Mathematical Model of Start for a Piston Compressor Electric Drive of a Ship Refrigerator

2019 ◽  
Author(s):  
Alexey V. Vyngra ◽  
Boris A. Avdeyev ◽  
Roman F. Abdurakhmanov ◽  
Valeriy V. Yenivatov ◽  
Igor K. Ovcharenko
Keyword(s):  
Mathematical Model ◽  
Electric Drive ◽  
Piston Compressor

Simulator for Electric Drives Research

2014 ◽  
Vol 698 ◽  
pp. 12-18
Author(s):  
Anatoliy Ziuzev ◽  
Konstantin Nesterov ◽  
Mikhail Mudrov
Keyword(s):  
Mathematical Model ◽  
Electric Drive ◽  
Electric Drives ◽  
Power Part ◽  
Software And Hardware

The simulator of power part of electric drive for research purposes of electric drives is under consideration in the paper. It is based on the software and hardware of National Instruments Company and includes mathematical model of converter, motor and load. The simulator is designed to setting up the electric drive and to explore the modes of its operation.

scholarly journals Mathematical model of traction electric drive for mine electric train

2014 ◽  
Vol 19 ◽  
pp. 01040 ◽  
Author(s):  
S.N. Kladiev ◽  
B.I. Pyakillya ◽  
A.D. Vilnin
Keyword(s):  
Mathematical Model ◽  
Electric Drive ◽  
Traction Electric Drive ◽  
Electric Train

scholarly journals Mathematical Model of Combined Configuration Motor of Separator Electric Drive

2021 ◽  
pp. 30-38
Author(s):  
Yakov Kashin ◽  
◽  
Lev Kopelevich ◽  
Aleksandr Samorodov ◽  
Vladislav Kim ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Electric Drive

scholarly journals Principle of Organization for Laboratory Stand of the Electric Drive with a Real Regulatory System No Time Scaling

2021 ◽  
Vol 100 ◽  
pp. 06002
Author(s):  
Andrii Pirozhenko ◽  
Yevhenii Modlo ◽  
Ruslan Shaida ◽  
Viktor Batarieiev ◽  
Mykola Zhukov ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Electric Drive ◽  
Optimal Algorithm ◽  
Regulatory System ◽  
Mode Switching ◽  
Fourth Generation ◽  
Practical Training ◽  
Design Scheme ◽  
Time Scaling ◽  
Three Phase

The existing practical training of specialists in the field of the electric drive is recognized as insufficient, not allowing them to conduct independently a complex of adjustment works or works on elimination of refusals. All known virtual methods of research of electric drives are scaled in time therefore at the trained skills on use of the measuring and registering devices during the work on real installation don't develop, and also skills on work with real knots of control systems for control of the set drive modes. We propose a stand consisting of a real system of regulation and the model of the power drive to work without time scale, thus significantly closer to the actual laboratory setting drive. The structure of the laboratory stand on the basis of the engine of a direct current of independent excitement with the reversible thyristor converter is in details considered. It is proved that an optimal algorithm for the simulation of three-phase bridge converter operating at anchor chain is an algorithm which rooms include a thyristor and of the remaining thyristors allows you to choose the design scheme and carry out the integration of equations describing electric processes in the circuit detect a change in state of the thyristors and the transition to other design scheme. Given the discrete model and considered design scheme of three-phase bridge Converter in a normal mode switching thyristors and emergency mode, if false turn on of the thyristor during commutation. Mathematical model of the device - the solution of differential equations by numerical integration of the Runge-Kutta. Proposed hardware mathematical model based on the family of microcomputer ARM СortexTM fourth generation.

scholarly journals Mathematical modelling of transients in the electric drive of the turnout of the mono-sleeper type with switched-inductor motor

2021 ◽  
pp. 16-22
Author(s):  
S. G. Buriakovskyi ◽  
A. S. Maslii ◽  
L. V. Asmolova ◽  
N. T. Goncharuk
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Electric Drive ◽  
Pid Controller ◽  
Ball Screw ◽  
Railway Track ◽  
Nonlinear Friction ◽  
Friction Characteristic ◽  
Inductor Motor ◽  
Screw Gear

