http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Geochul Jeong (검색결과 32 건)
- 무료
- 기관 내 무료
- 유료
-
A Study on Analytical Methods of FEM-Based Edge Heating System
Jeong, Geochul,Yang, Youngmin,Bae, Jae-Nam,Lee, Ju IEEE 2017 IEEE transactions on magnetics Vol.53 No.11
<P>This paper focuses on analytical methods of a finite-element method (FEM)-based edge heating system. The edge heating system plays a role in maintaining the temperature in the hot rolling process of carbon steel. Carbon steel moves along the production line and maintains the temperature by the edge heating system in the process. Power-of-the-edge heating system is transmitted to carbon steel during the process. Eddy currents are generated in carbon steel by Faraday's law of electromagnetic induction, and eddy current loss serves as a heat source to increase the temperature. Thus, there is a need for accurate electromagnetic-field analysis and thermal analysis because the eddy current path generated in carbon steel greatly affects the heat distribution in carbon steel. This multiphysics analysis requires high reliability. Accordingly, this paper presents a coupling analysis method using an FEM-based coordinate mapping method as a more accurate analytical method. This paper also established an analytical approach to the edge heating system using the ductility analytical method of this coordinate mapping method.</P>
-
도시철도차량 견인용 IPMSM의 구조 특성에 따른 회전자 형상 설계에 관한 연구
정거철(Geochul Jeong),박찬배(Chanbae Park),오세영(Seyoung Oh),이주(Ju Lee) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10
본 논문에서는 도시철도차량 견인용 IPMSM(Interior Permanent Magnet Synchronous Motor)의 구조 특성에 따른 회전자 형상 설계에 관한 연구 논문이다. IPMSM의 회전자가 고속으로 회전하면서 회전자 내부에 삽입되어 있는 영구자석이 강한 원심력을 받는다. 이때에 구조적 강성이 약해지므로 회전자 형상에 따라 큰 영향을 미치게 된다. 따라서, 도시철도차량 견인용 IPMSM의 설계 및 요구사양에 적합하면서 강성에도 강한 모델을 1차 모델로부터 도출하였다. 영구자석을 분할해 Bridge를 1, 2개 적용하여 설계한 후 전기적 특성과 구조적 특성을 분석하였다. 따라서, 본 논문에서는 회전자 형상이 다른 3개의 모델을 분석함으로써 도시철도차량 견인용 IPMSM의 요구사양에 만족하며 구조 특성에도 강한 모델을 도출하였다. In this paper, a study on rotor shape design according to structure characteristics of IPMSM (Interior Permanent Magnet Synchronous Motor) for urban railway vehicle traction. Permanent magnet of inner rotor while rotating the rotor of IPMSM at high speed receives a strong centrifugal force. At this time, weakening the structural rigidity, the structure characteristics has a significant effect depending on of a rotor shape. Therefore, suitable for design and requirements of IPMSM for urban railway vehicle traction, and was derived model a stronger structural rigidity from the primary model. After the design is applied for 1, 2 Bridge divided permanent magnet, analyze the electrical and structural characteristics. Therefore, in this paper, analyzes the model in three different rotor shape, suitable for requirements of IPMSM for urban railway vehicle traction, and was derived model a stronger structural rigidity.
-
-
철도 분기기의 설빙 방지를 위한 유도방식 히팅 장치의 특성 분석 연구
정거철(Geochul Jeong),지우영(Woo-Young Ji),김진출(Jin-Chul Kim),박찬배(Chan-Bae Park),이재범(Jae-Bum Lee),이주(Ju Lee),이형우(Hyung-Woo Lee) 대한전기학회 2020 전기학회논문지 Vol.69 No.10
In this paper, a study was conducted on an induction type heating device to remove snow and ice that may cause obstacles and malfunctions of the railway switch. In the induction heating device, an ohmic loss is the heat source. Ohmic loss and heat transfer change greatly depending on the shape and material of the heating device and condition of the atmosphere. Since the loss must be accurately calculated to conduct the thermal analysis properly, it is necessary to analyze the electromagnetic and thermal characteristics and to interlock of electromagnetic and thermal analysis. Therefore, the electromagnetic and thermal analysis was conducted using finite element method (FEM). By the performance test of the prototype, verification of the simulation was conducted.
-
도시철도차량용 IPMSM의 Magnet Segment 변화에 따른 특성 분석에 관한 연구
정거철(Geochul Jeong),박찬배(Chan-Bae Park),정태철(Taechul Jeong),이주(Ju Lee) 대한전기학회 2015 전기학회논문지 Vol.64 No.10
The following study carried out the characteristic analysis based on the magnet segment of Interior Permanent Magnet Synchronous Motor(IPMSM) for the urban railway vehicles. IPMSM affects the electromagnetic characteristics through the change in magnetic flux based on the rotor structure, and significantly influences the structural features through the change of pressure. Therefore, satisfied by the demanded traction force of the IPMSM, magnet segment derived three different model types. The 1-segment PM model consisted an undivided permanent magnet. The 2-Bridge model consisted a divided permanent magnet with the application of Bridge. The 3-Bridge model consisted additional dividing with one more Bridge applied. The electromagnetic characteristics of the three models were compared and analyzed along with the structural features regarding the scattering of permanent magnet based on strong centrifugal force from the rotation of the rotor at high speed. In conclusion, the final model with electromagnetic characteristics and structural features most suitable of IPMSM for the urban railway vehicles was derived, and the effectiveness was verified through the characteristic experiments after the production of the derived model.
-
-
고속열차의 공기저항 저감을 위한 SD플라즈마 액추에이터의 특성 실험
정거철(Geochul Jeong),노슬기(Seulgi Roh),이병송(Byungsong Lee),이준호(Junho Lee),박찬배(Chanbae Park),이수길(Sugil Lee),이형우(Hyungwoo Lee) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5
본 논문에서는 고속열차의 공기저항 저감을 위해 열차에 부착할 SD(Sliding Discharge)플라즈마 액추에이터를 설계한 후 유속 측정 실험을 했다. 풍동 시험에 적용하기 위해 전두, 중간, 후미부에 알맞은 액추에이터의 크기를 선정 후 설계했다. 액추에이터 전체 폭(40mm), 상부 전극의 폭(5mm)은 임의로 정하고 유전체 두께도 전압 세기를 고려해 0.6mm로 정했다. AC/DC 전압, 주파수, 상부 전극의 간격을 변수로 설정하고 변수 조건마다 유속을 측정했다. 특정 상부 전극의 간격에서 유속의 최고치를 측정할 수 있었다. 이 때 조건을 토대로 SD플라즈마 액추에이터를 여러 개 연결해서 구동시키면 더 빠른 유속이 발생될 것으로 기대된다. In this paper, after design of SD(Sliding Discharge) plasma actuator that is attached to the train to reduce air resistance of high-speed trains the flow velocity measurement were experiment. After select the appropriate size of the actuator to frontal, middle, and aft in order to be applied to the wind tunnel test were designs. Actuator full width(40mm) and width of the upper electrode(5mm) set arbitrarily, and to the 0.6mm thickness of the dielectric by considering the intensity of the voltage was set. Variable to the AC/DC discharge voltage, frequency, and upper electrode interval is set each variable condition were measured flow velocity. Peak of flow velocity from the specific upper electrode interval could be measured. At this time, When drive by connecting multiple SD plasma actuator based on conditions of the fastest flow velocity is expected to be occurs faster flow velocity.
-
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
