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철도 차량용 EMB의 클램핑 포스 과도응답 향상을 위한 토크 예측 제어
장윤,박영수,이교범,Jang, Yoon,Bak, Yeongsu,Lee, Kyo-Beum 한국전기전자학회 2017 전기전자학회논문지 Vol.21 No.3
본 논문은 철도 차량용 electro-mechanical brake (EMB)의 클램핑 포스 과도응답 향상을 위한 토크 예측 제어 방법을 제안한다. 일반적으로 철도 차량에는 공압식 제동 시스템이 사용된다. 공압식 제동 시스템은 외부환경 변화에 민감하며, 과도응답 속도가 느리기 때문에 공주시간이 증가한다. 또한, 긴급 제동과 같은 기준 이상의 제동 토크를 인가하는 경우에 제동 효율이 낮은 단점이 있다. 이러한 공압식 제동 시스템의 단점은 철도 차량용 EMB 시스템을 적용하여 극복할 수 있다. 철도 차량용 EMB 시스템은 차량의 축중을 감소시키고, 설계 공간을 확보하기 때문에 연비 증가 및 설계 유연성 확보 등의 장점을 갖는다. 본 논문에서는 철도 차량용 EMB의 클램핑 포스 과도응답 향상을 위한 제어 방법을 제안한다. 제안하는 제어 방법의 타당성은 시뮬레이션을 통해 검증한다. This paper proposes a torque predictive control for dynamic performance improvement of clamping force in electro-mechanical brake (EMB) for railroad cars. In general, pneumatic braking system (PBS) is used for railroad cars. It is sensitive depending on environmental changes and it has increasing idle running time because of slow dynamic response. Additionally, the PBS has low braking efficiency in case braking torque more than standard value is applied to the brake system such as emergency braking. In order to overcome these disadvantages of the PBS, the EMB is used for the railroad cars. The EMB for railroad cars has advantages that increasing the fuel efficiency and design flexibility because it is able to decrease vehicle weight of railroad cars and secure space for design. In this paper, control method for dynamic performance improvement of clamping force in EMB for railroad car is proposed. The effectiveness of the proposed control method is verified by the simulation results.
Back-to-Back 컨버터를 이용한 수차 발전 시스템의 직류단 전압 변동 저감
전성수(Sung-Soo Jeon),박영수(Yeongsu Bak),이교범(Kyo-Beum Lee) 대한전기학회 2019 전기학회논문지 Vol.68 No.9
This paper proposes minimization method of DC-link voltage variation in a hydraulic turbine generation system using back-to-back (BTB) converters. When the generation power is drastically changed, it causes the variation of the DC-link voltage. It deteriorates stability and efficiency of the hydraulic turbine generation system. This paper describes how the compensation current is calculated to reduce the variation of the DC-link voltage. The stability and efficiency of the hydraulic turbine generation system can be improved through the proposed compensation current. The proposed method was verified through the simulation and experimental results.
계통연계형 3-레벨 NPC 인버터의 6차 고조파 제어 기법을 이용한 계통 전류 고조파 저감
신지욱(Jiook Sin),박영수(Yeongsu Bak),박성수(Seong-Soo Park),이교범(Kyo-Beum Lee) 대한전기학회 2017 전기학회논문지 Vol.66 No.5
This paper presents a control method for reducing the distortion of the grid current at a grid-connected three-level neutral point clamped (NPC) inverter. The grid current is distorted from the 5th and 7th harmonic components in the stationary frame current also the 6th harmonic component in the synchronous frame current. In this paper, the 6th harmonic component on synchronous frame is controlled by using all-pass filters (APFs) and proportional integral (PI) controllers for distortion of the grid side. When transformed the 6th harmonic component is controlled, the 5th and 7th harmonic components are reduced. The validity of the proposed control method is verified by simulation and experiment results using a 25kW three-level NPC inverter.