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원가절감을 위한 산업용 고압 유도전동기의 다중목적 형상 최적 설계
김창업,김민석 대한전기학회 2023 전기학회논문지 Vol.72 No.12
This paper is a study on the optimum design of industrial high-voltage induction motor for cost reduction using shape optimization method while maintaining the performance and volume of original motor. Flux-InHouseTool-HyperStudy is used to demonstrate the optimal design process for an induction motor, including stator slot shape, rotor bar shape, stator winding redesign, temperature, etc. This considers design variables that satisfy the design range and constraints based on the optimal design process operating system. As for the objective function of the optimal design, the optimal values of iron core, copper material cost, efficiency, power factor, starting torque, starting current, rated torque, rated current, and maximum torque are determined through multipurpose optimization using the GRSM algorithm. Through this optimization method, cost reduction was reduced by 6.95% compared to the basic model.
유전알고리즘과 반응표면법을 이용한 BLDC 전동기용 영구자석 최적설계
김창업,전문호,Kim, Chang-Eob,Jeon, Mun-Ho 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.6
본 논문에서는 유전알고리즘, 반응표면법을 이용하여 BLDC 전동기의 코깅 토크를 최소화 하기 위한 최적화 설계 방법을 제안하였다. 유전알고리즘, 반응표면법을 이용하여 BLDC 전동기의 설계변수를 추론하고 유한요소법으로 코깅 토크를 구하였다. 유전알고리즘, 반응표면법을 유한요소법과 결합하여 사용함으로써 BLDC 전동기의 코깅 토크를 최소로 하는 영구자석의 형상을 보다 빠르고 정확하게 구할 수 있었다. In this paper, an optimum design method is presented for BLDC moor magnet using genetic algorithm(GA) and response surface method(RSM). The cogging torque is calculated by finite element method for the designs obtained by GA and RSM. The results are compared and discussed for the simulation time and the cogging torque.
김창업,김성수 신라대학교 자연과학연구소 2003 自然科學論文集 Vol.11 No.-
Measurements of the concentrations of individual exhaust hydrocarbon species have been made under various engine operating conditions with a 2-liter 4-cylinder engine for natural gas and LPG. Tests were performed at constant engine speed, 1800rpm for two compression ratios(8.6 and 10.6), with various operating parameters, such as excess air ratio(1.0~1.6), bmeps(250~800kPa) and spark timings(BTDC 10~55). It was found that the natural gas gave the less ozone formation than LPG in various operating conditions. This was accomplished by reducing the emissions of propylene(C_3H_6), which has relatively high MIR factor, and propane(C_3H_*) that originally has large portion of LPG. In addition, the natural gas show lower values in the SR and BSRs. Higher compression ratio showed higher NMHC emissions. However, SR decreased since fuel species of HC emissions increase. BSRs showed almost same values under high bmep, over 500kPa for both fuels. This means that effect of increasing of NMGC emissions and effect of decreasing of SRs with higher bmep affect each other simultaneously. With advanced spark timing, BSRs of LPG were increased while those of natural gas showed almost constant values.
김창업 한국수소및신에너지학회 2015 한국수소 및 신에너지학회논문집 Vol.26 No.1
In this study, characteristics of reforming process of automotive liquefied petroleum gas (LPG) fuel using plasma reactor are investigated. Because plasma reformer technology has advantages of a fast start-up and wide fuel/oxidizer ratio of operation, and reactor size is smaller and more simple compared to typical combustor and catalytic reactor, plasma reforming is suitable to the on-board vehicle reformer. To evaluate the characteristics of the reforming process, parametric effect of O2/C ratios, reactant flow rate and metal form on the process were investigated. In the test of varying O2/C ratio from partial oxidation to stoichiometry combustion, conversion of LPG was increased but selectivity of H2 decreased. The optimum condition of O2/C ratio for the highest H2 yield was determined to be around 1.0 for 20~50 lpm, and 1.35 for 100 lpm. Specific energy density (SED) was major factor in reforming process and higher SED leads to higher H2 yield. And metal form in the reformer increased H2 yield of about 34 % as compared to the case of no metal form. The result can be a guide to map optimal condition of reforming process.
선형유도전동기를 이용한 전자기 펌프의 특성해석 및 실험
김창업,전문호,권정태,임효재,Kim, Chang-Eob,Jeon, Mun-Ho,Kwon, Jeong-Tae,Lim, Hyo-Jae 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.6
본 논문에서는 선형유도전동기의 전자기력에 의해 용융 금속을 이송할 수 있는 전자기 펌프에 대하여 특성 해석 및 실험 결과에 대하여 제시하였다. 선형유도전동기에서 발생하는 전자기력과 전자수력학(MHD) 현상을 결합하여 용융 금속의 이송 특성을 해석하였다. 실험은 용융 아연을 대상으로 하였으며, 해석 결과와 비교 검토하였다. This paper presents the characteristics analysis and experiment of the electromagnetic pump using linear induction motor(LIM Pump) which can transfer the molten metals by the electromagnetic force. The characteristics of LIM Pump are analysed solving the magneto-hydro-dynamic(MHD) equation at various magnetic flux. The molten zinc is used in the experiment and the results we compared with the analysis.
金昌業 湖西大學校工業技術硏究所 1999 工業技術硏究所論文集 Vol.18 No.-
Recently DVD(Digital Versatile Disk) has been used in many areas. This paper presents new type of rotor magnet for spindle motor in DVD. In the new type of DVD, the rotor magnet, turntable and back yoke are integrated by one body injection mold. The magnet is magnetized in the process of injection. The injection mold is designed using finite element method. And the characteristics of the rotor magnet are analysed and compared with the experiment.
김창업 湖西大學校工業技術硏究所 1998 工業技術硏究所論文集 Vol.17 No.-
In this paper, a magnetic field analysis of a bonded magnet roller for laser printer is presented. The magnetization direction of bonded magnet is decided by the flux distribution of injection mold during the manufacturing process. The injection mold is designed and analysed to fit design specification. The experiment shows that the flux distributions of magnet roller agree with the given specifications.
출력 향상을 위한 고압 유도전동기의 다중목적 형상 최적 설계
김창업,김민석 대한전기학회 2022 전기학회논문지 Vol.71 No.9
In this paper, a multi-purpose geometrical optimal design of a 1000 kW high-voltage induction motor was proposed for improving the output of the motor and reducing the temperature using a high-grade iron core and magnetic wedge. The Global Response Surface Method (GRSM) was used to satisfy the multi-objective optimization in complex design problems related to power and temperature. GRSM performs parallel analysis for accurate and efficient optimization searches, including local and global search capabilities. In addition, Hyperstudy a commercial optimization program, and an electromagnetic FEM solver were used to analyze the motor. As a result of optimum motor design, the output increased by 8% and the temperature decreased by about 10 % compared to the base model. The reliability of the proposed method was verified through experiments.