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The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are:
- Physics and mechanics of electromagnetic materials and devices
- Computational electromagnetic in materials and devices
- Applications of electromagnetic fields and forces
The three interrelated key subjects - materials, electromagnetics and mechanics - include the following aspects: control, micromachines, intelligent structure, inverse problem, eddy current analysis, electromagnetic NDE, magnetic materials, magnetoelastic effects in materials, bioelectromagnetics, magnetosolid mechanics, magnetic levitations, applied physics of superconductors, superconducting magnet technology, superconducting propulsion system, nuclear fusion reactor components and wave propagation in electromagnetic fields.
Authors: Seo, Un-Jae | Chun, Yon-do | Choi, Jae-Hak | Han, Pil-Wan | Koo, Dae-Hyun
Article Type: Research Article
Abstract: One of the major problems associated with interior permanent magnet machines is torque ripple, a problem that causes undesirable noise and possibly speed ripples. In this paper, rotor shaping near q-axis and its effects for torque ripple reduction are analyzed. Two new design variables are introduced for shaping the rotor pole. To verify the trade-off relationship between average torque and torque ripple by rotor pole shaping, the multi-objective optimization algorithm is employed to search the Pareto …front of the problems. All results are obtained from 2D finite element analysis. The simulation results on two different lead angles are compared and the effect of rotor pole shaping is observed. Show more
Keywords: Pole shaping, torque ripple, EGO, MOEA, IPM
DOI: 10.3233/JAE-2012-1555
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 881-887, 2012
Authors: Di Barba, Paolo | Mognaschi, Maria Evelina | Palka, Ryszard | Paplicki, Piotr | Szkolny, Sebastian
Article Type: Research Article
Abstract: The paper deals with the automated optimal design of a new synchronous motor particularly suitable for electric vehicles. Identifying the shape of rotor pole and excitation magnets, minimizing the mass/volume and simultaneously maximizing the torque, is the main design goal. The formulation of this problem in terms of a bi-objective optimal shape design problem possibly stimulates the identification of unexplored solutions of practical significance.
Keywords: Electric vehicles, permanent-magnet excited synchronous machines, shape optimization of electrical machines, 3D finite element analysis
DOI: 10.3233/JAE-2012-1556
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 889-895, 2012
Authors: Han, Pil-Wan | Chun, Yon-Do | Choi, Jae-Hak | Seo, Un-Jae | Koo, Dae-Yun | Lee, Ju | Lee, Won-Goo
Article Type: Research Article
Abstract: A copper die casting motor (CDM) has better design flexibility than an aluminum die casting motor (ADM) because of the higher conductivity of copper. However, CDM has an economic and manufacturing weak point due to the high cost of copper and its high melting temperature compared to aluminium. This paper describes a comparison of the design parameters, specifications, performances and material cost between CDM and ADM of 2.2 kW_4P, 5.5 kW_4P, 7.5 kW_4P.
Keywords: High-efficiency, cost, copper, aluminum
DOI: 10.3233/JAE-2012-1557
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 897-903, 2012
Authors: Gofuku, Akio | Sasaki, Ryo | Yano, Tomoaki | Wada, Yosuke | Shibata, Mitsunobu
Article Type: Research Article
Abstract: Spherical motors have an advantageous feature that they can rotate around multiple axes. From the advantage, spherical motors are expected to be applied to driving mechanisms of holonomic mobile robots, joints of robots, and so on. This study develops a spherical motor called 14–12 spherical stepping motor that can rotate around 6 axes. This paper describes the structure of the motor, rotation principle by five-phase ACs (Alternative Currents), a five-phase AC power supply, and rotation experiments …to confirm the applicability of the motor. Show more
Keywords: Spherical motor, stepping motor, five-phase alternative current
DOI: 10.3233/JAE-2012-1558
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 905-911, 2012
Authors: Oonishi, Atsurou | Hirata, Katsuhiro | Yoo, Byungjin | Niguchi, Noboru
Article Type: Research Article
Abstract: This paper deals with the frequency response characteristics of a magnetically controlled shape memory alloy (MSMA) linear actuator made by NiMnGa alloy under external magnetic field. In order to predict the strain actuation of the linear actuator induced by external magnetic field at variable drive frequency, a new computational analysis method using finite element method (FEM) was proposed. The frequency response characteristics of the prototype linear actuator exhibited good agreement with the result of the …proposed analysis method. Show more
Keywords: Magnetic shape memory alloy, finite element method, linear actuator
DOI: 10.3233/JAE-2012-1559
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 913-918, 2012
Authors: Zhu, Yu-Wu | Wang, Dao-Han | Lee, Sang-Geon | Cho, Yun-Hyun
Article Type: Research Article
