scholarly journals COMPENSATION OF ELASTIC VIBRATIONS OF INDUSTRIAL MECHANISMS

2022 ◽  
Vol 1 (15) ◽  
pp. 82-85
Author(s):  
Nikolay Fedoreshchenko ◽  
Ksenya Lineytseva

The method of compensation of elastic vibrations of electric drives of industrial positioning mechanisms, as well as methods for assessing the level of these vibrations are shown. It is proposed to choose the parameters of the electric motor and the mechanism optimal according to the criterion of minimum vibrations at the design stage of the displacement mechanisms. Positioning mechanisms of the "actuator" type with screw –nut transmission make it possible to implement this approach

Vestnik IGEU ◽  
2020 ◽  
pp. 31-45
Author(s):  
T.H. Abuziarov ◽  
A.S. Plehov ◽  
A.B. Dar’enkov ◽  
A.I. Ermolaev

When designing electric drives based on brushless DC motors with permanent magnets (BLDC), which have low level torque pulsations, the problem of modelling non-standard topological solutions appears. The known models of BLDC motors are either based on the assumptions about the symmetry of the stator pa-rameters of the electric motor and/or the ideal form of the phase back-EMF waveform, which reduce the accuracy of evaluating the effectiveness of the proposed solutions or prove unusable for modelling an operation of the electric motor with a non-standard semiconductor converter. It is necessary to develop a mathematical model of the BLDC motor-based electric drive that takes into account the structural features of the electric motor and allows for semiconductor converter configuration variability. The model is designed in the Matlab Simulink environment. The verification is carried out by comparing the modelling results with experimental data obtained previously by other researchers. The proposed method for generating phase back-EMF in the BLDC motor model provides the possibility for the user to set the EMF form templates independent for each phase. The proposed method for stator circuit simulating provides the user with access to each of the stator windings leads as well as with the possibility of asymmetric determination of each parameter of the electric motor. Upon verification, it has been shown that the difference in the control points between the simulated and experimental speed-torque curves does not exceed 3,5 %. The developed model allows analyzing the static and dynamic characteristics of operation modes of non-standard topology BLDC motor-based electric drives taking into account the stator pa-rameters asymmetry and the real phase back-EMF waveform. The specified features of the model allow exploring the operation of the designed electric drive, taking into account the BLDC motor and converter design. The model can be applied when checking atypical design decisions and when changing the set parameters of the electric drive and restrictions on working conditions and target functions to refine the control system algorithms and automate the search for optimal parameters of the motor and the semiconductor converter.


Author(s):  
Dmitry Shprekher ◽  
◽  
Gennady Babokin ◽  
Evgeny Kolesnikov ◽  
Dmitry Ovsyannikov ◽  
...  

The article analyzes the uneven loading of the scraper conveyor electric motors. The most common type of multi-motor conveyor is considered here: two-drive, with head and end drives connected through gearboxes and sprockets by an endless chain with scrapers. The simulation results are presented for three variants of com-binations of parameters of electric drives. It has been established that the use of a two-motor variable frequen-cy drive of a scraper conveyor powered by a single frequency converter inevitably entails uneven loading of the electric motors of the head and end drives. To eliminate this disadvantage, it is proposed to supply each electric motor from its own frequency converter. A system of automatic load balancing is proposed. The implementation and the result of the work of the load balancing system are carried out on a model in the Matlab / Simulink system.


2018 ◽  
Vol 8 (12) ◽  
pp. 2391 ◽  
Author(s):  
Christian Rivera ◽  
Javier Poza ◽  
Gaizka Ugalde ◽  
Gaizka Almandoz

The applications using electric motors have increased in the last decade. Some of these applications encounter the need for tailor-made motors that must meet demanding requirements. Therefore, the specification stage of an electric motor is a critical part of its development. If this stage is properly addressed, then future failures in the development process can be avoided. This paper presents a requirement engineering framework to support small-medium electric motors designers/manufacturers with the development of their product. The framework identifies the stakeholders and the tasks that they should undertake to finish a successful requirements specification stage. The framework is made from the designer/manufacturer’s perspective and it emphasizes the derivation of specialized requirements (lower-level). The result of the framework is well-defined requirements that form the design requirements specification of the motor that leads to the beginning of the design stage.


