• 제목/요약/키워드: Adaptive speed observer

검색결과 156건 처리시간 0.022초

속도관측기를 활용한 영구자석동기전동기의 적응 백스테핑 제어기 설계 (Adaptive Backstepping Controller Design for a Permanent Magnet Synchronous Motor using Speed Observer)

  • 현근호;양해원
    • 제어로봇시스템학회논문지
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    • 제9권5호
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    • pp.347-353
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    • 2003
  • A nonlinear speed controller for a surface mounted permanent magnet synchronous motor (PMSM) based on a newly developed adaptive backstepping approach is presented To compensate parameter uncertainties and load torque disturbance, a nonlinear adaptive backstepping control law and adaptive law are derived systematically through virtual control input and suitable Lyapunov function. Also, speed observer without using costly speed sensor is presented. Simulation results show that the proposed controller can observe the speed and track the reference speed signal generated by a reference model.

새로운 적응 슬라이딩 모드 관측기를 이용한 PMSM 센서리스 속도 응답특성 향상 (Enhancement of the Speed Response of PMSM Sensorless Control Using A New Adaptive Sliding Mode Observer)

  • 김홍열;손주범;이장명
    • 전기학회논문지
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    • 제59권1호
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    • pp.160-167
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    • 2010
  • This paper proposes an adaptive sliding mode observer (SMO), which adds the estimation function of the stator resistance to a new sliding mode observer for the robust sensorless control of permanent magnet synchronous motor (PMSM) with variable parameters. To reduce the chattering problem commonly found in the conventional sliding mode observer where the low-pass filter and additional position compensation of the rotor are used, the sigmoid function is used for the control of a switching function in this research. With the estimation of the stator resistance, the proposed observer can improve the control performance by reducing the estimation error of the motor's speed. Note that the stator resistance is varying with the ambient temperature and becomes an error source for the sensorless control of PMSM. The new sliding mode observer has better efficiency than the conventional adaptive sliding mode observer by reducing the time consuming integral calculations. The stability of the proposed adaptive sliding mode observer is verified by the Lyapunov function in determining the observer gains, and the effectiveness of the observer is demonstrated by simulations and experiments.

적응 퍼지 관측기를 이용한 SPMSM 드라이브의 속도 센서리스제어 (Speed Sensorless Control of SPMSM with Adaptive Fuzzy and Observer)

  • 이영실;이정철;이홍균;남수명;정동화
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.173-176
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    • 2004
  • This paper is proposed to position and speed control of interior permanent magnet synchronous motor(SPMSM) drive without mechanical sensor. A adaptive fuzzy controller is applied for speed control of SPMSM drive A adaptive state observer is used for the mechanical state estimation of the motor. The observer was developed based on nonlinear model of SPMSM, that employs a d-q rotating reference frame attached to the rotor. A adaptive observer is implemented to compute the speed and position feedback signal. The validity of the proposed sensorless scheme is confirmed by various response characteristics.

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적응적분바이너리 관측기를 이용한 위치 및 속도 센서없는 영구자석 동기전동기의 속도제어 (A Speed Control of Permanent Magnet Synchronous Motor using an Adaptive Integral Binary Observer without Speed and Position Sensors)

  • 이정흠;최양광;김영석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.83-85
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    • 2003
  • This paper presents a speed control of permanent magnet synchronous motors (PMSM) using an adaptive integral binary observer without speed and position sensors. In view of composition with a main loop regulator and an auxiliary loop regulator, the binary observer has a property of the chattering alleviation in the constant boundary layer. In order to improve the steady state performance of the binary observer, the proposed adaptive integral binary observer is formed by adding extra integral dynamics to the switching hyperplane equation. The effectiveness of the proposed system is conformed by the experimental results.

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전영역에서 안정된 유도전동기의 센서리스 속도제어 (A Stable Sensorless Speed Control for Induction Motor in the Overall Range)

  • 김종수;김성환;오세진
    • Journal of Advanced Marine Engineering and Technology
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    • 제28권4호
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    • pp.641-647
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    • 2004
  • By most sensorless speed control schemes for induction motor. the control performances in high speed range are good, but it is difficult to obtain satisfactory results in low speed region. This paper proposes a new method controlling the low and the high speed regions separately to attain the stable operation in the overall range. The current error compensation method, in which the controlled stator voltage is applied to the induction motor so that the error between stator currents of the numerical model and the actual motor can be forced to decay to zero as time proceeds. is used in the low speed region In the high speed region. the method with adaptive observer is utilized. This control strategy contains an adaptive state observer for flux estimation. The rotor speed can be calculated from the rotor flux and the motor currents. The experimental results indicate good speed and load responses from the very low speed range to the high, and also show accurate speed changing performance between the low and the high speed range.

