• Title/Summary/Keyword: 벡터센서

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Adaptive filter and Fuzzy Controller for Speed Sensor-Less Vector Control of Induction Motor (적응필터와 퍼지제어기를 이용한 유도전동기의 속도센서 없는 벡터제어)

  • Kim, Sang-Uk;Yang, Lee-Woo;Kim, Young-Seok
    • Proceedings of the KIEE Conference
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    • 1994.07a
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    • pp.273-276
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    • 1994
  • It has been known the fact that extended Kalman filter (EKF) is correctly capable of estimating system parameters and state variables by eliminating virtually all influences of structural noises, and fuzzy controller is robust to parameter variations. this paper presents a design method of Reduced-Order EKF and fuzzy controller which consists of the rotor speed and the rotor flux estimation only by measuring stator currents. Experiment results show that both the rotor speed and the rotor flux can be prominently estimated in a wide range of the speed.

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Speed Sensorless Vector Control of Induction Machine in the Field Weakening Region (약계자영역에서 유도전동기의 속도센서리스 벡터제어)

  • Sin, Myeong-Ho;Hyeon, Dong-Seok
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.50 no.10
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    • pp.508-512
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    • 2001
  • This paper investigates the problem of the speed estimation of conventional speed sensorless stator flux-oriented induction machine drive in the field weakening region and proposes a new speed estimation scheme to estimate speed exactly in transients in the field weakening region. The error included in the estimated rotor speed is removed by not a low pass filter but Kalman filter so that exact speed estimation in transients is achieved.

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Improving accuracy of SNS-based Disaster Notification System using Morphological Analysis and Artificial Neural Network (형태소분석과 인공신경망을 활용한 SNS 기반 재난알림시스템의 정확도 향상)

  • Lee, Dong-Ho;Kang, Suk-Min;Kim, Soo-Hyun;Jo, Sung-Jae;Park, Chan-Hyuk
    • Proceedings of the Korea Information Processing Society Conference
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    • 2017.11a
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    • pp.881-884
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    • 2017
  • 스마트 디바이스가 대중화 되면서 각종 사건 사고에 대한 데이터가 SNS 상에 실시간으로 업데이트 된다. SNS의 이런 특성을 이용하여 이용자 개개인이 사고감지센서의 역할을 하면 빠른 사고감지가 가능하다. 하지만 기존 연구들은 단순히 키워드의 출현 빈도로 사고를 판단하는 방식과, 문법파괴 요소가 많은 트위터의 특성으로 인해 정확성에서 한계를 보인다. 본 연구에서는 사고감지의 정확도를 높이기 위해 형태소로 분석한 트윗을 벡터화하여 다층퍼셉트론신경망으로 학습시키는 모델을 구현하였다. 연구 결과 일반명사로 이루어진 40개의 단어를 사용했을 때 가장 높은 82.58%의 정확도를 얻었다.

Speed Sensorless Vector Control for High Performance of Induction Motor (유도전동기의 고성능제어를 위한 속도센서리스 벡터제어)

  • Dong Hwa Chung
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.30B no.11
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    • pp.37-46
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    • 1993
  • Recently, the elimination of speed sensors has been one of the important requirement in vector control systems, because the speed sensor spoil the ruggedness and simplicity of induction motor. This paper proposes sensorless vector control for high performance of induction motor. The proposed vector control scheme is based on a rotor flux and speed which are calculated from the stator voltage and currents with improved flux estimator. The characteristics of vector control employing stator voltage and current generally deteriorate as the speed gets lower acause the calculated rotor flux depends on the stator resistance and it is difficult to calculate rotor flux at low speed of standstill. This new control system is robust with respect to variations of the stator resistance and it makes possible to calculated rotor flux at low speed of standstill. These feature are verified by the simulation results.

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Sensorless Vector Control of IPMSM Using Reduced Order Observer (저감 차수 관측기를 이용한 IPMSM의 센서리스 벡터제어)

  • Lee, Hong-Gyun;Lee, Jung-Chul;Chung, Dong-Hwa
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.52 no.4
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    • pp.161-166
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    • 2003
  • This paper proposes a sensorless vector control of interior permanent magnet synchronous motor(IPMSM) using a reduced order observer. This method introduce the auxiliary control inputs that can eliminate the nonlinear term in the electrical equations and realize the linearization of the motor model. The rotor speed estimate with the observer that needs only the q-axis current. The rotor position calculate using the estimated rotor speed. The speed and position control implement with the estimated value. The validity of the proposed scheme is confirmed by various response characteristics.