2014 ◽  
Vol 656 ◽  
pp. 154-163
Author(s):  
Konstantin Samson Ivanov

In work theoretical bases of an adaptive robotics are stated. The adaptive robotics considers creation, research and designing of robots with adaptive electric drives of modules. The adaptive drive contains the electric motor and the adaptive gear mechanism possessing property independently to change output speed of movement depending on loading. This property of adaptation is named by self-regulation. Self-regulation is carried out only for the account of mechanics and does not demand management. The adaptive drive demands smaller capacity, overcomes emergency overloads, is structurally simple, has small dimensions and weight. These advantages are especially important for intermediate modules of the manipulator. Use of adaptive drives procures high power efficiency of the robot.


Author(s):  
A. Ya. Krasilnikov ◽  
A. A. Krasilnikov

In article the determination possibility of the transferring torsional moment of the face magnetic coupling with highly coercive permanent magnets is considered. The received mathematical expression allows at a stage of the engineering design to define the transferring torsional moment of the face magnetic coupling depending on the asynchronous electric motor maximum torque data given by the directory on electric motors, and to calculate a phase shift angle of semicouplings taking into account their inertia moments, driven and slave rotating masses of machine, the operating torques of the electric motor, magnetic coupling and the machine itself on the stages of documentation development work.


2021 ◽  
Vol 1889 (4) ◽  
pp. 042057
Author(s):  
O A Rokachevskii ◽  
V V Sleptsov ◽  
A E Ablaeva ◽  
S A Kanaev ◽  
O V Moskalenko

2014 ◽  
Vol 30 (1) ◽  
pp. 31-46
Author(s):  
Zbigniew Jakielaszek ◽  
Mirosław Nowakowski

Abstract The study outlines the technique for flight tests carried out for a plane powered by an electric drive and the method for standardization of performance parameters applicable to evaluation of test results. Due to the relatively new type of drive, which is an electric motor, the literature references provide no descriptions of such issues. Therefore the solutions presented in the paper are the own contribution of the research team from Air Force Institute of Technology (ITWL).


2019 ◽  
Vol 109 (05) ◽  
pp. 335-341
Author(s):  
T. Schriefer ◽  
N. Schreibmüller ◽  
C. Horwath ◽  
W. Moritz ◽  
N. Moosmann ◽  
...  

Dem steigenden mechatronischen Integrationsgrad im elektrischen Antriebsstrang des Automobils wird mit neuartigen Kontaktsystemen begegnet. Unter Einsatz analytischer und numerischer Modellbildung sowie experimenteller Prüftechnik werden Leistungskontakte entwickelt, um hohe Energiedichten innerhalb der physikalischen Komponenten Traktionsmaschine, Leistungselektronik und Batteriespeicher zu übertragen.   The increasing level of mechatronic integration in the electric powertrain of automotive vehicles is overcome by innovative power connectors. Utilizing analytical, numerical and experimental procedures, high-current connectors are developed to transmit electrical loads within the key components electric motor, power electronics and battery system.


Author(s):  
Eduard Grekov ◽  
◽  
Alexei Bezgin ◽  
Viktor Sorokin ◽  
Ildar Yamansarin ◽  
...  

The energy indicators of the EKG-5 excavator lifting electric drive with thyristor power circuits have been determined according to the systems thyristor direct frequency converter - two-phase asynchronous electric motor, converter-DC motor and direct frequency converter - three-phase asynchronous electric motor. Losses in electric motors and converters have been determined, taking into account the specifics of their joint work in theefficiency for the excavation cycle were determined based on the results of calculating the simulation model, the initial data for which were the parameters of the excavation cycle of the lift drive of a real excavator. Distortion coefficients of the mains current were determined for two cases: during digging and during accelerated lowering of an empty bucket. For comparison, the energy indicators of the selected electric drives with a filter-compensating device were calculated. The analysis of energy indicators is made.


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