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조성준(Sung-Joon Cho),김태완(Tae-Wan Kim),우명호(Myung-Ho Woo),서광덕(Kwang-Duk Seo) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
Power electronic converters generate the harmonic voltage and current, and these harmonics have the harmful effects on the various components. For example, passive components such as capacitor and inductor, transformer, motor and other components are mainly affected in the power electronic system. Thus, the design and manufacturing of the power converters, which have the harmonic-free or mitigation strategies, are required. In particular, the lifetime and durability of these componets are main requirement for enhancing the overall stability of the system. So, in this paper, the harmonics-related problems to the neighbouring components and mitigation research trends are presented.
조성준(Sung-Joon Cho),정만규(Man-Kyu Jeong),이광주(Kwang-Ju Lee),박건태(Geon-Tae Park),김두식(Du-Sik Kim) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
본 논문에서는 고속전철용 추진제어장치의 개발 및 본선 주행시험에 관한 내용을 소개하였다. 고속열차용 추진제어장치는 입력 전류의 고조파를 감소하기 위하여 단상 PWM 컨버터 2대가 병렬로 구성되고 인버터는 3상 인버터 1대로 구성된다. 추진제어장치의 전력회로를 간단히 구성하기 위하여 최대용량 (4500V/4200A)의 IGBT 전력소자를 적용하였다. 3상 인버터는 가속시 스위칭 기어현상을 저감하기 위하여 저주파 동기 PWM 기법을 적용하였다. 추진제어장치의 성능을 평가하기 위하여 실제 차량이 운행될 본선에서 속도 300㎞/h까지 가속시험, 비상제동 시험, 구배기동 시험 등을 실시하였다. 시험을 통하여 제작된 추진제어장치가 성능사양을 만족함을 확인하였다.
한국형 고속열차 주전력변환장치의 상용화 기술 확보에 관한 연구
조성준(Sung-Joon Cho),이광주(Kwang-Joo Lee),김태완(Tae-Wan Kim),우명호(Myung-Ho Woo),고영철(Young-Cheol Ko),김두식(Du-Sik Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
KHSR(Korean High Speed Railway) had achieved the maximum speed of 350 km/h last year. And then, we have concentrated to improve the reliability of the overall system, in particular, motor block of the locomotive. In this paper, simple technique for operating PWM converters under the voltage distortion is introduced. In addition, the electrical braking technique is also made to have the braking capability under the dead zone. Test results revealed the verification of the proposed techniques.
고속전철용 추진제어장치의 냉각용 인버터를 위한 제동초퍼 회로 설계 및 제어
조성준(Sung-Joon Cho) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
This paper introduces the design and control method of braking chopper circuit which can supply input power to ventilation inverter of traction control system. The DC input voltage from auxiliary block (static inverter) is normally used as an input of ventilation inverter. It converts DC input to AC output voltage to drive cooling fans for traction control system and traction motors. The electrical braking force is very important for high speed train to guarantee safety even though the train is running in the dead section where the pantograph voltage is not supplied. When the high speed train decelerate speed in dead section, the regenerative energy is dissipated by braking resistor. This paper proposed the braking chopper control method to implement rheostatic braking function and the appropriate chopper circuit for supplying voltage source to ventilation inverter during rheostatic braking mode. The proposed chopper circuit makes it possible for traction control system to regenerate power continuously regardless of the existence of pantograph voltage. The feasibility of proposed braking chopper control and circuit were proven by inertia load test and actual train field test.
도로 노면 정보를 이용한 그래프 기반 자율주행용 정밀지도 생성
조성준(Sung-Joon Cho),임준혁(Jun-Hyuck Im),지규인(Gyu-In Jee) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.12
As location recognition for autonomous vehicles develops, the need for a precise map for autonomous driving has increased. A precise map must be built based upon accurate position. Recent studies have accelerated research in this area by using various sensors that calculate the accurate position by comparing and recognizing objects around the roads. However, application of such methods is limited because these studies only take objects with significant verticality into consideration. Thus, new research is needed to overcome the limitations: a method that is not constrained by the existence of certain types of surrounding objects shall be proposed. Most roads contain road marking information, such as lanes, direction signs, and pedestrian crossings. Such information on the road surface is a valuable resource for building a precise map. This paper proposes a method of building a precise map by using road marking information.