• 제목/요약/키워드: digital motor control center

검색결과 40건 처리시간 0.025초

부하제어 기능을 갖는 디지털형 전동기제어반의 설계 및 구현 (Design and Implementation of Digital Motor Control Center Including Load Control Function)

  • 우천희;강신준;이덕규;구영모;김학배;이성환
    • 제어로봇시스템학회논문지
    • /
    • 제5권7호
    • /
    • pp.868-875
    • /
    • 1999
  • In this paper, digital motor control center using protection relay is developed in order to protect power systems by means of timely fault detection and diagnosis during operation for induction motor which have various load environments and capacities in power systems. Digital motor control center is employed by power supervisory control systems without separate remote terminal unit and transducers adding communicational ability. Also we develope a maximum demand controller to control the load effectively at peak status and a power factor controller to minimize real power losses and improve the power factor. Therefore, when using the developed controller, real time computation is possible by loading DSP in hardware and applying real-time kernel which can convert each algorithm to task module.

  • PDF

저압모터용 디지털 전자 배전반 개발 (Digital Electronic Control Center for Low Voltage Motors)

  • 김성룡;김성호;고강훈;이현우
    • 한국조명전기설비학회:학술대회논문집
    • /
    • 한국조명전기설비학회 2004년도 춘계학술대회 논문집
    • /
    • pp.463-468
    • /
    • 2004
  • The digital motor protection, measuring and control equipment, as called "The digital motor control equipment", for applying to single/three phase motors designed an integrated one unit and manufactured a compact size which will be installed on the motor control center. It performs serveral protection functions and motor starting function, and measures and indicates a serveral measurement. This paper proposes the design concept and functionality of new digital motor control equipment to improve control performance and integrate several equipments for the control and protection of the motor.

  • PDF

Full digital control of permanent magnet AC servo motors

  • Lee, Jin-Won;Kim, Dong-Il;Jin, Sang-Hyun;Oh, In-Hwan;Kim, Sungkwun
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
    • /
    • pp.218-223
    • /
    • 1993
  • In this paper, we present a full digital control scheme which controls currents and speed of the permanent magnet AC servo motor with large range of bandwidth and high performance. The current equations of the permanent magnet AC servo motor are linearized by feedback linearization technique. Both acceleration feedforward terms and IP controllers, whose gains are functions of motor speed, are used in order to control motor currents. In addition the phase delays in current control loops are compensated by placing phase lead-lag compensators after current commands, which make it possible to avoid high gains in the current controllers. Unity power factor can be achieved by the proposed current controller. Pulsewidth modulation is performed by way of the well-known comparison with a triangular carrier signals. The velocity controller is designed on the basis of the linearized model of the permanent magnet AC servo motor by the proposed current controller. The performance of the entire control system is analyzed in the presence of uncertainty in the motor parameters. The proposed control scheme is implemented using the digital signal processor-based controller composed of an Analog Device ADSP 2111 and a NEC78310. The pulsewidth modulation (PWM) signals are generated through a custom IC, SAMSUNG-PWM1, which has the outputs of current controllers as input. The experimental results show that the permanent magnet AC servo motor can be always driven with high dynamic performance by the proposed full digital control scheme of motor speed and motor current.

  • PDF

중용량 전동기보호를 위한 전류형 디지털 보호계전기 개발 (Development of Current-based Compact Digital Protective Relay for Induction Motor Protection)

  • 정종진;김중표;신종한;박장수
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
    • /
    • pp.140-142
    • /
    • 2005
  • This paper describes the current- based compact digital motor protective relay for low and high voltage induction motors, which are widely used in industrial and commercial power systems. The existing protective relays for motor protection had only overload, short circuit, reverse phase, open circuit and grounding protective elements, and measurement, start/stop control function. But in present day, for automation system, various functions are required, especially motor management and sequence control function and more. To meet these requirements, we developed an economic current-based compact digital motor protective relay which had various function to control, manage and monitor the induction motor.

  • PDF

디지틀형 MOTOR CONTROL CENTER 개발 (Development of a Digital Motor Control Center)

  • 변영복;조기연;김요희
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1989년도 하계종합학술대회 논문집
    • /
    • pp.563-566
    • /
    • 1989
  • Drive malfunction take many forms and every possible one must be protected against. Until recently a separate analog device was needed for each type of malfunction. In this approach to simplified, more reliable motor-circuit protection and control, a microprocessor's digital controller for motor control center simultaneously examine most of the possible sources of circuit trouble and has more efficent functions (sequence control,display) than the conventional motor control center. The result of standard surge tests provided a realistic evaluation of the surge withstand capability of equipment.