Sensorless Vector Control of Induction Motors for Wind Energy Applications Using MRAS and ASO

  • Jeong, Il-Woo;Choi, Won-Shik;Park, Ki-Hyeon
    • Journal of Electrical Engineering and Technology
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    • 제9권3호
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    • pp.873-881
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    • 2014
  • Speed sensorless modes of operation are becoming standard solution in the area of electric drives. This paper presents flux estimator and speed estimator for the speed sensorless vector control of induction motors. The proposed sensorless methods are based on the model reference adaptive system (MRAS) observer and adaptive speed observer (ASO). The proposed speed estimation algorithm can be employed in the power control of grid connected induction generator for wind power applications. Two proposed schemes are verified through computer simulation PSIM and compared their simulation results.

슬라이딩모드 적응 자속관측기를 이용한 불확실성을 갖는 유도전동기의 적응 백스테핑제어 (Adaptive Backstepping Control of Induction Motors with Uncertainties Using a Sliding Mode Adaptive flux Observer)

  • 이은욱;양해원
    • 대한전기학회논문지:시스템및제어부문D
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    • 제53권3호
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    • pp.154-160
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    • 2004
  • In this paper, a combined field orientation and adaptive backstepping approach using a sliding mode adaptive flux observer, is proposed for the control of induction motor In order to achieve the speed regulation with the consideration of improving power efficiency, rotor angular speed and flux amplitude tracking objectives are formulated. Rotor flux and inverse time constant are estimated by the sliding mode adaptive flux observer based on a fixed stator frame model and mechanical lumped uncertainty such as inertia moment, load torque disturbance, friction compensated by the adaptive backstepping based on a field-oriented model. Simulation results are provided to verify the effectiveness of the proposed approach.

슬라이딩 모드 축차 관측기를 이용한 유도 전동기 속도추정 (A Rotor Speed Estimation of Induction Motors Using Sliding Mode Cascade Observer)

  • 김응석
    • 대한전기학회논문지:시스템및제어부문D
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    • 제53권3호
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    • pp.145-153
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    • 2004
  • A nonlinear adaptive speed observer is designed for the sensorless control of induction motors. In order to design the speed observer, the measurements of the stator currents and the estimates of the rotor fluxes are used. The sliding mode cascade observer is designed to estimate the time derivatives of the stator currents. The open-loop observer is designed to estimate the rotor fluxes and its time derivatives using the stator current derivatives. The adaptive observer is also designed to estimate the rotor resistance. Sequentially, the rotor speed is calculated using these estimated values. It is shown that the estimation errors of the corresponding states and the parameters converge to the specified residual set. It is also shown that the speed controller using these estimates is performed well. The simulation examples are represented to investigate the validity of the proposed observers for the sensorless control of induction motors.

MRAS 관측기를 이용한 SRM의 속도 및 위치센서없는 제어 (The Control of Switched Reluctance Motor Using MRAS without Speed and Position Sensors)

  • 양이우;김진수;김영석
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
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    • 제48권11호
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    • pp.632-639
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    • 1999
  • SRM(Switched Reluctance Motor) drives require the accurate position and speed information of the rotor. These informations are generally provided by a shaft encoder or resolver. High temperature, EMI, and dust may make detection performance deteriorate. Therefore, the elimination of the position and speed sensor is desirable. In this paper, a nonlinear adaptive observer using the MRAS(Model Reference Adaptive System) is proposed. The rotor speed and position are estimated by the adaptation law using the real and estimated currents. The stability of the adaptive observer is proved by Lyapunov stability theory. The proposed methods are implemented with TMS320C31 DSP. Experimental results prove that the observer has a good estimation performance of the rotor speed and position despite of the parameter variations and loads, and the speed control can be accomplished in the wide speed range.

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폐루프 자속관측기를 이용한 유도전동기의 직접토크제어 (Direct Torque Control of Induction Motors Using Closed Loop Flux Observer)

  • 금원일;류지수;이기상
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.1046-1049
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    • 2000
  • A direct torque control(DTC) based sensorless speed control system which employs a new closed loop flux observer is proposed. The flux observer is an adaptive gain scheduling observer where motor speed is used as the scheduling variable. Adaptive nature comes from the fact that the estimates of stator resistance and speed are included as observer parameters. Simulation results show that the proposed flux observer gives better control and estimation results than conventional flux estimator specially in low speed region.

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