Endüstride ve otomasyonda doğrusal hareket vazgeçilemez bir ihtiyaçtır. Söz konusu hareket dairesel çıktı üreten makinalara kayış, kasnak ve dişliler eklenerek temin edilmektedir. Ancak bu tür ...çözümler verim düşmesine ve maliyetlerin artmasına neden olmaktadır. Diğer taraftan lineer motorlar elektrik enerjisini doğrusal harekete direkt çeviren elektrik makinalarıdır. Lineer motorların endüstri ve otomasyon sistemlerinde fazla tercih edilmemesinin nedenleri ise düşük kuvvet/akım oranları ve uzunluk sınırlamalarıdır. Son yıllarda geliştirilen çift yanlı DC lineer motorda hem kuvvet/akım oranı artırılmış hem de uzunluk sınırlamasının önüne geçilmiştir. Bu çalışmada, çift yanlı DC lineer motorun öncelikle Ansys-Maxwell de detaylı nümerik analizleri yapılmıştır. Ayrıca ilgili motorun lineer olan tasarım topolojisi çember şekline dönüştürülerek, dairesel hareket üreten yeni bir elektrik motoru tasarlanmıştır. Geliştirilen ve çembersel motor olarak adlandırılan yeni motorun manyetik analizleri yapılmıştır. Elektrikli araçların tekerlekleri içerisine yerleştirilebilecek boyutta tasarlanan motorun moment/akım oranı analizleri yapılmıştır. Elde edilen sonuçlardan, tasarımı yapılan motorun teker içi kullanıma uygun olduğu, benzer amaçlı motorlara kıyasla tasarımı basit ve maliyeti düşük olduğu görülmüştür.
High-frequency transformers are becoming an essential component in the integration of power resources that rely on power electronic converters; their efficiency and performance are influenced by ...parasitic characteristics in the interface. In this article, the design of a high-frequency toroidal transformer has been explained in detail using the ANSYS Maxwell platform. Various parameters, such as leakage inductance, magnetic flux density, magnetic field strength and uniform magnetic flux line are analyzed using Finite element analysis. High-frequency transformers using a toroidal core with different winding configurations are examined and all parameters obtained through simulation are validated by an analytical approach. Analysis of each design is based on its leakage inductances, which will aid in the appropriate selection of transformers as a function of their operating frequency. This analysis is expected to guide designers to optimize the high-frequency transformer parameters based on practical applications. The optimized parameters are then applied for a dual active bridge (DAB) converter within MATLAB/Simulink to verify the design process. A prototype has been built to validate the simulation and design procedure. The results obtained from both simulation and experiments are compared and show great correlation.
The use of wind energy as an alternative source of energy to generate the electricity is increasing worldwide. The application of an axial flux permanent magnet generator for small-scale wind turbine ...nowadays is increasing due to innovation, new material discoveries and completion in the manufacturing technology. The axial flux machines can be constructed with single-side, double-side and multi-stage topologies and can also be constructed with or without an iron core. Nine possible patterns between the single-side and double-side topologies with iron core and with surface-mounted permanent magnet method were designed in this study with the aid of the analytical method. To obtain the most qualified generator, there are six parameters used as constraints including flux density distribution, on-load terminal voltage, voltage regulation, total harmonic distortion, output power, and efficiency and analyzed with the finite element method from Maxwell-3D software. From the comparison, the generator type IX excited with rectangular poles is proven to be the most qualified generator among other generators in this case.
The sample environment is essential to neutron scattering experiments as it induces the sample under study into a phase or state of particular interest. Various sample environments have been ...developed, yet the high-voltage electric field has rarely been documented. In this study, Bruce electrodes with various sectional geometries and chamber sizes were examined by using simulation modeling based on ANSYS Maxwell. A large uniform field region where samples would sit could be achieved in the planar region for all specifications, but the size of the region and the field strength varied with the gap distance between electrodes. The edging effect was inherently observed even for bare electrodes, about 1.7% higher in the sinusoidal region than the planar region, and was significantly deteriorated when a chamber was applied. This effect, however, presented an exponential decrease as the minimum distance between the electrode edge and the chamber shell increased. A compromise between the spatial confinement and the achievable field (strength and uniform region) could be reached according to the unique applicability of neutron instruments. This research provides a theoretical basis for the subsequent design and manufacturing of high-voltage sample environment devices.
The problem of developing optimal-design electromagnetic valves is relevant for many industries. The development of technology is characterized by increased power and pressures used for actuator ...mechanisms, as well as by reducing the dimensions and mass of automatic units. The goal of this article is to develop an advanced electromagnetic valve that would ensure optimal combination of high performance, reliability, technological effectiveness and minimal cost. On the basis of standard dependences for electromagnetic phenomena a mathematic model of a SU.1 valve was developed. It was calculated in several special-purpose software packages: NISA, FEMM, ANSYS Maxwell. Parametric analysis was implemented in ANSYS Maxwell for variable working gap settings and values of current force in the solenoid. As a result, the magnetic induction distribution field was obtained. The results of modeling the operation of the electromagnetic valve and the magnetic induction distribution field are presented for variable working gap settings and different values of current force in the solenoid. The model of an advanced electromagnetic valve for a liquid rocket engine was developed on the basis of the dependences obtained. The duration of single engine firing obtained is 40 msec. The results obtained make it possible to create a valve with hold-open time of 800msec, which is considered sufficient for application in electromagnetic direct current valves.
