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Tytuł:
Anisotropy component of electromagnetic force and torque
Autorzy:
Spałek, D.
Powiązania:
https://bibliotekanauki.pl/articles/199912.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
anisotropy component
electromagnetic force
electromagnetic torque
Opis:
The paper deals with the problem of surface-integral representation of electromagnetic force/torque for magnetically anisotropic region. It is pointed out that in some anisotropic regions a component of electromagnetic force/torque appears - the so-called anisotropy component. The total electromagnetic field force/torque calculated with the help of Maxwell’s and Lorentz’s methods could lead to the different values for some anisotropic medium (homogeneous, without hysteresis). The coenergy method is used to evaluate total force/torque too. Analytical calculations of force/torque for isotropic and anisotropic media in electromagnetic field are presented. The condition for surface integral representation of Lorentz’s either force or torque is formulated.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2010, 58, 1; 107-117
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Checkweigher using an EMFC weighing cell with magnetic springs and air-bearings
Autorzy:
Lee, Hyun-Ho
Yoon, Kyung-Taek
Choi, Young-Man
Powiązania:
https://bibliotekanauki.pl/articles/1849107.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
checkweigher
magnetic spring
electromagnetic force compensation
Opis:
A dynamic weighing system or a checkweigher is an automated inspection system that measures the weight of objects while transferring them between processes. In our previous study, we developed a new electromagnetic force compensation (EMFC) weighing cell using magnetic springs and air bearings. This weighing cell is free from flexure hinges which are vulnerable to shock and fatigue and also eliminates the resonance characteristics and implements a very low stiffness of only a few N/m due to the nature of the Halbach array magnetic spring. In this study, we implemented a checkweigher with the weighing cell including a loading and unloading conveyor to evaluate its dynamic weighing performances. The magnetic springs are optimized and re-designed to compensate for the weight of a weighing conveyor on the weighing cell. The checkweigher has a weighing repeatability of 23 mg (1σ) in static situation. Since there is no low-frequency resonance in our checkweigher that influences the dynamic weighing signal, we could measure the weight by using only a notch filter at high conveyor speeds. To determine the effective measurement time, a dynamic weighing process model is used. Finally, the proposed checkweigher meets Class XIII of OIML R51-1 of verification scale e 0.5 g at a conveyor speed of up to 2.7 m/s.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 465-478
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Checkweigher using an EMFC weighing cell with magnetic springs and air-bearings
Autorzy:
Lee, Hyun-Ho
Yoon, Kyung-Taek
Choi, Young-Man
Powiązania:
https://bibliotekanauki.pl/articles/1849003.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
checkweigher
magnetic spring
electromagnetic force compensation
Opis:
A dynamic weighing system or a checkweigher is an automated inspection system that measures the weight of objects while transferring them between processes. In our previous study, we developed a new electromagnetic force compensation (EMFC) weighing cell using magnetic springs and air bearings. This weighing cell is free from flexure hinges which are vulnerable to shock and fatigue and also eliminates the resonance characteristics and implements a very low stiffness of only a few N/m due to the nature of the Halbach array magnetic spring. In this study, we implemented a checkweigher with the weighing cell including a loading and unloading conveyor to evaluate its dynamic weighing performances. The magnetic springs are optimized and re-designed to compensate for the weight of a weighing conveyor on the weighing cell. The checkweigher has a weighing repeatability of 23 mg (1σ) in static situation. Since there is no low-frequency resonance in our checkweigher that influences the dynamic weighing signal, we could measure the weight by using only a notch filter at high conveyor speeds. To determine the effective measurement time, a dynamic weighing process model is used. Finally, the proposed checkweigher meets Class XIII of OIML R51-1 of verification scale e 0.5 g at a conveyor speed of up to 2.7 m/s.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 465-478
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Checkweigher using an EMFC weighing cell with magnetic springs and air-bearings
Autorzy:
Lee, Hyun-Ho
Yoon, Kyung-Taek
Choi, Young-Man
Powiązania:
https://bibliotekanauki.pl/articles/1849051.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
checkweigher
magnetic spring
electromagnetic force compensation
Opis:
