• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.69-72
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• 2002

In this study, We proposed high efficiency wind power generator system for induction generator used SVPWM swiching inverter. First, We propose Equivalient Circuit for Induction Generator, it's characteristics equation, and power equation of slip. In addition, we suggest Pick Power Traction Slip control methods, adapted variable wind power system. We study simulation result for the proposed system and output power by slip effect. and we identify SVPWM of suitable wind power system by comparison between SPWM and SVPWM Consequently, we show that the system control result from variable wind power is suitable.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.556-557
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• 2010

본 논문은 하이브리드 자동차의 구동모터용 인버터에 적용되는 수랭 히트싱크의 설계 타당을 수치해석을 통해 검증하는 방법을 제시한다. 전력변환장치의 손실 계산, 발열체 모델링, 히트싱크 형상 모델링, 수랭 조건 입력, 히트싱크상의 열적 분포 해석, 유체 거동 시뮬레이션의 과정을 거치며, 본 논문에서는 650Vdc, 150kW급의 시리즈 하이브리드 차량의 구동 모터용 인버터를 예로 그 과정을 설명하고자한다.

• Proceedings of the KIEE Conference
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• 1999.11b
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• pp.420-422
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• 1999

To improve traction effort performance and stability of Korean High-Speed Railway Train, a practical re-adhesion controller including a novel wheel slip protection control scheme is proposed. The presented method is verified by various train running simulations by induction motor vector control with PWM inverter.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1112-1114
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• 2006

Tilting train has been developed to increase the operational speed of the trains on conventional lines which have many curves. This train are tilted at curves to compensate for unbalanced carbody centrifugal acceleration to a greater extent than compensation produced by the track cant, so that passengers do not feel centrifugal acceleration and thus trains can run at higher speed at curves. This paper show that results of normal capacity calculations of the electrical equipments such as Main transformer, PWM converter, VVVF inverter, traction motor in TTX(tilting train express) with maximum operation speed 180km/h

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1892-1896
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• 2008

Inverter-fed induction motors (IFM) are prevalent in traction vehicles. However, the winding insulation of IFM is substantially more stressed than of line-powered motors by surge voltages. Consequently, the winding insulation of IFM should be estimated by surge voltages. Also, the weakness of coil insulation can be detected by the surge voltage test. This paper described the insulation evaluation of induction motors by application of surge voltages. A surge voltage generator with the maximum voltage of 5 kV and the selectable rise-time in ranges of $50\;ns\;{\sim}\;500\;ns$ was fabricated. In the experiment, we applied surge voltages into induction motors with the magnitude and the risetime according to IEEE 522. By the analysis of applied surge voltage and current waveforms, we could find difference between normal and defection windings.

• Proceedings of the KIPE Conference
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• 2018.07a
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• pp.292-293
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• 2018

이 논문은 자동차 어플리케이션 용 고출력 인버터 시스템의 개발에 대한 연구내용을 제시한다. 차량을 포함한 고출력 시스템의 젼력변환시스템의 큰 이슈중 하나가 고효율 및 고밀도화에 대한 연구이다. 특히 자동차의 경우 내부 공간이 제한적이고 전장품들의 수량이 늘어나는 추세이므로 전력변환시스템의 부피 및 고출력화에 대한 이슈와 이와 연관된 냉각 문제에 대한 연구가 활발히 이루어지고 있다. 본 논문에서는 차량용 고출력밀도의 트랙션 인버터 개발에 대해 언급하고 있으며 실험을 통해서 그 결과를 확인하였다.

• Proceedings of the KIEE Conference
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• 1999.07a
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• pp.461-464
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• 1999

To improve traction effort performance and stability for the Korean High-Speed Railway Train, practical re-adhesion controller including a novel anti-slip control scheme is proposed. The presented method is verified by train running simulation results based on induction motor vector control with PWM inverter.

• International Journal of Railway
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• v.1 no.3
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• pp.89-93
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• 2008

Reliability of onboard power supply systems on rolling stock is a very important issue for the railway operator. While a failure of the HVAC supply results in a loss of comfort for the passengers, a failure of the supply for air compressors or for the traction cooling systems results in towing the train. This is, looking at the required availability of a train, not acceptable. An active redundancy concept for the onboard power supply maximizes the availability of the system. This paper describes such a system under the aspect of $\cdot$ Weight reduction $\cdot$ Continuous operation when changing from normal to redundant operation $\cdot$ Flexibility in train design.

• Proceedings of the KSR Conference
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• 2006.11b
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• pp.185-191
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• 2006

Auxiliary power supply developed by domestic technology has very important function that not only effect on main power converter & inverter system, traction motor and train control system which are related to performance of train, but also influence on power supply for HVAC(Heat, Ventilation, Air-conditioning) and lighting device which are related to comfort of passengers. This paper shows characteristic test results of auxiliary power supply such as working condition and performance, which is associated with velocity of train, operating mode and surrounding equipment, through test running. Also it shows the results deduced from comparison analysis between designed data and manufactory test data as measuring in put voltage of auxiliary power supply. And, it propose a modification of design parameter for stabilizing operation and improving reliability.

• Journal of the Korean Society for Railway
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• v.10 no.1 s.38
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• pp.84-87
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• 2007

Auxiliary power supply developed by domestic technology has very important function that not only effect on main power converter & inverter system, traction motor and train control system which are related to performance of train, but also influence on power supply for HVAC(Heat, Ventilation, Air-conditioning) and lighting device which are related to comfort of passengers. This paper shows characteristic test results of auxiliary power supply such as working condition and performance, which is associated with velocity of train, operating mode and surrounding equipment, through test running. And, it propose a modification of design parameter for stabilizing operation and improving reliability.