Electric vehicles (EVs) can be charged wirelessly using inductive charging technology. This process has a number of advantages in terms of automation, safety in harsh environments, reliability in the ...event of natural disasters and adaptability. On the other hand, the inductive charger has many issues, including a complex design, sensitivity to misalignment, safety concerns, and a high cost. The transmitting and receiving coils are the primary causes of the cited problems. This paper presents an in-depth study of an electric vehicle charging system based on the magnetic coupling between two coils by introducing different materials to concentrate the magnetic flux and hence improving the overall efficiency of the charging system and its design. Three situations of the magnetic coupling between two identical rectangular coils as a function of both the horizontal (X axis) and vertical (Z axis) alignment are examined. In the first case, the analysis of the magnetic coupling between two copper coils separated by an air gap is presented. The results show that the magnitude of the fields decreases according to the distance between the transmitter and the receiver coils and the obtained coupling coefficient was very low with a high leakage flux which affected the performance of the charging system. In the second case, a straightforward shielding method that involves inserting a magnetic material of the ferrite type is proposed to overcome these problems. The use of ferrite magnetic shielding contributes to channeling the field lines as well as reducing leakage flux which makes the transmitted power higher. This perspective shows that simple shielding is still only a partial and insufficient solution. In the third situation, an aluminum sheet was consequently placed on the top of the ferrite to provide an adequate shielding structure. A 3D analysis of the self and mutual induction parameters separating the two coils as well as a magnetic field is also performed using the Ansys Maxwell software. The results highlight the significance of the enhanced proposed design.
Dry type transformers are widely used in medium and low voltage distribution network such as renewable energy system. However, these transformers have some drawbacks related to dimension, cost and ...efficiency depending on it. Thus, the main aim of this study is to get the optimum transformer design based on winding size and efficiency that are related to transformer long lasting with low loss. Therefore, transformer manufacturers will produce more efficient and long lasting dry-type transformer. First of all, the mathematical model of the single-phase dry-type transformer is qualified in detail so the transformer parameters are obtained. Secondly, optimum efficiency depending on the winding sizes, C coefficient and losses are evaluated by Firefly algorithm (FA). Thirdly, the electromagnetic transient analysis of the dry-type transformer have done by ANSYS/Maxwell program. Fourthly, thermal analysis of the transformer windings and core are done by PLC measurement station. Finally, the theoretical results are validated by experimental results using a prototype set. The obtained results showed that the optimization based on windings size and efficiency is resulted by increasing the durability and reliability of the transformer. This article aims to provide a broad perspective to transformer designers, manufacturers and application engineers dealing with these issues.
In this study, the design, simulation and construction of three micro pattern gas-detectors, THGEM, with different geometric dimensions are presented. Moreover, their ability of operation in SQS mode ...to determine the incident rays position without using any conventional imaging system is investigated. In the presence of UV absorbing gas mixtures, the proportional mode of the gas detector operation is followed by SQS mode as soon as the visible light column appears at the ray entrance location. In the method employed, each THGEM hole as an image pixel independent of other holes can operate in SQS mode with emerging a light column.
As a consequence, it can be used for alpha beam imaging since the brightness of each hole at a certain voltage is proportional to the number of primary electrons entering the hole.
In this article, a wireless power transfer (WPT) system with a single transmitter to power multiple electronic loads simultaneously using multiple receivers is proposed. We analyzed various types of ...coil geometries on the receiver side, including circular, square, hexagonal and octagonal shapes. Then, employing the finite element analysis (FEA) method with the ANSYS MAXWELL simulation tool, we identified the most efficient coil design system based on parameters, such as self-inductance, mutual inductance and coefficient of coupling factor. Subsequently, the electrical parameters necessary for the proposed concept were calculated from the equivalent circuit model and simulation of the proposed model was performed using the LT-Spice simulation tool. An 85 kHz resonant frequency was achieved using a high-frequency inverter (HFI), and inductor-capacitor-capacitor (LCC) compensation topologies were employed to provide different power capabilities to the loads.
Active magnetic bearing (AMB) has drawn such a significant amount of consideration in the rotating machinery industry because of its advantages against conventional bearing such as rolling cement ...bearing, fluid film, etc. AMBs introduce subsidiary features to the high-speed system, such as remove friction loss, reduce maintenance. This manuscript describes a novel, simplified, and economical design, analysis, and hardware implementation of single-coil I-type active magnetic bearing for high-speed application. Two types of controllers have been for the proposed system for the 10 mm air gap, one for sensing the position and another for sensing the current. A 3D finite element model of the AMB system is built. Then the magnetic analysis is performed under different conditions and the attractive force characteristics for this proposed system have been analyzed by the 3D finite element method. In the test setup speed of AMB is compared with conventional bearing. From the test result, it is observed that the designed magnetic bearing meets the high-speed application criteria.
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