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관성변화시의 Anti-slip 제어기에 의한 유도전동기 병렬운전
전기영(Kee-Young Jeon),김중교(Jung-gyo Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In electric motor coaches, the rolling stocks move by the adhesive effort between rail and driving wheel. Generally, the adhesive effort is defined by the function of both the weight of electric motor coach and the adhesive effort between rails and driving wheel. The characteristics of adhesive effort is strongly affected by the conditions between rails and driving wheel. When the adhesive effort decreases suddenly, inertia conversion the electric motor coach has slip phenomena. This paper proposes a anti-slip control algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force using load torque disturbance observer. Based on this estimated adhesive effort, the anti-slip control is performed to obtain the maximum transfer of the tractive effort.
정춘병,전기영,이훈구,한경희,Chun, Choon-Byeon,Jeon, Kee-Young,Lee, Hoon-Goo,Han, Kyung-Hee 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.6
The author present a modified multi-loop algorithm including feedforward for controlling a 55kW step down chopper in the power supply of Maglev. The control law for the duty cycle consists of three terms. The first is the feedforward term. which compensates for variations in the input voltaga. The second term consists of the difference between the slowly moving inductor current and output current. The third term consists of proportional and integral terms involving the perturbation in the output voltage. This perturvation is derived by subtracting the desired output voltage from the actual output voltage. The proportional and integral action stabilizes the system and minimizes output voltage error. In order to verify the validity of the proposed multi-loop controller, simulation study was tried using Matlab simulink 본 논문은 자기부상열차용 전원의 문제점을 개선시키기 위해서 다중루프 제어기를 제시하였다. 제시된 제어기는 3개의 부분으로 구성되어 있다. 첫 번째는 입력전압의 변동에 대하여 보상할 수 있는 Feed Forward제어기이며 두 번째는 리액터 전류와 출력 전류의 차를 보상하며, 세 번째는 비례적분제어기를 사용하여 출력전압에 포함된 리플을 감소시키므로써, 안정화된 시스템을 구현하였다. 이 시스템의 특성을 확인하기 위해서 Matlab Simulink와 고성능 DSP소자인 TMS320F240을 이용하여 비교 분석하였다.
태양광발전을 이용한 냉동.냉장창고용 냉수펌프의 에너지절감 기법
김대균,전기영,이상집,정춘병,이훈구,한경희,Kim, Dae-Gyun,Jeon, Kee-Young,Lee, Sang-Chip,Chung, Choon-Byeong,Lee, Hoon-Goo,Han, Kyung-Hee 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.6
냉동 냉장창고용 냉수펌프 시스템을 태양광발전 시스템과 연계하여 펌프의 양정 및 유량의 변화에 따른 압력의 변화에도 불구하고 목표치 압력을 일정하게 제어할 수 있도록 하였다. BLDC 모터를 벡터제어 함으로써 각 운전속도의 영역에서 최대토크 운전 및 높은 신뢰성을 가능하도록 하여 냉동 냉장창고용 냉수 펌프 시스템의 에너지 절감 효과를 실현하였다. We are interaction refrigeration warehouse cold water pump system and photovoltaic generation system. At this time, a target pressure is able to control in spite of change of the pressure according to pump head and rate of flow of pump. Also, we carry out the vector control of BLDC motor with the maximum torque operation and a high reliability from territory of each operation speed. Therefore, in this paper, we conclude energy saving technique of refrigeration warehouse cold water pump system.
전지용(Ji-Young Chun),전기영(Kee-Young Jeon),정춘병(Chun-Byung Chung),한경희(Kyung-Hee Han) 한국조명·전기설비학회 2008 조명·전기설비학회논문지 Vol.22 No.12
본 논문애서는 부하전류의 급격한 변화에도 안정적인 출력진압을 얻기위하여 강압쵸퍼의 전압제어기를 개선하는 방법으로 부하전류 전향보상기를 제시하였다. 제시된 부하전류 전향보상기의 특성을 확인하기 위해 메이슨(Mason)의 이득공식을 이용하여 기존의 전압제어기가 포함된 전체 시스템의 전달함수와 부하전류 전향보상기가 추가된 전체 시스템의 전달함수를 각각 근궤적선도와 보드선도 상에서 비교하였다. 그 결과 시스템의 극점이 개선되고, 공진주파수에서의 첨두값의 크기 및 절점주파수의 위상여유가 양호한 것을 확인하였다. 따라서, 제시된 제어기법이 강압쵸퍼의 정상상태 및 동특성을 향상시키고 출력에 나타니는 외란에 의한 영향을 감소시킨 것을 확인할 수 있었다. In this paper, The author present a load current feed-forward compensator by method that improve voltage controller of Step-down Chopper to get stable output voltage to sudden change of load current. To confirm the characteristicsof a presented load current feed-forward compensator compared each transfer function of whole system that load cunent feed-forward compensator is added with transfer function of whole system that existent voltage controller is included using Mason gains formula in Root locus and Bode diagram. As a result the pole of system is improved, extreme point of the wave and system improves, and size of peak value and phase margin of break frequency in resonance frequency confirmed that is good. Therefore, presented control technique could confirm that reduce influence by perturbation and improves stationary state and dynamic characteristics in output of Step-down Chopper.
