• 제목/요약/키워드: Electric Drive

검색결과 660건 처리시간 0.045초

High Performance Adjustable-Speed Induction Motor Drive System Incorporating Sensorless Vector Controlled PWM Inverter with Auto-Tuning Machine-Operated Parameter Estimation Schemes

  • Soshin, Koji;Okamura, Yukiniko;Ahmed, Tarek;Nakaoka, Mutsuo
    • Journal of Power Electronics
    • /
    • 제3권2호
    • /
    • pp.99-114
    • /
    • 2003
  • This paper presents a feasible development on a highly accurate quick response adjustable speed drive implementation fur general purpose induction motor which operates on the basis of sensorless slip frequency type vector controlled sine-wave PWM inverter with an automatic tuning machine parameter estimation schemes. In the first place, the sensorless vector control theory on the three-phase voltage source-fed inverter induction motor drive system is developed in slip frequency based vector control principle. In particular, the essential procedure and considerations to measure and estimate the exact stator and rotor circuit parameters of general purpose induction motor are discussed under its operating conditions. The speed regulation characteristics of induction motor operated by the three-phase voltage-fed type current controlled PWM inverter using IGBT's is illustrated and evaluated fur machine parameter variations under the actual conditions of low frequency and high frequency operations for the load torque. In the second place, the variable speed induction motor drive system, employing sensorless vector control scheme which is based on three -phase high frequency carrier PWM inverter with automatic toning estimation schemes of the temperature -dependent and -independent machine circuit parameters, is practically implemented using DSP-based controller. Finally, the dynamic speed response performances for largely changed load torque disturbances as well as steady state speed vs. torque characteristics of this induction motor control implementation are illustrated and discussed from an experimental point of view.

BLDC 구동을 위한 단일 옵토 카플러에 의한 저가형 위치센서에 관한 연구 (The study on Low-cost Position Sensor by a Single Opto-coupler for BLDC Drive)

  • 권순재;김영수
    • 동력기계공학회지
    • /
    • 제20권3호
    • /
    • pp.22-28
    • /
    • 2016
  • Energy consumption rapidly increases with industrial development. therefore an interest in the efficiency of various power converters is increasing. Especially, the field of high-efficiency small motors widely distributed for industrial and family use is considered a very important field in terms of efficient energy usage, and accordingly, in the field of small electric equipment, the use of BLDC that allows high-efficiency drive in an inductor gradually increases. However, for the BLDC drive, information on the position of the rotor is essential. Both methods using a magnetic encoder and an optical encoder to detect the information on the position of the rotor obtain the information by three position sensitive devices, and if any one of these position sensitive devices fails to function, no positional information can be obtained, so there is a limitation in implementing a position sensor with high reliability. In the paper, proposes a new type of encoder that can obtain the positional information on the position of the rotor using a single position sensor in order to overcome the issues that it has to use numerous signal flows and that the reliability is reduced for the acquisition of positional information generated by using multiple position detectors. The encoder in the proposed method replaced the function of generating positional information from multiple sensors with the shape of the encoder plate and the capture function of MICOM. In order to verify the validity of the position detection technique by the proposed encoder, a prototype was produced, and an experiment using the capture function of DSP was conducted through this.

Development of simulation model of an electric all-wheel-drive vehicle for agricultural work

  • Min Jong Park;Hyeon Ho Jeon;Seung Yun Baek;Seung Min Baek;Dong Il Kang;Seung Jin Ma;Yong Joo Kim
    • 농업과학연구
    • /
    • 제51권3호
    • /
    • pp.315-329
    • /
    • 2024
  • This study was conducted for simulation model development of an electric all-wheel-drive vehicle to adapt the agricultural machinery. Data measurement system was installed on a four-wheel electric driven vehicle using proximity sensor, torque-meter, global positioning system (GPS) and data acquisition (DAQ) device. Axle torque and rotational speed were measured using a torque-meter and a proximity sensor. Driving test was performed on an upland field at a speed of 7 km·h-1. Simulation model was developed using a multi-body dynamics software, and tire properties were measured and calculated to reflect the similar road conditions. Measured and simulated data were compared to validate the developed simulation model performance, and axle rotational speed was selected as simulation input data and axle torque and power were selected as simulation output data. As a result of driving performance, an average axle rotational speed was 115 rpm for each wheel. Average axle torque and power were 4.50, 4.21, 4.04, and 3.22 Nm and 53.42, 50.56, 47.34, and 38.07 W on front left, front right, rear left, and rear right wheel, respectively. As a result of simulation driving, average axle torque and power were 4.51, 3.9, 4.16, and 3.32 Nm and 55.79, 48.11, 51.62, and 41.2 W on front left, front right, rear left, and rear right wheel, respectively. Absolute error of axle torque was calculated as 0.22, 7.36, 2.97, and 3.11% on front left, front right, rear left, rear right wheel, respectively, and absolute error of axle power was calculated as 4.44, 4.85, 9.04, and 8.22% on front left, front right, rear left, and rear right wheel, respectively. As a result of absolute error, it was shown that developed simulation model can be used for driving performance prediction of electric driven vehicle. Only straight driving was considered in this study, and various road and driving conditions would be considered in future study.

