• 제목/요약/키워드: Electric Control

검색결과 4,651건 처리시간 0.03초

에어컨부하 직접 제어시스템 실용화 연구 (Direct Load Control System for Air-conditioner)

  • 고상천;이상윤;김명수
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1999년도 하계학술대회 논문집 G
    • /
    • pp.3051-3053
    • /
    • 1999
  • In recent years, it becomes a worldwide trend that the power utilities focus their attention to Demand Side Management. Increasing Electric power consumption, they adopt a direct load management to accomplish low cost and stability of electric supply. Following this trend, KEPCO is researching a Direct Load Control System for Air Conditioner. This Paper presents the development results of the Direct Load Control System to Control electric power consumption of Conditioner in summer period this year.

  • PDF

트랙터의 전후진 자동 변속을 위한 전자식 액추에이터의 위치 제어 시스템 개발 (Development of Electric Actuator Position Control System for Automatic Shuttle Shifting of Tractor)

  • 최창현;우미나;이대현;김용주;정진희
    • Journal of Biosystems Engineering
    • /
    • 제35권4호
    • /
    • pp.224-230
    • /
    • 2010
  • The purpose of this study was to develop position control system of an electric actuator for automatic shuttle shifting of a tractor. The electric actuator was installed at the link of the forward-reverse gearshift of the tractor transmission, and controlled in the ranges of forward, neutral, and reverse positions. The position control system of the electric actuator was developed based on PID (Proportional Integral Derivative) controller and transfer function of the electric actuator. The coefficients of the PID controller were determined by Ziegler-Nichols (Z-N) method and optimized using simulation program. The prototype AMT (Automated Manual Transmission) test unit of the tractor was installed and used to evaluate the performance of the position control. The evaluation system for the control performance consisted of forward-reverse actuator, motor driver, and controller. The tests were conducted as the controlled positions of the actuator were changed from neutral position to forward, neutral, and reverse positions in sequence. The sequential tests were repeated 20 times. The operations of changing the gearshift were considered as the step response of the control system. Maximum overshoot, settling time, and steady-state error were analyzed. The results showed that performance of the position control system was reasonable and qualified. The maximum overshoots, the steady-state errors, and the settling times of the position control system were 10~20%, 1~5%, and 0.92~1.49 sec, respectively. The modifications of the electric actuator will be required to enhance the performance of position control during field operation.

Modeling and an Efficient Com bined Control Strategy for Fuel Cell Electric Vehicles

  • Lee, Nam-Su;Shim, Seong-Yong;Ahn, Hyun-Sik;Choi, Joo-Yeop;Choy, Ick;Kim, Do-Hyun
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2004년도 ICCAS
    • /
    • pp.1629-1633
    • /
    • 2004
  • In this paper, we first implement the simulation environment to investigate the efficient control method of a Fuel Cell Electric Vehicle (FCEV) system with battery. The subsystems of a FCEV including the fuel cell system, the electric motor (including the power electronics) and the tansmission (reduction gear), and the auxiliary power source (battery) are mathematically fomulated and coded using the Matlab/Simulink software. Some examples are given to show the capabilities of the modeled system and d a basic control strategy is examined for the economic energy distribution between the fuel cell and the auxiliary power source. It is illustrated by simulations that the actual vehicle velocity follows the given desired velocity pattern while both SOC control and power distribution control are being performed.

  • PDF

strict-feedback 비선형 시스템의 출력궤환 적응 신경망 제어기 (Adaptive Output-feedback Neural Control for Strict-feedback Nonlinear Systems)

  • 박장현;김일환;김성환;문채주;최준호
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2006년도 전력전자학술대회 논문집
    • /
    • pp.526-528
    • /
    • 2006
  • An adaptive output-feedback neural control problem of SISO strict-feedback nonlinear system is considered in this paper. The main contribution of the proposed method is that it is shown that the output-feedback control of the strict-feedback system can be viewed as that of the system in the normal form. As a result, proposed output-feedback control algorithm is much simpler than the previous backstepping-based controllers. Depending heavily on the universal approximation property of the neural network (NN) only one NN is employed to approximate lumped uncertain nonlinearity in the controlled system.

