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Deok-Je Bang,Seon-Hwan Hwang 전력전자학회 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5
This paper proposes a wide air-gap control method for the multi-module permanent magnet linear synchronous motor (MM-PMLSM) based on independent vector control. In particular, the MM-PMLSM consists of symmetrical multi-module and multi-phase structures, which are basically three-phase configurations without a neutral point, unlike conventional three-phase machines. In addition, there are no additional magnetic levitation windings to control the normal force of the air-gap between each stator and mover. Hence, in this paper, a dq-axis current control applying a d-q transformation and an independent vector control are proposed for the air-gap control between the two symmetric stators and mover of the MM-PMLSM. The characteristics and control performance of the MM-PMLSM are analyzed under the concept of vector control. As a result, the proposed method is easily implemented without additional windings to control the air-gap and the mover position. The effectiveness of the proposed independent vector control algorithm is verified through experimental results.
Bang, Deok-Je,Hwang, Seon-Hwan The Korean Institute of Power Electronics 2016 JOURNAL OF POWER ELECTRONICS Vol.16 No.5
This paper proposes a wide air-gap control method for the multi-module permanent magnet linear synchronous motor (MM-PMLSM) based on independent vector control. In particular, the MM-PMLSM consists of symmetrical multi-module and multi-phase structures, which are basically three-phase configurations without a neutral point, unlike conventional three-phase machines. In addition, there are no additional magnetic levitation windings to control the normal force of the air-gap between each stator and mover. Hence, in this paper, a dq-axis current control applying a d-q transformation and an independent vector control are proposed for the air-gap control between the two symmetric stators and mover of the MM-PMLSM. The characteristics and control performance of the MM-PMLSM are analyzed under the concept of vector control. As a result, the proposed method is easily implemented without additional windings to control the air-gap and the mover position. The effectiveness of the proposed independent vector control algorithm is verified through experimental results.
1MW급 조류발전기 모듈화 및 유체베어링 설계적용 검토
방덕제(Deok-je Bang),김동준(Dong-Jun Kim),오진안(Jin-An Oh),한필완(Pil-Wan Han),전연도(Yeon-Do Chun) 한국해양환경·에너지학회 2021 한국해양환경공학회 학술대회논문집 Vol.2021 No.10
본 논문에서는 1MW급 직접구동방식 영구자석형 조류발전기의 가격, 유지보수, 가동률 및 신뢰성 측면에서 경쟁력을 높일 수 있는 복수모듈형 회전자 구조와 유체베어링 적용을 검토한다. 복수개의 모듈로 구성된 회전자 구조는 제작, 조립, 취급, 수송, 설치, 유지보수에 용이하며, 유체베어링은 운전시에 기계적 접촉이 제거되어 베어링의 수명과 신뢰성 향상이 가능하게 된다. In this paper, a rotor configured with a plural module combination structure and a hydraulic bearing are represented in order to enhance the competitiveness in terms of price, maintenance, availability and reliability of 1MW direct-drive permanent magnet tidal generator. The rotor structure constructed with plural modules is easy to manufacture, assemble, handle, transport, install, and maintain, and the hydraulic bearings can remove the mechanical contact in between the rotor and the stator of the generator, thereby improving the lifespan and reliability of the bearing.
Chang Je Park,Chang Joon Jeong,Deok Ki Min,Hee Young Kang,Woo Seok Choi,Joo Chan Lee,Gyeoung Sik Bang,Ki Seog Seo 한국원자력학회 2008 Nuclear Engineering and Technology Vol.40 No.4
To transport process wastes efficiently from the Advanced Spent Fuel Conditioning Pyro-process Facility (ACPF) at the Korea Atomic Energy Research Institute (KAERI), a new hot cell cask has been designed based on an existing hot cell padirac transport cask, with not only a neutron absorber for improved shielding capability, but also a docking facility for an easy docking system. In the new hot cell cask, two kinds of materials have been considered as shielding materials, polyethylene and resin. To verify the transport compatibility of the waste and spent fuel for the ACPF, neutron and photon shielding calculations were performed using the MCNPX code. The source term was evaluated by the ORIGEN-ARP code system based on spent PWR fuel. From the calculation, it was found that the maximum surface dose rates of the hot cell cask with the two candidates were estimated within the limit (2 mSv/hr).
Park, Chang-Je,Jeong, Chang-Joon,Min, Deok-Ki,Kang, Hee-Young,Choi, Woo-Seok,Lee, Joo-Chan,Bang, Gyeoung-Sik,Seo, Ki-Seog Korean Nuclear Society 2008 Nuclear Engineering and Technology Vol.40 No.4
To transport process wastes efficiently from the Advanced Spent Fuel Conditioning Pyro-process Facility (ACPF) at the Korea Atomic Energy Research Institute (KAERI), a new hot cell cask has been designed based on an existing hot cell padirac transport cask, with not only a neutron absorber for improved shielding capability, but also a docking facility for an easy docking system. In the new hot cell cask, two kinds of materials have been considered as shielding materials, polyethylene and resin. To verify the transport compatibility of the waste and spent fuel for the ACPF, neutron and photon shielding calculations were performed using the MCNPX code. The source term was evaluated by the ORIGEN-ARP code system based on spent PWR fuel. From the calculation, it was found that the maximum surface dose rates of the hot cell cask with the two candidates were estimated within the limit (2 mSv/hr).
Jong-Hyun Bang,Hyang-Ho Je,Jae-Ho Kim,Ki-Deok Sim,Jeonwook Cho,Jae-Young Yoon,Minwon Park,In-Keun Yu Institute of Electrical and Electronics Engineers 2007 IEEE transactions on applied superconductivity Vol.17 No.2
<P>Before applying the high temperature superconducting (HTS) power cable to real utility network, system analysis should be performed using simulation tools. For the practical use of HTS devices in electrical power system, prior simulation analysis is very important. PSCAD/EMTDC simulation is one of the most popular and useful analysis tools for electrical power system. Unfortunately the model component for HTS power cable is not provided in the PSCAD/EMTDC simulation tool. In this paper, EMTDC model component for HTS power cable has been developed considering critical current, critical temperature, magnetic field, and recovery time constant which depend on the sorts of HTS wire. The numerical model of HTS power cable in the PSCAD/EMTDC was designed by using the real experimental data obtained from a real HTS 1G wire test. The utility application analysis of HTS power cable was also performed using the model component developed. The component for HTS power cable could be variously used when the power system includes HTS power cable, especially it will be readily analyzed by the PSCAD/EMTDC in order to obtain the data for the level of fault current, power flow, and power losses, and so on.</P>