• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 전문대학교육위원
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• pp.84-87
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• 2004

The Attractive features of the proposed converter has lower number of power devices and also has full regenerative capability, freewheeling in chopping or PWM mode, simple control strategy and faster demagnetization during commutation. The dump component energy requirements are much lower in this converter topology than another C-dump converters. As a result, The proposed converter has improved efficiency in the overall system than Modified C-dump converter, this thesis was approved its superiority by simulation and experimental results.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.29-32
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• 2002

The developed locomotive in coal mine drawn by the parallel drive system of the double Switched Reluctance motors is introduced. The operational principles, the control pattern and the component parts of the traction and the regenerative braking operation are proposed. The drive system contributes to reduce the cost of utilization of the locomotive per ton kilometer.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2014년도 전력전자학술대회 논문집
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• pp.245-246
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• 2014

본 논문에서는 외전형 영구자석 동기 전동기의 전기적 브레이크 동작 시에 발생하는 회생 에너지를 분석한다. 그리고 전류 정보 없이 전동기 속도 및 배터리의 전압만으로 회생 전력을 제어하는 방법을 제안한다. 후륜 허브 전동기를 가지는 자전거 프로토 타입을 제작하고, 제안하는 회생 제동 제어 기법을 적용한 실험을 통해 제안 기법을 검증한다.

• 신재생에너지
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• 제2권2호
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• pp.23-27
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• 2006

The power split hybrid powertrain is considered to be one of the most prospective configuration for the hybrid electric vehicle (HEV). Toyota Prius, representing this type of vehicle, showed outstanding performances in fuel efficiency, emission reduction and acceleration. The excellence is largely due to the fact that it utilizes almost all operation modes of HEV. Those modes include ZEV (Zero Emission Vehicle) driving, idle stop, fuel cut-off, power assist, active charging, regenerative braking and so forth. In this paper, a few of the mode operations were simulated using AVL Cruise. Also, control logics to operate the powertrain in each mode were developed. The states of powertrain components were displayed and analyzed. By controlling the three components (engine, motor and generator), it was possible to run the powertrain in several hybrid operation modes.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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• pp.639-643
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• 2003

We are interested in this paper on the control of an electromechanical system consisting of a doubly-fed induction generator(DFIG), driven by a prime mover that can supply or extract mechanical power, e.g., a flywheel inertia, and an induction motor(IM). The stator of the Induction machine is connected to the stator of the generator whose rotor voltage is regulated by a bidirectional converter. The main interest of this configuration is that it permits a bidirectional power flow between the motor, which may operate in regenerative mode, and the generator We propose a passivity-based controller to regulate the motor mechanical speed. Since this kind of controllers achieve stabilization via energy balancing, regulation of the power flow in the system is naturally incorporated. Simulation results are presented to illustrate the main points of our paper.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.463-465
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• 2005

This paper proposes a regeneration inverter system, which can regenerate the excessive power form the DC bus line to the AC source for traction systems. The proposed regeneration inverter system for DC traction can reduce harmonics which is a characteristic of the AC current source. The simulation was composed as a prototype model[3.7kW]. Finally, it is shown that the inverter can successfully operate in regeneration mode.

• 한국전자통신학회논문지
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• 제11권2호
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• pp.179-184
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• 2016

본 연구를 통해 개발된 전기부하시험장치는 상용전원이 필요한 피시험장치(변압기, 정류기, 전압조정기, 인버터 등)와 상용전원이 불필요한 독립형 피시험장치(동력발전기, 풍력발전장치, 태양광발전장치, 하이브리드발전 장치, 배터리 등)에 대하여 정격용량시험이나 가변부하시험을 능동적으로 정밀하게 제어하면서도 시험 중에 사용되는 전기에너지를 소비하지 않고 전원변환장치를 통하여 계통선으로 전달하도록 설계되었다. 동기식 pwm 인버터회로를 상용전원과 연결시켜서 시험에 사용되는 전력을 계통선으로 귀환되도록 설계되었으며, 종전의 수동식 전기저항체를 사용한 전기부하시험장치에 비해 93.4% 정도의 전력을 소모하지 않고도 피시험체에 대한 시험이 가능하도록 하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2005년도 전력전자학술대회 논문집
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• pp.125-127
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• 2005

In this paper, the control algorithm of DC source device for inverter starting is proposed and the control method for compensating unbalance system source on operating time in the voltage type PWM converter with driving and regenerative faculty is suggested. The maintaining way of balancing condition for converter of AC source is used the compensating unbalanced status by current control loop. Because it is possible that the unbalanced System control is used to leakage transformer not equaled reactance by each phase in rectifier system, the proposed H/W and control algorithm of rectifier system is contributed to minimize of device and rising efficiency.

• 전기학회논문지
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• 제66권2호
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• pp.459-467
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• 2017

An urban railway power substation consists of three thyristor dual converters. Two converters are connected to up and down trolley line to supply the electric energy or feed the regenerative energy back to the distribution. When the two converters break down, the remaining converter is used in an emergency. One thyristor dual converter system (TDCS) manages the energy of two or three railway stations. If the TDCS fails, the trains stop operating. To solve the problem, this paper proposes the three parallel operation control algorithm of thyristor dual converter system using the emergency converter. The broken TDCS can be replaced by the emergency converter in other TDCS. The effectiveness of this proposed control is verified by simulation.

• 전력전자학회논문지
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• 제10권4호
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• pp.373-379
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• 2005

본 논문에서는 인버터를 구동하는 용도의 직류전원장치에 대한 제어 알고리즘 개발을 목표로 하고 있으며, 구동과 회생기능을 갖는 전압형 PWM 컨버터에서 운전시 전원의 불평형을 보상하는 제어방법을 제안한다. 교류전원에 대하여 컨버터가 항상 평형상태를 유지하는 방법은 전류제어 루프에 의하여 불평형 상태를 보상하는 방법을 사용하였으며, 불평형의 제어는 전력변환기의 구성면에 있어서 각상의 리액턴스가 같지 않은 누설변압기 등의 사용을 가능하게 하므로 제안된 전력변환기의 하드웨어와 제어 알고리즘은 장치의 소형화와 효율향상에 기여할 것이다.