Sensorless Vector Control of Induction Motor with HAI Controller (HAI 제어기에 의한 유도전동기의 센서리스 벡터제어)

  • Lee, Jung-Chul;Lee, Hong-Gyun;Chung, Dong-Hwa
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.54 no.2
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    • pp.73-79
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    • 2005
  • This paper is proposed hybrid artificial intelligent (HAI) controller based on the vector controlled induction motor drive system. The hybrid combination of fuzzy control and neural network will produce a powerful representation flexibility and numerical processing capability. Also, this paper is proposed speed estimation of induction motor using a closed-loop state observer. The rotor position is calculated through the stator flux position and an estimated flux value of rotation reference frame. A closed-loop state observer is implemented to compute the speed feedback signal. The results of analysis prove that the proposed control system has strong robustness to rotor parameter variation, and has good steady-state accuracy and transitory response.

Vector Control of Induction Motor without Speed Sensor Using a New Reduced-Order Extended Luenberger Observer (새로운 축소 차원 확장 루엔버거 관측기를 이용한 유도 전동기의 센서리스 벡터 제어)

  • Song, Joo-Ho;Lee, Kyo-Beum;Song, Joong-Ho;Choy, Ick;Lim, Myo-Taeg
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.1105-1107
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    • 2000
  • This paper proposes the new reduced-order extended Luenberger observer and presents the application to sensorless vector control of induction motor. The main features of the proposed observer are discussed and compared with the other observers.

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Design of High-Response Speed Control System for AC Servomotor Drive (유도형 교류 서보전동기의 고응답 구동회로 설계에 관한 연구)

  • 성영권;조철제
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.41 no.5
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    • pp.474-482
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    • 1992
  • This paper describes the speed control system of an induction type ac servomotor drive on the vector control basis of slip frequency and constant secondary flux control for a quick torque response. The system is composed of a digital controller using a SCB-V50 microprocessor and a PWM inverter with power MOSFETs for high speed switching. And, for the measurement of actual instantaneous currents, MDCS A070-051 hall sensors are employed. The rising time of step responce by this system through the test of a 600[W] ac servomotor is 30[ms]. Overall experimental result shows that the drive performance of the system is similar to that of a separately excited armature current control of a dc motior.

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Performance Improvement of Sensorless Vector Control for Induction Motor Drives Driven By Matrix Converter Using Non-Linearity Compensation and Disturbance Observer (비선형 모델링과 외란 관측기를 이용한 Matrix Converter로 구동되는 유도전동기 센서리스 벡터제어의 성능 개선)

  • Kyo-Beum Lee
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.53 no.8
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    • pp.500-508
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    • 2004
  • This paper presents a new sensorless vector control system for high performance induction motor drives fed by a matrix converter with non-linearity compensation and disturbance observer. The nonlinear voltage distortion that is caused by commutation delay and on-state voltage drop in switching device is corrected by a new matrix converter modeling. The lumped disturbances such as parameter variation and load disturbance of the system are estimated by the radial basis function network (RBFN). An adaptive observer is also employed to bring better responses at the low speed operation. Experimental results are shown to illustrate the performance of the proposed system.

Analysis and a Compensation Method for Torque Ripple caused by Position Sensor Error in PMSM's Vector Control (PMSM의 벡터제어시 위치센서 오차에 의해 발생하는 토오크 리플에 대한 해석과 그 보상 방법)

  • Lee, J.M.;Mok, H.S.;Choe, G.H.;Kim, S.H.;Cho, Y.H.
    • Proceedings of the KIPE Conference
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    • 2007.07a
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    • pp.205-207
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    • 2007
  • Position information is very important when driving the Permanent Magnet Synchronous Motor(PMSM). Generally, resolver is used to obtain exact position information. However, it generates periodic position errors due to the transformer ratio difference and excitation signal distortion. When the vector control is done with the position information that includes position error, torque ripple is periodically generated. This paper proposes the solution through analysis of above problem. Also, it’s validity is verified by simulation and experiment.

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