Discrete Track Recording Media for High Capacity Hard Disk Drive

  • Lee, Hyung-J.;Che, Xiaodong;Moon, Ki-Seok;Tang, Yawshing;Kim, Na-Young;Moneck, Matthew;Zhu, Jian-Gang;Takahashi, Nobuyuki
    • 한국자기학회:학술대회 개요집
    • /
    • 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
    • /
    • pp.178.2-178.2
    • /
    • 2007
  • PDF

전기 및 전기유압구동 시스템에서 댐핑증대를 통한 성능향상 해석 연구 (An analytical Study on the Performance Improvement for Both Electric and Elecro-hydraulic Type High Power Drive System through Damping Factor)

  • 이대옥;안태영
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 1993년도 추계학술대회 논문집
    • /
    • pp.286-292
    • /
    • 1993
  • The classical way to improve the control performance is studied on the aspects of gun/turret deive systens. Two ways are discussed comparadively ; electrical case and electro-hydraulic case. System parameters are analytically studied in terms of resonance frequencies, and damping and gear train ratio effects are checked in relation to resonance frequency increase. Benefit of the feedback is discussed to increase the damping of the natural frequency lending to bandwidth increase.

  • PDF

Long period application of AC field causing contrast reduction of IPS cell

  • Momoi, Yuichi;Koda, Tomonori
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
    • /
    • pp.870-872
    • /
    • 2008
  • It is known that AC electric field to drive IPS mode of liquid crystal display (LCD) causes reduction of the contrast after long period of display operation. Our results are presented in this paper on a base of a model of interaction between surface of PI alignment film and LC molecules. We conclude that the surface viscosity of PI alignment film is one of the most important factors for the contrast reduction phenomenon.

  • PDF

SRM의 최대 토크, 효율 및 최소 토크리플 운전을 위한 스위칭 각 (Switching Angle for Maximizing Torque, Efficiency and Minimizing Torque Ripple in SRM Drive)

  • 김현덕;차현록;김광헌;나석환;임영철
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 1999년도 전력전자학술대회 논문집
    • /
    • pp.151-154
    • /
    • 1999
  • This paper presents a driving method of 3-phase 4-poles SRM(switched reluctance motor) drived by switching angle control. In this study, the switching angle is determined from approximated analysis and computer simulation by using MATLAB for high efficiency according to the speed and torque required by load, and then microcontroller controls the switching angle of asymmetrical inverter in SRM driver. Also, we experiment the maximum forque driving and maximum power driving by controlling switching angle available to electric vehicle.

  • PDF

A Study on the load control using electric inertia

  • Kim, Gil-Dong;Park, Hyun-Jun;Han, Young-Jae;Jang, Dong-Yuk;Jo, Jung-Min
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2001년도 ICCAS
    • /
    • pp.128.1-128
    • /
    • 2001
  • A propulsion system apparatus is needed for a railroad vehicle to test and estimate propulsion performance. The electrical inertia simulator to facilitate the development and testing of propulsion systems, is presented in this paper. It is based on a vector-controlled Induction motor drive supplied from the AC mains through a double PWM converter that provides desirable features such as hi-directional power folw, nearly unity power factor and low harmonic factor at the Ac mains. A theoretical analysis is first presented, followed by a detailed simulation study to assess the overall system performance under dynamic conditions.

  • PDF

전기자전거용 BLDC 구동장치 개발 (Drive Control System of InWheel Type BLDC for Electric Bicycle)

  • 김영기;최승철;이진우;정교범;목형수
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2010년도 하계학술대회 논문집
    • /
    • pp.63-64
    • /
    • 2010
  • 본 논문에서는 전기자전거용 BLDC를 구동할 수 있는 구동제어시스템을 설계하였으며, BLDC 전동기와 구동원리에 대해 특성을 파악하였다. 제어보드는 TI사의 TMS320F2808을 이용하여 6-스텝 인버터를 구동하였으며, PI제어를 적용하여 전류제어를 통해 전기자전거용 BLDC 구동장치를 구현 하였다.

  • PDF

전기자전거의 BLDC 구동제어시스템 설계 및 구현 (Design and Implementation of BLDC Drive Control System for Electric Bicycle)

  • 조성남;손영대;김철진
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2008년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
    • /
    • pp.136-138
    • /
    • 2008
  • 본 논문에서는 전기자전거에 응용할 수 있는 BLDC 전동기의 구동제어시스템을 설계하였으며, 시뮬링크를 이용한 시뮬레이션을 통해 BLDC 전동기와 그 구동제어시스템의 특성파악을 수행 하였다, 모터 컨트롤 전용 16비트 마이크로컨트롤러인 dsPIC30F3010을 탑제하여 시스템을 설계하였으며, 2상 여자 제어법을 적용하여 6-스텝 인버터를 구동하고, PID 연산을 수행, 속도제어 방법을 통하여 전기자전거에 사용할 수 있는 BLDC 전동기의 구동제어시스템을 구현 하였다.

  • PDF