible to the actual load; reproducing test benches for testing of actual control systems and regulators coupled with an electromechanical model that reproduces with a high degree of approximation the parameters and characteristics of the actual power electromechanical, hydro-mechanical or other system ...
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Date submitted1981-10-07
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Date accepted1981-12-26
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Date published1982-07-13
Reproduction on electromechanical models of two-mass electromechanical systems with elastic links and backlashes
- Authors:
- A. S. Soloviev
The issues of creating load devices for test benches and electrodynamic models are covered in the literature in sufficient detail. Most simply the load device of a test bench can be made on the basis of a DC machine with independent excitation, controlled by a power thyristor converter ...
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Date submitted1981-10-15
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Date accepted1981-12-06
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Date published1982-07-13
Electromechanical loading devices for reproduction of unsteady loads
- Authors:
- V. S. Soloviev
Electromechanical load devices used in the testing and development of new drive systems should consist of a load machine and a controlled converter, allowing the load to be varied ...
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Date submitted1981-10-25
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Date accepted1981-12-12
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Date published1982-07-13
Test bench for electric motors
- Authors:
- V. S. Soloviev
- V. S. Klimash
Reproducing machine drive loads in the testing and development of new systems requires special load devices. As a matter of principle, such devices should consist of a load machine and a controllable converter, allowing the load to be varied ...
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Date submitted1981-10-18
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Date accepted1981-12-11
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Date published1982-07-13
Measurement of electric motor parameters during bench tests
- Authors:
- Ya. P. Grinberg
- Yu. A. Volchensky
Mine tests of electric drives of mining machines do not give values of energy parameters ncosp, determining the thermal states of electric motors ...
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Date submitted1981-10-17
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Date accepted1981-12-20
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Date published1982-07-13
Determination of loads in transmissions of excavator electric drives
- Authors:
- N. A. Ambartsumyan
The task of determining the moment of resistance applied to the motor shaft often arises in the analysis and synthesis of control systems of automated electric drives, their adjustment and operation. The solution of this problem is of particular importance for systems with elastic mechanical elements in the transmission (lifting machines, excavators, etc.) ...
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Date submitted1981-10-01
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Date accepted1981-12-07
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Date published1982-07-13
Methodology of adjustment of electric drives control systems with the help of analog simulator
Adjustment of DC drives with subordinate control is usually performed in two stages. In the first stage, the converter units are adjusted: thyristor converters (TC) or DC generators and their exciters ...
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Date submitted1981-10-10
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Date accepted1981-12-06
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Date published1982-07-13
Calculation and experimental study of stabilized exciter of DC motor
- Authors:
- A. F. Dubinin
- T. O. Rosso
- A. V. Shipulin
Modern load benches use a DC machine as a load machine. Stabilization of the DC machine parameters for proper tuning of the entire bench is extremely important ...
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Date submitted1981-10-20
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Date accepted1981-12-06
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Date published1982-07-13
Analytical study of thyristor electric drive systems by means of computer
- Authors:
- V. A. Dartau
The preparation of the system of differential equations of electromechanical systems, and even more so the process of transformations to a convenient form for solving on a computer, usually takes much longer than programming and solving (computing) the computer ...
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Date submitted1981-10-08
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Date accepted1981-12-12
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Date published1982-07-13
Frequency control of asynchronous machine with voltage orientation
- Authors:
- I. M. Stolyarov
- Z. B. Sleptsova
Synthesis of a transient control system in a frequency-controlled asynchronous drive directly from equilibrium equations ...
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Date submitted1981-10-09
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Date accepted1981-12-13
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Date published1982-07-13
Device for measuring the magnetic flux parameters of induction motor
- Authors:
- I. M. Stolyarov
- A. P. Emelyanov
To generate transients of an induction motor, it is necessary to measure the stator or air gap flux-coupling. The most reliable flux sensor is a measuring coil located in the air gap or stator slots ...
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Date submitted1981-10-20
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Date accepted1981-12-26
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Date published1982-07-13
Structural synthesis of blocks of harmonic signal generators for frequency electric drives with vector control
- Authors:
- V. V. Alekseev
- V. A. Dartau
The harmonic signal generator (HGS) is the main unit of the trigonometric analyzer unit, which serves for extraction of unit reference functions - directional cosines of the rotating coordinate system, rigidly connected with the flux ...