Introduction. The study is devoted to the development of the functionality of a railway track switch by introducing a switched-inductor electric drive. This solution justifies simplifying the mechanical part of the switches by changing the gearbox to a ball-screw and locating the all kinematic line of the switches on the mono-sleeper type. Goal. A study of the mono-sleeper turnout type behaviour to meet modern traffic safety requirements and improve operational reliability factors. Methodology. Based on electric drive theory, a kinematic line of a mono-switch turnout type with nonlinear friction characteristic is presented. Using differential equation theory and Laplace transformation, a mathematic description of a four-phase switched-inductor motor with ball-screw in a mechanical line of a single-mass electromechanical system has been made. A simulation mathematical model of the electric drive of mono-sleeper turnout type as the control system with a switched-inductor motor and nonlinear friction characteristic was built in MATLAB. Results. Simulation modelling of a mathematical model of a mono-sleeper turnout type with a switched-inductor motor and ball-screw gear has been developed and implemented. Studies of dynamics of turnout point movement have shown that, in contrast to the motors used today, the switched-inductor motor makes it possible to simplify the mechanical part of the drive, which leads to reduced time spent on laying and maintenance of turnout points, and therefore makes the design more reliable. The application of PID controller and fuzzy speed controller has shown improved dynamics of turnout point, while the fuzzy PID controller provides better performance of the set values and turnout point movements. Originality. First developed a mathematical model of the electric drive of the mono-sleeper turnout type, taking into account nonlinear friction characteristic, as an object of speed control of turnout point movement, is developed. Practical value. The developed mathematical model of a railway track turnout of the mono-sleeper type with a switched-inductor motor and ball-screw gear enables more efficient use of a microprocessor control system, creation of promising electric motor protection means and control of a turnout point.

Mathematical model of asynchronous frequency controlled electric drive for different types of load

2021 ◽  
Vol 143 (2) ◽  
pp. 199-206
Author(s):  
M. Mustafin ◽  
◽  
N. Almuratova ◽  
N. Darimbayeva ◽  
G. Daurenova ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Electric Drive ◽  
Different Types

Calculation of the Parameters of a Mathematical Model of an Electric Hybrid Stepper Motor Based on the Analysis of the Magneto Static Field Pattern

2019 ◽  
Vol 20 (8) ◽  
pp. 482-489
Author(s):  
S. V. Volkov ◽  
O. V. Goryachev ◽  
A. G. Efromeev ◽  
A. O. Stepochkin
Keyword(s):  
Mathematical Model ◽  
Natural Frequency ◽  
Electric Drive ◽  
Magnetic Circuit ◽  
Stepper Motor ◽  
Design Parameters ◽  
System Of Equations ◽  
Magnetostatic Field ◽  
Resonant Frequencies ◽  
Electromagnetic Moment

The article presents a solution to the problem of calculating the parameters of a mathematical model of an electric hybrid stepper motor based on an analysis of the picture of its magnetostatic field. The main disadvantage of such an engine described. Is the mid-frequency resonance, which occurs due to the coincidence of the natural frequency of the rotor with the frequency of the supply voltage pulses. The necessity of taking this factor into account when designing a discrete electric drive system based on the executive motor of this type by calculating the values of resonant frequencies and using them in developing the drive control algorithm is shown. The task of developing a mathematical model of the engine is formulated, which allows to analyze the influence of its design parameters on the spectrum of resonant frequencies. The method of calculating the parameters of a given mathematical model is formed. The variants of the mathematical description of this electric machine are considered and the selection of its known mathematical model is made based on the equivalent electric circuit. The numerical calculation of the spatial pattern of the magnetostatic field of the electric motor is performed. Based on the analysis of the calculation results, a system of assumptions has been formed to develop an equivalent magnetic circuit of an electrical machine. An equivalent magnetic circuit and the corresponding system of equations has been developed. Formed a system of equations of a mathematical model based on the equivalent circuits of the electric and magnetic circuits.On the basis of the obtained system of equations, a simulation model of a discrete electric drive was developed in the Simulink software package. Using the obtained simulation model, the calculation of transients on the angle of rotation of the rotor and the electromagnetic moment is carried out and the influence of one of the design parameters on the natural frequency of the rotor is analyzed. Based on the simulation results, it is shown that with an increase in the air gap height of a hybrid stepper motor, the resulting electromagnetic moment decreases, and the natural oscillation frequency of the rotor decreases, and the frequency at which medium-frequency resonance occurs also decreases. This mathematical model can be used at the stage of the correct calculation of the selected engine, since allows you to analyze the effect of a specific design parameter of the machine — in particular the size of the air gap on the natural frequency of the rotor, and, consequently, on the spectrum of the resonant frequencies of a discrete electric drive.

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