http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
SMC을 적용한 BLDC motor 컴프레서 특성실험에 대한연구
한만승(M. S. Han),양형열(H. Y. Yang),임영철(Y. C. Lim) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
본 논문은 연자성체(Iron powerder)인 일명 SMC(Soft Magnetic Composite)를 적용한 3상 BLDC motor의 설계 및 제작 , 측정에 관한 연구이다. 특히 본 연구에서는 냉장고 압축기용 120W급 3상 BLDC motor에 관한 것으로써 연자성체를 적용시 모터 특성결과에 대하여 기술하였다. 아울러 SMC를 이용한 모터설계의 기준을 제시하였다. SMC 재질은 일반 실리콘 강판에 비해 코어의 3차원 형상을 자유롭게 제작 할 수 있으며, 고속 회전시 발생하는 철손을 감소시킬 수 있어 모터 코어용으로 많은 연구가 이뤄지고 있다. 따라서 본 논문에서는 우선 2차원 설계를 통하여 냉장고 압축기용 BLDC motor의 코어를 SMC 재질로 제작 성능 측정 하였다.
RP titanium cap과 rhBMP-2를 이용하여 형성된 신생골의 미세전산화단층촬영을 이용한 평가
한만승(Man-Seung Han),정승곤(Seunggon Jung),김방신(Bang-Sin Kim),양지웅(Ji-Woong Yang),국민석(Min-Suk Kook),박홍주(Hong-Ju Park),유선열(Sun-Youl Ryu),오희균(Hee-Kyun Oh) 대한구강악안면외과학회 2010 대한구강악안면외과학회지 Vol.36 No.6
Introduction: This study examined the effect of recombinant human bone morphogenetic protein (rhBMP)-2 and β-tricalcium phosphate (β-TCP) on new bone formation in a rabbit calvarium using a rapid prototype titanium cap (RP Ti cap). Materials and Methods: Eight New Zealand white rabbits were used in this study. Hemispherical RP Ti caps (10 mm in diameter) were implanted subperiosteally on the rabbit calvaria. β-TCP was filled in the RP Ti cap in the control group, and rhBMP-2 soaked β-TCP was used in experimental group. The rabbits were sacrificed 2 and 4 weeks after the operation. The volume and pattern of newly formed bone was analyzed by micro computed tomography (CT). Results: Macroscopically, there were no abnormal findings in any of the animals. The micro CT images revealed new bone from the calvaria that expanded gradually toward the top of the titanium cap, particularly along the inner surface of the titanium cap in the experimental group at 4 weeks after grafting. There was no significant difference in new bone volume ratio between the control and experimental groups at 2 weeks after grafting. There was a statistically significant difference in the new bone volume ratio between the experimental (14.1±1.8 %) and control (7.2±1.5 %) groups at 4 weeks after grafting (P<0.01). Conclusion: The RP Ti cap can effectively guide new bone formation and rhBMP-2 can induce the new bone formation
전기자동차용 0.5[kW]급 공기압축기의 브러시리스 직류전동기 개발
한만승(Man-Seung Han),홍성렬(Song-Ryul Hong),조주희(Ju-Hee Jo),이상훈(Sang-Hun Lee),박성준(Seong-Jun Park),김대경(Dae-Kyong Kim) 한국조명·전기설비학회 2012 조명·전기설비학회논문지 Vol.26 No.8
Recently, it is increased to apply sensorless drive for BLDC (Brushless DC) motor to maximize operating efficiency and fuel efficiency to an electrical component of (H)EV. Especially, Electric vehicle component promotes a fuel efficiency enhancement by the carbon dioxide emissions regulation of a vehicle becoming the principal of the environmental pollution globally, the oil price hike that continued increasingly. We suggested the air compressor which applied BLDC motor for electric vehicle component and compared suggested BLDC motor with the conventional DC motor. The experimental results show that the driving efficiency was increased and was inproved compressive force by suggested BLDC motor.
전압 변동분 보상회로를 이용한 새로운 LED 구동드라이브 설계
한만승(Man-Seung Han),이용재(Yong-Jae Lee),박성준(Sung-Jun Park),이상훈(Sang-Hun Lee) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.5
Currently high power Light Emitting Diode (LED) is in the limelight due to its characteristics of long durability, low maintenance costs, and high efficiency. Furthermore, it does not emit pollutants or poisonous gases and is a light source not using mercury, so it holds a high status in eco-friendly terms as well. In this paper, we studied a two-stage LED power drive circuit that can compensate only voltage regulation through LED output current, in order to improve efficiency of LED drive with constant current control in accordance with changes in temperature. The proposed LED drive has an advantage of reducing LED drive's voltage losses by controlling only voltage change of input power, compared with an existing circuit which controls input voltage. The suggested non-insulation compensating circuit for voltage change was verified to have improved efficiency relative to a LED drive using existing DC/DC converter.
에너지 회수 회로를 이용한 새로운 LED 구동드라이브 설계
한만승(Man-Seung Han),임상길(Sang-Kil Lim),박성준(Sung-Jun Park),이상훈(Sang-Hun Lee) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.6
The high-power LED (Light Emitting Diode) which is recently gaining popularity as a digital light source has such advantages as low power consumption, long life, fast switching speed, and high efficiency. Thus, many efforts are being made to use the high-power LEDs for general lighting. This paper proposes LED driving circuit uses a DC/DC converter that can recover energy to compensate for the current variations caused by changes in LED equivalent resistance following a temperature change instead of serial resistance. The maximum input voltage of this DC/DC converter has low voltage variations by temperature change when the rated current is formed. In order to return current to the input side, we need a high boosting at low power. Thus, to improve the low efficiency of power converter, the power converter can be configured in such a way to gather the powers of low-capacity DC/DC converters and return the total power. Experiments showed that the proposed system improved efficiency compared to the conventional LED drive using the existing DC/DC converter.
전산화단층촬영상에서 하악후퇴수술 후 인두기도 공간의 변화
김방신,정승곤,한만승,정연욱,국민석,박홍주,오희균,유선열,Kim, Bang-Sin,Jung, Seung-Gon,Han, Man-Seung,Jeoung, Youn-Wook,Kook, Min-Suk,Park, Hong-Ju,Oh, Hee-Kyun,Ryu, Sun-Youl 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
Purpose: This study evaluated the pharyngeal airway space changes in CT images in patients receiving bilateral sagittal split osteotomy (BSSRO) for the surgical correction of mandibular prognathism. Methods: A total of 22 patients with mandibular prognathism were treated using BSSRO. Computed tomography was performed 1 month (T0) before surgery and, 1 month after surgery (T1). The anteroposterior length (AP), lateral width (LAT) and cross-sectional area (AREA) at the level of soft palate (C2) and base of the tongue (C3) were measured using CT images. Results: The mean amount of mandibular setback was 7.41 mm (${\pm}$3.46 mm). All the AP, LAT and AREA at the C2 and C3 level were decreased significantly 1 month after surgery (P<0.001). As the amount of mandibular setback was increased, the AP, LAT and AREA levels at the level of C2 and C3 had decreased. In addition, the reduction of the AREA at the C3 level was associated with the amount of mandibular setback (P<0.05). Conclusion: A significant decrease in pharyngeal airway space was observed 1 month after the operation. The cross-sectional area at the level of base of tongue was decreased with increasing amount of mandibular setback.