정춘병(Chung-Byeona Chung),전기영(Kee-Young Jeon),이상집(Sang-Chip Lee),김대균(Dae-Gyun Kim),이훈구(Hoon-Goo Lee),한경희(Kyung-Hee Han) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.11월
We are interaction refrigeration warehouse cold water pump system and photovoltaic generation system. At this time, a target pressure is able to control in spite of change of the pressure according to pump head and rate of flow of pump. Also, we carry out the vector control of BLDC motor with the maximum torque operation and a high reliability from territory of each operation speed. Therefore, in this paper, we conclude energy saving technique of refrigeration warehouse cold water pump system.
김대균(Dae-Gyun Kim),전기영(Kee-Young Jeon),함년근(Nyun-Gun Hahm),이상집(Sang-Chip Lee),오봉환(Bong-Hwan Oh),정춘병(Choon-Byeong Chung),김용주(Yong-Joo Kim),한경희(Kyung-Hee Han) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
The paper proposes the solar photovoltaic power generation system method for photovoltaic system to solve the power shortage due the sudden power demand. So that supplied electric power to system at appearance during surplus electric power minute and unit moment link driving with common use system is available, digital PLL circuit system voltage through composition and phase of solar photovoltatic power generation system to do synchronization do. Feed forward controller was applied to get fast current response. Solar cell that is changed by solar radiation always kept the maximum output when it used Step up chopper. The dynamic character had checked through simulation used Matlab Sumulink and confirmed through an experiment.
전력사용설비의 에너지 절감방안 및 관리를 위한 진단기법
정춘병(Choon-Byeong Chung),전기영(Kee-Young Jeon),함년근(Nyun-Gun Hahm),김대균(Dae-Gyun Kim),이상집(Sang-Chip Lee),오봉환(Bong-Hwan Oh),이훈구(Hoon-Gu Lee),한경희(Kyung-Hee Han) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
The human beings have increased concern about Energy saving and alternative energy. The power demand has increased the growth of industry and the improvement of life. We have to explore alternate energy sources and utilize effectively domestic resources. The lighting equipments developed Energy saving by using an electric ballast. The load installation should be promoted to rational power management, according to the network, inteligent, and high-function. Therefore, this paper has studied the method of energy saving and consulting.
최소차원 토크ㆍ관성 관측기를 이용한 전동기 극저속 운전
김은기(Eun-Gi Kim),전기영(Kee-Young Jeon),오봉환(Bong-Hwan Oh),정춘병(Choon-Byeong Chung),이훈구(Hoon-Goo Lee),김용주(Yong-Joo Kim),서영수(Young-Soo Seo),한경희(Kyung-Hee Han) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, an instantaneous speed observer with a reduced order is proposed to implement an indirect control for an motor with excellent dynamic stability and performance in a very low speed region. The proposed observer can estimate the instantaneous speed in very low speed region and simplify the system configuration by adopting a least order load torque-inertia observer to estimate the load torque and the rotor speed. Simulation are carried out to illustrate the performance of the proposed estimator at very low speed.
정춘병(Choon-Byeong Chung),전기영(Kee-Young Jeon),이상현(Sang-Hyun Lee),한경희(Kyung-Hee Han) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.11월
Since the residential load is an AC load and the output of solar cell is a DC power, the photovoltaic system needs the DC/AC converter to utilize solar cell. In case of driving to interact with utility line, in order to operate at unity power factor, converter must provide the sinusoidal wave current and voltage with same phase of utility line. Since output of solar cell is greatly fluctuated by insolation, it is necessary that the operation of solar cell output in the range of the vicinity of maximum power point. In this parer, DC/AC converter is three phase PWM converter with smoothing reactor. And then, feedforward control used to obtain a superior characteristic for current control and digital PLL circuit used to detect the phase of utility line.