  • PDF

Field Weakening Control of a PM Electric Variable Transmission for HEV

  • Cheng, Yuan;Bouscayrol, Alain;Trigui, Rochdi;Espanet, Christophe;Cui, Shumei
    • Journal of Electrical Engineering and Technology
    • /
    • 제8권5호
    • /
    • pp.1096-1106
    • /
    • 2013
  • This paper presents the control of a Permanent Magnet Electric Variable Transmission (PM-EVT) for Hybrid Electric Vehicles (HEVs). Consisting of two electric machines, the EVT realizes the power split function in an electromagnetic way rather than in a mechanical way. A specific PM-EVT has been designed for Toyota Prius II. The control scheme of the entire vehicle is deduced using the Energetic Macroscopic Representation methodology. The energy management strategy yields local control references. A specific attention is paid for the field weakening for wide speed range. Simulation results are provided to illustrate the EVT modeling and control.

Power Distribution and Coordinated Control for a Power Split Hybrid Electric Bus

  • Wang, Feng;Zhong, Hu;Ma, Zi-Lin;Mao, Xiao-Jian;Zhuo, Bin
    • Journal of Electrical Engineering and Technology
    • /
    • 제3권4호
    • /
    • pp.593-598
    • /
    • 2008
  • The power distribution is proposed to determine the target operating points of the system components as the basis for maximal the efficiency of the overall system for a power split dual electric machine hybrid electric bus. The coordinated control is constructed on the basis of the power distribution. The basic coordinated control is implemented to satisfy the driver's power demand, in which both the dynamic characteristics of the engine and the dual electric machine are explicitly taken into account. Moreover, the improved coordinated control is suggested to suppress engine dynamic operation and rich fuel injection.

A Study on Development of Educational Model of Subjects of Electric, Electronic and Control for Marine Engineer in Accordance with STCW 2010 Amendments

  • Lee, Young-Chan;Jung, Byung-Gun;Kim, Jong-Su;Yun, Yong-Sup
    • 해양환경안전학회지
    • /
    • 제21권3호
    • /
    • pp.290-296
    • /
    • 2015
  • This paper presents a novel educational model of subjects of electric, electronic and control for marine engineer in accordance with STCW 2010 amendments. In accordance with STCW 2010, contents of such courses in marine engineering operations of undergraduate programs in maritime university should be updated correspondingly to new features. In order to propose the model, this paper analyses and reviews subjects on electric, electronic and control in STCW convention compared to STCW 1995. Also, in this paper, subjects of electric, electronic and control in marine engineering operations in Korea and other countries are analyzed and a new educational model is proposed. in theoretical perspective and practical perspective.

Development of a Hydro Turbine Governor and Validation Test

  • 김종안;우주희;최인규
    • KEPCO Journal on Electric Power and Energy
    • /
    • 제1권1호
    • /
    • pp.105-108
    • /
    • 2015
  • A digital Governor (GOV) has been developed for being used for a Francis hydro turbine, and the validity of the GOV has been tested. As for the hardware system for the GOV, we purchased a basic digital control system that already had proven its reliability in the power industry. We developed a set of new GOV software and integrated it with the hardware system, and finally verified the performance of the whole GOV system. For the human-machine interface (HMI), we configured and implemented appropriate graphic interfaces for the turbine operations. This paper describes the major GOV control functions, approaches we took in developing the GOV control logics, and the validity tests and the results.

On the Use of a Dimmer for a Robust Frequency Control of a Self-Excited Three-Phase Induction Wind Generator

  • Touti, Ezzeddine;Pusca, Remus;Manata, Jean-Paul;Brudny, Jean Francois;Chaari, Abdelkader
    • Journal of Power Electronics
    • /
    • 제14권3호
    • /
    • pp.580-591
    • /
    • 2014
  • This paper concerns a three-phase self-excited induction generator used for autonomous power generation. It presents a robust control strategy which makes it possible to maintain the frequency quasi constant during the voltage regulation without any control loop on this variable. This strategy, which also prevents the machine disengagement, uses as power converter a simple dimmer. The obtained theoretical and/or numerical results are validated on a laboratory test bench that allows the analysis of this control law effectiveness.

2-전동기 구동형 전기자동차의 추진 제어 알고리즘 개발 (Development of Traction Control Algorithm for 2-Motor driven Electric Vehicle)

  • 변성훈;박정우;정종진;김흥근
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1996년도 추계학술대회 논문집 학회본부
    • /
    • pp.359-362
    • /
    • 1996
  • This paper describes a development of traction control algorithm to investigate dynamic behavior of 2-motor driven electric vehicle. A electric vehicle is represented by a nonlinear seven degree of freedom including accelerations of wheels, longitudinal, lateral, and yaw motions. A nonlinear control algorithm is proposed in order to enhance the driveability of the electric vehicle with torque split control system. With the proposed control algorithm, numerical simulations are performed to analyze the dynamic behavior of the electric vehicle.

  • PDF