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방덕제,황선환 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.
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.
Thermal Analysis of High Speed Induction Motor by Using Lumped-Circuit Parameters
한필완,최재학,김동준,전연도,방덕제 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.5
This paper deals with the electromagnetic and thermal analysis of high speed induction motor. The induction motor is analyzed by time-varying magnetic finite element method and its thermal analysis is carried out by using analytical lumped-circuit method. Analysis results are compared with the experiment of 29kW high speed motor prototype at 12,000rpm.