A dynamic weighing system or a checkweigher is an automated inspection system that measures the weight of objects while transferring them between processes. In our previous study, we developed a new electromagnetic force compensation (EMFC) weighing cell using magnetic springs and air bearings. This weighing cell is free from flexure hinges which are vulnerable to shock and fatigue and also eliminates the resonance characteristics and implements a very low stiffness of only a few N/m due to the nature of the Halbach array magnetic spring. In this study, we implemented a checkweigher with the weighing cell including a loading and unloading conveyor to evaluate its dynamic weighing performances. The magnetic springs are optimized and re-designed to compensate for the weight of a weighing conveyor on the weighing cell. The checkweigher has a weighing repeatability of 23 mg (1σ) in static situation. Since there is no low-frequency resonance in our checkweigher that influences the dynamic weighing signal, we could measure the weight by using only a notch filter at high conveyor speeds. To determine the effective measurement time, a dynamic weighing process model is used. Finally, the proposed checkweigher meets Class XIII of OIML R51-1 of verification scale e 0.5 g at a conveyor speed of up to 2.7 m/s.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 465-478
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of consciousness and contemporary physics
Autorzy:
Di Sia, Paolo
Bhadra, Narayan Kumar
Powiązania:
https://bibliotekanauki.pl/articles/1031926.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
B-DS model
Consciousness
Contemporary Physics
Cosmology
Electromagnetic Force
Light
Universe
Opis:
All great religions used the light as a symbol of transcendence and characteristic of divinity, talking about “divine spark that is inside us”. Light indicates the life; the symbol of light pervades the Bible from the first to the last page, it is the principle of creation. God has been called in various ways, but the light is the metaphor used to talk about His nature. From the point of view of physics, the light is an electromagnetic wave; the electromagnetic force is one of the four fundamental forces known today. Recent insights consider our physical universe as appeared by a phase-like transition from a universe with 10 space-time dimensions. Relatively to a new appeared model, called B-DS model, consciousness would be created by the electromagnetic field in relation to the SU(6) x U(1) symmetry group. The human brain is conceived as an interface organ receiving informations, an element of interference from incoming data and already existing data (the subject’s memory).
Źródło:
World Scientific News; 2020, 140; 127-138
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Digital Model of the Electrodynamic Acceleration Process in a Coil Gun Device
Cyfrowy model procesu elektrodynamicznej akceleracji w urządzeniu typu Coil Gun
Autorzy:
Horodeński, A. W.
Pochrybniak, C.
Powiązania:
https://bibliotekanauki.pl/articles/403260.pdf
Data publikacji:
2018
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
Coil Gun
acceleration
electromagnetic force
coil
propulsion
electromagnetism
cewka
miotanie
siła elektromagnetyczna
Opis:
The subject of this paper is an analysis of the process of applying kinetic energy to a projectile made from a non-magnetic, electrically conductive material and placed inside of an inductance coil live with alternating current. A digital model of an acceleration system was built, comprising a high-current coil and a cylindrical projectile located inside of the coil. Analytical formulas of the three-dimensional distribution of the axial and radial components of the magnetic field generated by the coil were applied [1]. The mathematical model described herein included the projectile and coil three-dimensional system (with the dimensions and distribution of the coil turns), the parameters of the power supply system and their variations, caused by the energy input to the projectile (and including the variation of: coupling coefficient, pulsation, coefficient of attenuation, inductance, and resistance), and the balance of momentum of the projectile and coil system. A system of equations which depicted the projectile and coil system (the law of electromagnetic induction, the Biot-Savart law, electric-to-kinetic energy transfer, and the balance of momentum of the projectile and coil system) was solved with numerical methods. The conclusions relevant to the design and technology of an ICG (Inductance Coil Gun), derived from the foregoing numerical analysis, were experimentally verified. Initial calculations were completed to optimise the acceleration process. The acceleration efficiency in a cascade of 10 coils was calculated.
Przedmiotem pracy jest analiza procesu nadawania energii kinetycznej pociskowi wykonanemu z niemagnetycznego materiału przewodzącego, umieszczonemu wewnątrz cewki, przez którą płynie prąd zmienny. Zbudowano model cyfrowy układu akceleracyjnego złożonego z wysokoprądowej cewki oraz umieszczonego wewnątrz niej metalicznego pocisku w kształcie walca. Wykorzystano analityczne wzory na przestrzenny rozkład składowej osiowej i radialnej pola magnetycznego wytwarzanego przez cewkę [5]. Model matematyczny uwzględnia układ przestrzenny cewka-pocisk (wymiary oraz rozkład zwojów cewki), parametry układu zasilającego z uwzględnieniem ich zmienności w czasie spowodowanej przekazem energii do pocisku, w tym zmienność współczynnika sprzężenia, pulsacji, współczynnika tłumienia, indukcyjności i oporności, a także bilans pędu układu cewka-pocisk. Układ równań opisujący układ (prawo indukcji elektromagnetycznej, prawo Biota-Savarta, przemiana energii elektrycznej w kinetyczną, bilans pędu układu cewka-pocisk) rozwiązano metodami numerycznymi. Dokonano eksperymentalnej weryfikacji płynących z analizy wniosków istotnych z punktu widzenia konstrukcji i technologii urządzenia miotającego typu Inductance Coil Gun (ICG). Wykonano wstępne obliczenia mające na celu optymalizację procesu akceleracji. Przeprowadzono także obliczenia wydajności akceleracji w kaskadzie złożonej z 10 cewek.
