Hybrid Multi-Physics Modeling of an Ultra-Fast Electro-Mechanical Actuator

Bissal, Ara; Eriksson, Anders; Magnusson, Jesper; Engdahl, Göran

doi:10.3390/act4040314

Cited by 20 publications

(6 citation statements)

References 21 publications

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“…However, the disadvantage of the solution is the complexity of the drive mechanism and the cost of its implementation. Another solution is spring mechanisms accelerated by electromagnetic systems [6,20,21]. In contrast to the drive built on the basis of the Thomson coil, these mechanisms are characterized by simpler construction and lower cost of execution.…”

Section: Literature Reviewmentioning

confidence: 99%

Thyristor Arc Eliminator for Protection of Low Voltage Electrical Equipment

2019

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The paper presents the layout of two opposing thyristors working as an Arc Eliminator (AE). The presented solution makes it possible to protect an electrical apparatus against the effects of an arcing fault. An Arc Eliminator is assumed to be a device cooperating with the protected apparatus. Thyristors were used because of their speed of operation and a relatively lower cost compared to other semiconductors with the same current-carrying capacity. The proposed solution, as one of the few currently available, makes it possible to eliminate the fault arc—both at short-circuit currents and current values to which overcurrent protections do not react. A test circuit was designed and made to study the effectiveness of the thyristor arc eliminator. A series of tests was carried out with variable impedance in the arc branch, including the influence of circuit inductance on arc time. It was found that the thyristor arc eliminator effectively protects devices powered from a low voltage power network against the effects of a fault or arc fault. The correctness of system operation for a wide range of impedance changes in the circuit feeding the arc location was demonstrated.

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Section: Literature Reviewmentioning

confidence: 99%

Thyristor Arc Eliminator for Protection of Low Voltage Electrical Equipment

2019

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“…Linear pulse electromechanical converters (LPEC) allow to provide a high speed of the actuator (A) in the short active area and/or to create powerful force pulses at its slight displacement [1][2][3]. Such converters are used in many branches of science and technology as electromechanical accelerators and shockpower devices [4,5]. One of the most promising is LPEC of electrodynamic type [6,7].…”

Section: разработана цепная математическая модель линейного импульсноmentioning

confidence: 99%

Influence of Geometrical Parameters of the Inductor and Armature on the Indicators of a Linear Pulse Electromechanical Converter of an Electrodynamic Type

Bolyukh¹,

Kashanskij²,

Schukin³

2019

Elektroteh. elektromeh.

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The aim of the paper is to study the influence of geometrical parameters, namely, the number of layers and the cross section of the copper tire of the inductor and the armature coils on the power and speed indicators of a linear pulse electromechanical converter (LPEC) of an electrodynamic type. Methodology. On the basis of the developed chain mathematical model, recurrent relations are obtained for the calculation of interconnected electromagnetic, mechanical and thermal processes of LPEC of an electrodynamic type. The effect of the thickness of a square copper tire and the number of its layers in the inductor and armature coils on the characteristics and characteristics of electrodynamic LPEC is investigated. It is these parameters that determine the number of turns and the axial height of the coils with limited radial dimensions. Results. The influence of the geometrical parameters of the inductor and the armature coils with limited radial dimensions on the electrical and mechanical characteristics of LPEC of an electrodynamic type is established. It has been established that with an increase in the thickness of a rectangular cross-section of copper tire from 1 to 2.5 mm, an increase in the amplitude and pulse of electrodynamic forces (EF) occurs. However, the maximum speed of the armature is the highest at LPEC wound with a 1.5 mm thick tire. The highest efficiency value is demonstrated by LPEC, in which the inductor and armature coils are wound with a 2 mm thick tire. With an increase in the number of layers of the inductor coil tire, the amplitude of the EF decreases significantly, and the magnitude of the EF pulse decreases slightly. As a result, the maximum armature speed, efficiency and temperature rise of the coils are reduced. Originality. It is established that the largest amplitude of the EF is realized in LPEC with the minimum number of layers of tires of the inductor and armature coils. The largest value of the pulse EF occurs when the maximum number of layers of the inductor and the armature. In this case, the largest values of the amplitude and pulse of the EF occur under the condition that the number of tire layers of the inductor and the armature coils are the same. Practical value. It has been established that the greatest efficiency 21.82 % is realized in LPEC, in which the number of tire layers is 2 mm thick with inductor and armature coils are 4. A catapult model for launching an unmanned aerial vehicle was made and tested on the basis of LPEC of an electrodynamic type. References 12, figures 6. Key words: linear pulse electromechanical converter of electrodynamic type, chain mathematical model, recurrent relations, geometrical parameters of inductor and armature coils, electrodynamic forces, efficiency.