Abstract: This paper proposes a space vector control of permanent magnet synchronous machine (PMSM) based on Hall effect sensor, which is very useful in practical applications due to the exactly same hardware structures between PMSM and brushless DC (BLDC) machine. This proposed method can be considered as an intermediate stage of development between the general incremental encoder based and sensorless based PMSM control methods. Because the Hall effect sensor is an absolute position sensor with 60-degree resolution, …the position initialization process is not needed and the reversal rotation risk can be avoided. To improve resolution the interpolation method implemented by software is employed. Finally the high performance of this proposed method is validated by some experimental results. Show more
Keywords: Permanent magnet synchronous machine, space vector PWM, Hall effect sensor
DOI: 10.3233/JAE-2012-1560
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 919-924, 2012
Authors: Rhyu, Se-Hyun | Lee, Jeong-Jong | Kim, Young-Kyoun | Kim, Byung-Taek | Kim, Dae-Kyong
Article Type: Research Article
Abstract: This paper investigates the performance of the line start permanent magnet (LSPM) motor which needs a high efficiency characteristic in a wide operation region. LSPM motor's performance indexes, such as efficiency, motor current, load angle and synchronous torque, have complex relationship with each other according to the main and auxiliary windings distribution, and the selection of running capacitor. The output characteristics can be defined by the winding structure which is calculated by d-q equivalent circuit and …finite element method. The efficiency characteristic is verified by simulation as well as by experiment on the designed LSPM motor. From the results, we show that the redesigned model considering the winding structure and capacitor matching has a wide operating region. Show more
Keywords: Line start permanent magnet(LSPM) motor, compressor, efficiency
DOI: 10.3233/JAE-2012-1561
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 925-931, 2012
Authors: Putek, Piotr | Slodička, Marian | Paplicki, Piotr | Pałka, Ryszard
Article Type: Research Article
Abstract: The paper presents an application of the topological derivative and continuum sensitivity analysis for the optimal design of the permanent magnet excited machines with the adjustable excitation. In our work we applied a topological optimization in order to find a general shape of rotor poles consisted of an iron and magnet part. An essential advantage of the proposed method is its numerical effectiveness. In order to verify results, three-dimensional models were developed and thoroughly analyzed. As …presented in the comparative analysis of 3D results, the applied method lead to the significant reduction of both, the cogging torque and a level of higher harmonics in the voltage induced in the armature windings. Show more
Keywords: Permanent magnet excited synchronous machines, cogging torque, shape optimization of rotor poles, topology derivative, sensitivity analysis
DOI: 10.3233/JAE-2012-1562
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 933-940, 2012
Authors: Amano, Ryosuke | Gotanda, Hiroki | Sugiura, Toshihiko
Article Type: Research Article
Abstract: Magnetic bearings can support rotating rotors without any contacts. So it is possible to rotate a rotor at extremely high rotational speed. On the other hand, they can easily show elastic deformation with nonlinear oscillation, which is complicated and difficult to deal with. This study investigates nonlinear coupling of oscillation modes appearing in such a flexible rotor system with a magnetic bearing, by considering both the nonlinearity of the electromagnetic force and the continuousness of the …rotor. First, an essential model of a rotor with an elastic shaft supported by a magnetic bearing was introduced. The numerical results indicate occurrence of internal resonance caused by the nonlinear coupling of the modes, if the ratio of their natural frequencies is 1 to 3 Experiments were also carried out and obtained results showed qualitative accordance to the numerical results. Show more
Keywords: Flywheel, magnetic bearings, nonlinear coupling, elasticity
DOI: 10.3233/JAE-2012-1563
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 941-948, 2012
Authors: Yang, Baokun | Zheng, Hongbing | Yan, Guirong
Article Type: Research Article
Abstract: A gyroscope motor is a precision component widely used in aerospace, aviation and other fields. Its accuracy is very sensitive to vibration. Vibration can also cause changes in the air-gap magnetic field in addition to changes due to the electromagnetic force. This paper presents a numerical simulation method for analyzing the electromagnetic characteristics of the gyroscope motor air gap subject to the coupled electromagnetic force and mechanical vibration. It analyzes the magnetic field in the gap …in the axial and circumferential directions using a finite element method model, and then analyzes the magnetic characteristics of the gyroscope motor air gap subject to the coupled electromagnetic force and vibration. The method can be used to estimate the electromagnetic vibration to optimize the design of a gyroscope motor and extend its life. Show more
Keywords: Electromagnetic, vibration, gyroscope motor, coupled
DOI: 10.3233/JAE-2012-1564
Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 39, no. 1-4, pp. 949-955, 2012
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