  • PDF

Web-based Servo Motor Controller Design with Real-time Micro Embedded Operating System

  • Kim, Ga-Gue;Lee, Hyung-Seok
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2004년도 ICCAS
    • /
    • pp.1655-1658
    • /
    • 2004
  • In this paper, we design and implement remote servo motor control system with real-time micro embedded operating system. The system, where controller and camera image grabber are mounted, handles control commands transmitted from a remote PC web browser. A hard real-time servo motor driver running on the real-time micro embedded OS and then a digital control application which confirms precise sampling time intervals is constructed. Frame grabber images transmitted from camera are saved in a image data format to view on remote PC web browser.

  • PDF

고성능 벡터제어 유도기 구동장치의 모델링과 시뮬레이션 (Modeling and Simulation of A High Performance Vector Controlled Induction Motor Drive)

  • 김종구;최욱돈;손진근;이종찬;김진식
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1994년도 하계학술대회 논문집 A
    • /
    • pp.366-368
    • /
    • 1994
  • This paper deals with the vector control that control of torque and speed of the induction motor using field-oriented control method. Rotor flux is estimated using the indirect sensing method based on the rotor circuit equation in the synchronously rotation reference frame, and slip angle and rotor position are caculated from rotor angular velocity and stator current. Through modeling and digital simulation with a voltage source inverter, it is shown that the proposed scheme gives good static and dynamic performance to the induction motor drive.

  • PDF

A STUDY ON THE SPEED CONTROL OF AC SERVO MOTOR BY TIME CONSTANT

  • Kim, Pyoung-Ho;Park, In-June;Baek, Hyung-Lae;Chung, Byung-Ho
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
    • /
    • pp.325-329
    • /
    • 1998
  • This paper describes the controller for the improving speed control of the AC servo motor. The microprocessor provides an output to the difference in command. the servo system improves the characteristics of speed control. When the motor is running at the same speed as set by the reference signal, the speed encoder also provides a signal of the same frequency. Thus, the microprocessor controlled digital techniques enable to realize the flexible performance and control which was possible with time constant of linear acceleration/deceleration. We can know that optimal speed of machining center is 75msec in 30000mm/min and actually, 75msec is using on machining center. Finally experimental results prove excellent performance of this control system. This can be reduced error with more exact measure of actual speed. The system can be adaptable to CNC machine.

  • PDF

교류서보모터의 시정수에 의한 속도 제어특성 (Control Characteristics of Speed Using Time Constant on the AC Servo Motor)

  • 김평호;박인준;정병호;오금곤;백형래
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 1998년도 전력전자학술대회 논문집
    • /
    • pp.347-351
    • /
    • 1998
  • This paper describes the controller for the improving speed control the AC servo motor. The microprocessor provides an output to the difference in command. The servo system improves the characteristics of speed control. When the motor is running at the same speed as set by the reference signal, the speed encoder also provides a signal of the same frequency. Thus, the microprocessor controlled digital techniques enable to realize the flexible performance and control which was possible with time constant. We can know that optimal speed of machining center is 75msec in 30000mm/min and actually, 75msec is using on machining center. Finally experimental results prove excellent performance of this control system. This can be reduced error with more exact measure of actual speed. The system can be adaptable to CNC machine.

  • PDF

초정밀 조미동 위치결정기구의 설계 및 제어에 관한 연구 (A Study on the Design and Control Super-Precision Coarse and Fine Positioning Apparatus)

  • Kim, J.Y.;Cho, Y.T.;O, S.M.;Park, K.H.
    • 한국정밀공학회지
    • /
    • 제13권10호
    • /
    • pp.88-93
    • /
    • 1996
  • The study was carried out development a pricision positioning apparatus, consisting of DG servo motor and piezoelectric actuatior. This system is composed of fine and coarse apparatus, measurement system and control system. Peezoelectric actuator is designed for fine positioning. Coarse positioning using lead screw is droved by DC servo motor. Control system output a signal from laser interfermeter and capacitive sensor to amplifer of DC servo motor and piezoelectric actuator after digital signal processing (DSP). Resolution of this apparatus measure with laser interferometer and microsense

  • PDF