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고효율 와이어리스 모터개발을 위한 코어 부품 해석 및 특성평가
성백섭 ( Back Sub Sung ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.3
The necessity of electric vehicle (EV) has recently expanded and increased attention while environmental restrictions has been stricter due to energy and environmental issues such as reinforced standards of discharged gas, depletion of fossil fuel, and global warming. EV is an area which expected to occupy 10% of the entire automobile markets in 10 years. If EV is mass-produced 10 years later, companies which advance first into the markets will have advantages and dominated the market in advance. The motor manufacturers for EV, home electronic and industry are rushing into development of 10 kW ~ 100 kW BLDC motor and EV driving motor. This study manufactured BLDC motor core as an EV driving motor system a three-dimensional design program as CATIA V5 R18 is used to model and improve BLDC core. Then transient heat transfer analysis with Ansys Workbench R13, health evaluation of spare parts according to thermal behaviors and achievement an optimal design of the EV motor are shown. A core was molded and sampled through powder compression molding to measure density and hardness. Therefore, the results are presented as follows: A less-weight optimal modelling was performed with a use of CATIAin decreasing from 1.15 kg to 0.99 kg of the core weight. A transient heat transfer with a use of Ansys Workbench R13 and the changes in temperature distribution of the near the BLDC rotor was larger than that of the around the BLDC core. In addition, based on these analysis results the transient heat transfer of many 3D models was performed. The BLDC core drawing works of less-weight optimal modelling were completed through a evaluated health of spare parts according to thermal behaviors. Five species of mold A-type and B-type were randomly extracted for density test, and the two samples were almost the same in molding density, 7.2g/cma . The densities of rare-earth permanent magnet were near to 7.2g/cma ~ 7.5g/cma, which indicates that powder compacting ability is good.
LBP Polygon Mirror 나노가공 부품의 가공조건에 따른 표면정밀도 향상에 관한 연구
성백섭(Back-Sub Sung),차용훈(Yong-Hoon Cha),김일수(Ill-Soo Kim),김선진(Sun-Jin Kim) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
Recent advances in high-tech industry and ultra precision machining technology have led to the development of a wide variety of new materials. The demand for LBP Polygon Mirror finishing parts has increased, which are mainly used for the motor of the printer. so ultra precision machining technology is required. It is important for Polygon Mirror to have the enough strength for the high-speed rotation and high quality Polygon line surface. Polygon Mirror, high-tech nano finishing part, is used for optical instrument such as laser printers, digital copiers, laser fax machines and bar -code readers, etc. Therefore, we have evaluated the machining precision of material surface and tried to determine the optimum machining conditions in order to improve machining precision of S3M. Also we have applied to the production line to reduce the defective proportion. As a result, we have obtained high quality precision of side surface machining in case that the number of revolutions, speed and movement were constant and cutting rate was 0.05㎜. Also we have obtained the same results from the 30 test specimens with constant rough-cutting during the Polygon line machining. The defective proportion decreased from 12 percent to 4~6 percent when the machining conditions selected during the test were applied to the real production line. It is expected that the defective proportion of products can be reduced if we conduct further research on the cleaning and heat treatment process.
정밀주조 다이캐스팅을 이용한 자동차 레귤레이터 하우징 성형해석에 관한 연구
성백섭(Back-Sub Sung),김미애(Mi-Ae Kim),차용훈(Yong-Hoon Cha),김정대(Jung-Dae Kim),김덕중(Duck-Joong Kim),이연신(Youn-Sin Lee) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. In this thesis, the computer simulation analyzed the flow of molten metal. The quantitative analyses which proposed the effective mold design was executed Flow patterns of 0.1-0.16㎧ molten metal in 15㎜ thin plate casting were investigated in order to optimize die-casting process. As increasing ingate velocity in thin plate casting, cold shot was decreased. The parameters of runner shape that affected on the optimized conditions that was calculated with simple equation were investigated. These die casting process control techniques of automobile regulator housing parts have achieved good agreement with the experimental data of tensile strength, hardness test, and material structure photographies satisfactory results.
성백섭 ( Back Sub Sung ) 조선대학교 공학기술연구원 2012 공학기술논문지 Vol.5 No.3
The study aimed to develop an ultra-pressure water-jet pump main body using ductile cast iron FCD500, conducted quantitative analysis on the phenomenon of flow or solidification processing for improvement of cast devise. After the selection of ideal condition of cast, it applied to cast of real product shape which is discovered the ideal filling processing under this condition that temperature of molten metal was between 1280℃ and 1300℃. Apart from finishing filling, solidification was commenced rapidly when percentage of solidification completion was between 40-50%, at that moment; the temperature was measured at 1100℃. Moreover, under the condition of temperature below than 900℃, keeping temperature on the center of parts for a certain period of time brings stability of stabilization of heat in parts and organizational stabilization of ductile cast iron.
성백섭 ( Back-sub Sung ) 조선대학교 공학기술연구원 2016 공학기술논문지 Vol.9 No.4
This paper describes independent multi-phase motor with a maximum torque among DC motor used for Divide Type Powder Molding Core BLDC. Independent multi-phase BLDC motor has characteristic that density of core are independent electrically. This paper is modeling of magnetic flux density BLDC motors, one has low magnetic flux density type and the other has high magnetic flux Density type, and it shows simulation of them, compares its characteristics. This paper focuses on starting performance improvement and magnetic flux density improvement of brushless DC motor for EV. As a result of simulation, the efficiency of BLDC motor of high magnetic flux density 7.41~7.48 g/cm2 is higher than BLDC motor of low magnetic flux density 7.11~7.28 g/cm2. It is also found that the motor efficiency of independent multi-phase BLDC motor was decreased by the magnetic flux density of independent BLDC motor. In order to increase efficiency from the motor and keep the motor operating at its most quality warranty, the high magnetic flux density of divide type power molding core using on motor for an EV is proposed and analyzed specifically.
박창선(Chang Sun Park),성백섭(Back Sub Sung),차용훈(Yong Hun Cha),박용순(Yong Sun Park) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
다이캐스팅 공정은 정밀한 금형에 용탕을 압입시켜 고정도의 주조표면을 갖는 주물을 대량 생산하는 기공방식이다. 성형체의 정밀성과 주조 후처리 과정의 간소화, 자동화의 용이성 등의 장점으로 인해 산업 전반에 걸쳐 널리 사용되고 있다. 본 논문은 LPI 자동차 레귤레이터 제품은 고압의 내압을 받으며, 품질 성능에 따라 자동차의 가장 기본적인 연료공급 시스템의 핵심 역할을 한다. 고품질화된 성형제품 생산을 위하여 결함의 발생원인에 대한 이해를 통해 제조공정에서 발생하는 결함을 예측하고, 특히 오버플로우의 개소에 따라 제품의 성형에 관한 신뢰성을 증명하고자 하였다. This study examined the casting analysis of fuel pressure regulator of LPI vehicles. We aims to predict all the phenomenon accompanied by flow and solidification in die casting, and maximize productivity and quality through optimal casting design. As a result of comparing Types A and B of casting design, it was found that the number of overflow affected flow, flow speed and solidification temperature. And there was a minute difference between solidification temperatures at thick section of the spare parts. Solidification began at temperatures of 624℃ ~ 630℃, but after the casting was completed, temperatures at the center of the parts were 600℃ ~ 614℃. Temperature of molten metal showed optimal flow at temperature of 680℃. It began to solidify around at 650℃, and to be cooled between 580℃ ~ 550℃ in high speed. When the process was analysed through a computer simulation, it was found that hardness of regulators manufactured through Type B of overflow was above H<SUB>R</SUB>60.