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Date submitted1981-10-14
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Date accepted1981-12-02
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Date published1982-07-13
Synthesis of multiplication blocks for frequency electric drives with vector control
- Authors:
- V. V. Alekseev
An analog multiplier, intended for realization of the system of vector control of the frequency drive, should have not only an admissibly small relative vector error, but at realization in the form of a module to be distinguished by simplicity of execution and to be built on the basic element, perspective for execution in the form of a microcircuit ...
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Date submitted1981-10-08
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Date accepted1981-12-22
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Date published1982-07-13
Investigation of harmonic composition of THR output voltage and perfection of THR SIFUs for minimization of distortions of electromagnetic characteristics of induction motors
- Authors:
- T. O. Rosso
In the basis of the choice of the type of drive, providing minimum distortion of electromagnetic characteristics, should be based on the choice of motor type, taking into account its design features, the distribution curve of magnetic induction in the gap, winding parameters, the number of phases, etc., as well as the choice of the type of converter, providing in a given frequency range optimal harmonic composition of the shape of the supply voltage curve ...
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Date submitted1981-10-26
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Date accepted1981-12-14
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Date published1982-07-13
Voltage controlled asynchronous electric drive
- Authors:
- V. S. Klimash
Asynchronous electric drives of many machines and mechanisms of mining industry (for example, belt conveyors) operate with average load factor less than unity (0.4-0.6). Under these conditions, the weighted average power factor and efficiency of induction motors are much lower than the maximum possible values, resulting in poor motor utilization and excessive power consumption ...
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Date submitted1981-10-18
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Date accepted1981-12-03
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Date published1982-07-13
Analysis of three-phase asynchronous motor when fed from two sources of the same frequency connected in series
- Authors:
- V. V. Rudakov
The series connection of two AC sources of the same frequency will regulate the magnitude and phase of the voltage supplying the induction motor ...
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Date submitted1981-10-11
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Date accepted1981-12-02
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Date published1982-07-13
Modeling on the electrodynamic modem of the devices of the combined compensation of the network supplying the powerful drives
- Authors:
- N. V. Nefedova
Sustainable and highly productive operation of mining machines is largely determined by the quality of electrical energy in the underground distribution network. The main means of improving the quality of voltage at the terminals of electrical receptors are compensating devices that change the mode of operation of the distribution network, which directly affects the operation of the electric drive of combines ...
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Date submitted1981-10-02
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Date accepted1981-12-01
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Date published1982-07-13
Calculation methodology of the processes in the induction motor - controlled capacitance system
- Authors:
- I. I. Stolyarov
Increasing the efficiency of longitudinal-capacitive compensation (LCC) units in mine distribution networks, as well as preventing the occurrence of abnormal modes in the operation of electric drives with asynchronous motor (AM) is possible by regulating the capacitance of LCC ...
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Date submitted1981-10-04
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Date accepted1981-12-29
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Date published1982-07-13
Investigation on the electrodynamic model of the optimum parameters of the asynchronous motors of the mining harvesters
- Authors:
- Ya. P. Grinberg
Asynchronous electric motors of mining combines work in conditions of sharply variable loads, which parameters can be written off only by methods of random functions ...
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Date submitted1981-10-15
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Date accepted1981-12-20
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Date published1982-07-13
Thyristor switching device for determining the parameters of synchronous machines
- Authors:
- Z. B. Sleptsova
At present, methods of determining the parameters of synchronous machines (SM), based on the experience of damping of direct current in the stator windings are becoming increasingly common ...
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Date submitted1981-10-30
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Date accepted1981-12-12
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Date published1982-07-13
Generalized relations for obtaining mathematical expressions of the laws of electromagnetism
- Authors:
- O. N. Tikhonov
The formula from which the mathematical expressions of the laws of Coulomb, Ampere, Faraday can be derived, has the form ...
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Date submitted1981-10-16
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Date accepted1981-12-30
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Date published1982-07-13
Automated electrohydraulic actuator of the executive body of a mining combine harvester
- Authors:
- B. S. Makhovikov
To solve the problem of automating the drives of the executive bodies of combine harvesters and other mining machines, a number of control algorithms known under the names of minimum and maximum variants, as well as parametric stabilization of cutting modes ...