• 제목/요약/키워드: Electromagnetic Finite Element Analysis

검색결과 448건 처리시간 0.021초

정자계의 유한요소해석을 위한 병렬계산 (Parallel Computations for Finite Element Analysis of Magnetostatic Fields)

  • 김근환;최경;이기식;한송엽
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1991년도 추계학술대회 논문집 학회본부
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    • pp.87-90
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    • 1991
  • In the field of structural analysis so-called substructure methods have been applied extensively to solve large and complex structures by splitting them up in substructures. This substructure method is applicable to electromagnetic field analysis and highly parallel in nature. In this paper substructure FEM is implemented for magnetostatic field computation using parallel computer consists of many transputers. Parallel substructure method is a promising tool as a solution of not only compuation speed problem but also memory problem.

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3차원 와전류 해석을 위한 등가자기회로방법의 개발 (Development of Equivalent Magnetic Circuit Network Method for 3 Dimentional Eddy current Analysis)

  • 허진;홍정표;현동석
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제51권5호
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    • pp.228-233
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    • 2002
  • A computational method for analysis of the 3 dimensional electro-magnetic induction problems has been developed. The developed method is capable of modeling the induced current and analyzing its characteristics using only scalar Potential at each node. A benchmark model of asymmetrical conductor with a hole is analyzed to verify the application of the developed method. The calculated value of magnetic flux density are compared with the measured value, and the results indicate that the developed method is valid. Also, Comparing with 3-D finite element method (FEM) results, we conformed effectiveness of the developed method for the accuracy and computation times.

300마력급 초고속 전동기의 스러스트 자기 베어링/댐퍼 설계 및 특성해석 (Design and Analysis of Thrust Magnetic Bearing/Damper for 300HP Class High Speed Motor)

  • 장석명;최장영;박지훈;이용복;이희섭
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.5-7
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    • 2007
  • This paper deals with design and analysis of thrust magnetic bearing for 300HP class high speed motor. Using the solutions obtained from equivalent magnetic circuits, we predicts the electromagnetic characteristics such as thrust, time constant and power loss according to design parameters. And then, using non-linear finite element analysis, a detailed design is performed considering saturation in order to meet requirements.

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Effect of Axial-Layered Permanent-Magnet on Operating Temperature in Outer Rotor Machine

  • Luu, Phuong Thi;Lee, Ji-Young;Kim, Ji-Won;Chun, Yon-Do;Oh, Hong-Seok
    • Journal of Electrical Engineering and Technology
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    • 제13권6호
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    • pp.2329-2334
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    • 2018
  • This paper discusses the thermal effect of the number of permanent-magnet (PM) layers in an outer rotor machine. Depending on the number of axial-layer of PM, the operating temperature is compared analytically and experimentally. The electromagnetic analysis is performed using 3-dimensional time varying finite element method to get the heat sources depending on axial-layered PM models. Then thermal analysis is conducted using the lumped-parameter-thermal-network method for each case. Two outer rotor machines, which have the different number of axial-layer of PM, are manufactured and tested to validate the analysis results.

휴대음성장치용 골도 진동자 개발 (Development of a Bone Conduction Vibrator for Portable Acoustic Device)

  • 김광석;방기창;황건용;황상문
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2008년도 춘계학술대회논문집
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    • pp.613-617
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    • 2008
  • One of the important parts on multimedia era is acoustic ones. With increased demand of smallest multimedia products such as personal digital assistant (PDA) and mobile phones, it is necessary to develop acoustic devices which have higher performance and smaller size. Acoustic parts with various function for hearing impaired persons. This paper introduces a bone conduction vibrator (BCV) for hearing impaired persons to use portable acoustic device without additional devices. For vibration analysis of the BCV, electromagnetic, mechanical and their coupling effects are considered for the analysis. This paper shows that the development of design and analysis technique by finite element method (FEM) of BCV.