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2018, 9, 4 (34); 113-126
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electromagnetic locking devices of car handling units
Autorzy:
Hrabovský, Leopold
Fedorko, Gabriel
Mlýnek, Lukáš
Michalik, Peter
Powiązania:
https://bibliotekanauki.pl/articles/2091133.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
electromagnetic force
testing device
braking of manipulation units
siła elektromagnetyczna
urządzenie testujące
Opis:
This paper contains the design of a testing device, which was constructed for the purposes of checking functional properties of the innovative solutions of variants of electromagnetic locking devices with potentials of replacing current mechanical brakes used for stopping pallets with loaded cars in parking houses developed by the company KOMA - Industry s.r.o. The testing device consists of two positioning tables, whose moveable parts are anchored perpendicular to each other in the frame of the testing device. An electromagnet and a solenoid generating the force needed for stopping the motion of the pallet is connected to the moveable part of the upright positioning table. The brake ramp made of a ferromagnetic material has a hole at its top surface into which the pin of the solenoid is inserted and is attached to the horizontal moveable part of the positioning table. This paper presents holding force values of the electromagnet, which were obtained by experimental measuring on the created testing unit.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2020, 107; 73--83
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computation of electromagnetic forces in the windings of amorphous core transformers
Autorzy:
Thanh, Bao Doan
Tung, Doan Duc
Le, Tuan-Ho
Powiązania:
https://bibliotekanauki.pl/articles/24202732.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
amorphous transformer
electromagnetic force
leakage flux
magnetic vector potential formulation
short-circuit current
Opis:
Electromagnetic forces generated by the short circuit current and leakage flux in low- and high-voltage windings of distribution transformers as well as amorphous core transformers will cause the translation, destruction, and explosion of the windings. Thus, the investigation of these forces plays a significant role for researchers and manufacturers. Many authors have recently used the finite element method to analyze electromagnetic forces. In this paper, an analytic model is first developed for magnetic vector potential formulations to compute the electromagnetic forces (i.e., axial and radial forces) acting on the low- and high-voltage windings of an amorphous core transformer. The finite element technique is then presented to validate the results obtained from the analytical model. The developed model is applied to an actual problem.
Źródło:
Archives of Electrical Engineering; 2023, 72, 2; 521--539
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two theorems about Lorentz method for asymmetrical anisotropic regions
Autorzy:
Spałek, D.
Powiązania:
https://bibliotekanauki.pl/articles/200154.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
asymmetrical magnetic anisotropy
electromagnetic force and torque
models of electromechanical converters for benchmarks
Opis:
The paper has dealt with two theoretical problems of calculation of electromagnetic force or torque. The first problem considers the magnetically anisotropic and conductive region. The theorem about equivalence of both Maxwell and Lorentz methods has been presented. The second problem deals with the independence from the integration surface of force or torque calculated by the Maxwell method. The second theorem which presents the sufficient condition for an independence problem in the anisotropic and nonconductive region has been formulated.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2013, 61, 2; 399-404
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating a Process of Accelerating Macroscopic Objects in an Eddy-Current Inductance Coil Magnetic Field
Badanie procesu akceleracji obiektów makroskopowych w polu magnetycznym cewki indukcyjnej z wykorzystaniem prądów wirowych
Autorzy:
Horodeński, A.
Pochrybniak, C.
Namyślak, K.
Powiązania:
https://bibliotekanauki.pl/articles/403484.pdf
Data publikacji:
2017
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
mechanics
coil gun
acceleration
electromagnetic force
coil
propulsion
electromagnetism
mechanika
cewka
miotanie
siła elektromagnetyczna
Opis:
The subject of this paper is an analysis of the process of applying kinetic energy to a projectile made of non-magnetic electrically conductive material and located inside an induction coil live with alternating current. An experimental verification was carried out of the analytical conclusions that were pertinent to the design and technology of an inductance coil gun, which is a ranged weapon type.
Przedmiotem pracy jest analiza procesu nadawania energii kinetycznej pociskowi wykonanemu z niemagnetycznego materiału przewodzącego, umieszczonemu wewnątrz cewki, przez którą płynie prąd zmienny. Dokonano eksperymentalnej weryfikacji płynących z analizy wniosków istotnych z punktu widzenia konstrukcji i technologii urządzenia miotającego typu Inductance Coil Gun (ICG).
Źródło:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2017, 8, 1 (27); 115-128
2081-5891
Pojawia się w:
Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 19

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