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“…Such accelerators are used in test installations for shock loads, in high-speed electrical devices and valve-switching equipment, in launchers, etc. [6][7][8][9][10][11] for example, work [12] describes a setup for testing electronic equipment in a collision with a moving object. Launchers are also used for many classes of unmanned aerial vehicles [4,13].…”

Section: Introductionmentioning

confidence: 99%

Influence of the initial winding displacement on the indicators of the electromechanical induction accelerator of cylindrical configuration

Bolyukh¹,

Schukin²,

Lasocki

2021

Electrical Engineering & Electromechanics

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Purpose. The purpose of the article is to determine the influence of the initial displacement of the windings on the indicators of an electromechanical induction accelerator of a cylindrical configuration with pulsed excitation from a capacitive energy storage and with short-term excitation from an alternating voltage source. Methodology. To take into account the interrelated electrical, magnetic, mechanical and thermal processes, as well as a number of nonlinear dependencies, we use the lumped parameters of the windings, and the solutions of the equations describing these processes are presented in a recurrent form. The mathematical model of the accelerator takes into account the variable magnetic coupling between the windings during the excitation of the inductor winding. When calculating the parameters and characteristics of the accelerator, a cyclic algorithm is used. Results. At a frequency of an alternating voltage source of 50 Hz, the current amplitude in the armature winding is less than in the inductor winding. With an increase in the source frequency to 250 Hz, the phase shift between the winding currents decreases. The current in the inductor winding decreases, and in the armature winding it increases. The accelerating components of the force increase, and the braking ones decrease. With an increase in the source frequency to 500 Hz, the current density in the armature winding exceeds that in the inductor winding. In this case, the phase shift between the windings is further reduced. Originality. When a cylindrical accelerator is excited, the largest amplitude of the current density in the inductor winding occurs at the maximum initial displacement of the windings, but the amplitude of the current density in the armature winding is the smallest. The largest value of the current density in the armature winding occurs in the absence of an initial displacement. When excited from a capacitive energy storage, the electrodynamic force between the windings has an initial accelerating and subsequent braking components. As a result, the speed of the armature initially increases to a maximum value, but decreases towards the end of the electromagnetic process. When a cylindrical accelerator is excited from an alternating voltage source, a phase shift occurs between the currents in the windings, which leads to the appearance of alternating accelerating and decelerating components of electrodynamic forces. The accelerating components of the force prevail over the braking components, which ensures the movement of the armature. Practical value. At a frequency of an alternating voltage source of 50 Hz, the highest speed at the output of the accelerator vzf=0.5 m/s is realized at an initial displacement of the windings z0=6.2 mm, at a frequency of 250 Hz, the highest speed vzf=2.4 m/s is realized at z0=3.1 mm, and at a frequency of 500 Hz the highest speed vzf=2.29 m/s is realized at z0=2.3 mm.

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Hybrid Multi-Physics Modeling of an Ultra-Fast Electro-Mechanical Actuator

Cited by 20 publications

References 21 publications

Thyristor Arc Eliminator for Protection of Low Voltage Electrical Equipment

Thyristor Arc Eliminator for Protection of Low Voltage Electrical Equipment

Influence of Geometrical Parameters of the Inductor and Armature on the Indicators of a Linear Pulse Electromechanical Converter of an Electrodynamic Type

Influence of the initial winding displacement on the indicators of the electromechanical induction accelerator of cylindrical configuration

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