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화력 발전용 발전기 고정자 프레임의 모드매개변수 규명 (Modal Parameter Identification of a Generator Stator Frame for Fossil Power Plants)

  • 김철홍;류석주;박종포
    • 소음진동
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    • 제9권3호
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    • pp.570-576
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    • 1999
  • This paper presents numerical and experimental results of modal parameter identification in a generator stator frame for 500 MW fossil power plants. A commercial finite element analysis S/W was employed for modal analysis. The generator is excited by alternating electromagnetic forces, mainly of 120 Hz in 60 Hz machines, due to magnetic field and electric current in windings. It is necessary to verify that the stator frame has adequate frequency margin from the excitation frequency to avoid possible resonance when operating. Thus, frequency margin required for the stator frame is established using the numerical and experimental results. The results show that the stator frame meets the frequency-margin requirements. Also, results of modal analysis for design modification in order to reduce weights of the stator frame without deteriorating vibration characteristics are presented.

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A Study on the Analysis vibration of fluid flow in ECV

  • WANGWENHAI, WANGWENHAI;Cho, Haeng Muk
    • 에너지공학
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    • 제24권2호
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    • pp.115-119
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    • 2015
  • Pipe vibration caused great threat to the safety in production. Strong pipeline vibration will line accessories, especially the joints and pipe fittings etc. pipe joints loosening and rupture, causing serious accidents. By the action of the compressor constant fluid flow within the pipe, this process produces pulsating fluid flow may cause vibration of the pipe, thereby reducing the efficiency of the pipeline, structural vibration induced fatigue, thereby resulting in even piping structural damage. This paper studies on the vibration problems caused by fluid, by analyzing the causes of pipeline vibration and factors affecting pipeline vibrations, FEM (Finite Element Method) analysis of modal and enforced vibration.

A Novel Region Decision Method with Mesh Adaptive Direct Search Applied to Optimal FEA-Based Design of Interior PM Generator

  • Lee, Dongsu;Son, Byung Kwan;Kim, Jong-Wook;Jung, Sang-Yong
    • Journal of Electrical Engineering and Technology
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    • 제13권4호
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    • pp.1549-1557
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    • 2018
  • Optimizing the design of large-scale electric machines based on nonlinear finite element analysis (FEA) requires longer computation time than other applications of FEA, mainly due to the huge size of the machines. This paper addresses a new region decision method (RDM) with mesh adaptive direct search (MADS) for the optimal design of wind generators in order to reduce the computation time. The validity of the proposed algorithm is evaluated using Rastrigin and Goldstein-Price benchmark function. Moreover, the algorithm is employed for the optimal design of a 5.6MW interior permanent magnet synchronous generator to minimize the torque ripple. Additionally, mechanical stress analysis as well as electromagnetic field analysis have been implemented to prevent breakdown caused by large centrifugal forces of the modified design.

변압기 sheet권선 손실 및 온도 상승 해석 (Analysis of transformer sheet winding losses and temperature rise)

  • 김지현;김영만;노경철
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2005년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.23-25
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    • 2005
  • This paper describes analysis of transformer sheet winding losses and temperature rise. Sheet windings are used if transformer rating currents are so high that one meets current density limit on windings. Unlike stranded windings, sheet windings may be locally healed due to R direction flux. Winding losses with eddy current effect are calculated by finite element electromagnetic analysis and temperature rise is also calculated by Computational Fluid Dynamics (CFD) with loss result.

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Analysis and Experiments of the Linear Electrical Generator in Wave Energy Farm utilizing Resonance Power Buoy System

  • Park, Sang-Shin;Park, Se Myung;Jung, Jongkyo;Kim, Jin Ho
    • Journal of Magnetics
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    • 제18권3호
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    • pp.250-254
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    • 2013
  • In this research, the linear electrical generator in wave energy farm utilizing resonance power buoy system is studied. The mechanical resonance characteristics of the buoy and the wave are analyzed to maximize the kinetic energy in a relatively small wave energy area where WRPS is operated. In this research, we chose an analog model of the linear electrical generator of which size is one-hundredth of an actual size of it in WPRS (Wave energy farm utilizing Resonance Power buoy System) prior to verifying the characteristics of actual model of linear electrical generator in WRPS. In addition, the finite element analysis is conducted using commercial electromagnetic analysis software named MAXWELL to examine the electric characteristic of linear generator. Finally, for the verification of dynamic and electric characteristics of linear generator, the prototype was manufactured and the experiments to measure the displacement and the output electric power were performed.