• Title/Summary/Keyword: Gopinath State Observer

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Sensorless Vector Control of IPMSM Drive with Adalptive Fuzzy Controller (적응 퍼지제어기에 의한 IPMSM 드라이브의 쎈서리스 벡터제어)

  • Kim Jong-Gwan;Park Byung-Sang;Chung Dong-Hwa
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.55 no.2
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    • pp.98-106
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    • 2006
  • This paper proposes to position and speed control of interior Permanent magnet synchronous motor(IPMSM) drive without mechanical sensor. Also, this paper develops a adaptive fuzzy controller based fuzzy logic control for high performance of PMSM drives. In the proposed system, fuzzy control is used to implement the direct controller as well as the adaptation mechanism. A Gopinath observer is used for the mechanical state estimation of the motor. The observer was developed based on nonlinear model of IPMSM, that employs a d-q rotating reference frame attached to the rotor. A Gopinath observer is implemented to compute the speed and position feedback signal. The validity of the proposed scheme is confirmed by various response characteristics.

Sensorless Control of IPMSM with Adaptive-Fuzzy State Observer (적응-퍼지 상태관측기에 의한 IPMSM의 센서리스 제어)

  • Jung Taek-Gi;Lee Jung-Chul;Lee Hong-Gyun;Lee Young-Sil;Chung Dong-Hwa
    • Proceedings of the KIPE Conference
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    • 2003.11a
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    • pp.186-189
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    • 2003
  • This paper is proposed to position and speed control of interior permanent magnet synchronous motor(IPMSM) drive without mechanical sensor. A gopinath observer is used for the mechanical state estimation of the motor. The observer was developed based on nonlinear model of IPMSM, that employs a d-q rotating reference frame attached to the rotor, A gopinath observer is implemented to compute the speed and position feedback signal. The validity of the proposed scheme is confirmed by various response characteristics.

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Modeling and State Observer Design for Roll Slip in Cold Cluster Mills (냉간압연 다단 압연기의 롤 슬립 모델링 및 상태 관측기 설계)

  • Kang, Hyun Seok;Hong, Wan Kee;Hwang, I Cheol
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.12
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    • pp.1543-1549
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    • 2012
  • This study focuses on the state space model and the design of a state observer for the slip dynamics between rolls in STS cold cluster mills. First, a mathematical model of the roll slip is given as a nonlinear differential equation. Then, by using a Taylor series expansion, it is linearized as a state space model. Next, by using Gopinath's algorithm, a minimal-order state observer based on the state space model is designed to estimate the angular speed of all idle rolls except for an actuated roll that is measureable. Finally, a computer simulation is used to validate that the proposed state space model very well describes slip dynamics between, and moreover, the state observer very well estimates the angular speed of the idle roll.

Sensorless Control of IPMSM using State Observer (상태관측기를 이용한 IPMSM의 센서리스 제어)

  • Song, Jae-Joo;Lee, Jeong-Cheol
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.05b
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    • pp.71-74
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    • 2003
  • The paper is proposed to position and speed control of interior permanent magnet synchronous motor(IPMSM) drive without mechanical sensor. A minimum order state observer is used for the mechanical state estimation of the motor. The observer was developed based on nonlinear model of IPMSM, that employs a d-q rotating reference frame attached to the rotor. A minimum order state 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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The Improvement of low speed driving characteristics of induction motor by inertia moment identification. (관성 모멘트 동정에 의한 유도전동기의 저속운전 특성개선)

  • 이성근
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.2 no.4
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    • pp.627-634
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    • 1998
  • This paper proposes an algorithm which improves capacity of a state observer and low speed driving characteristics of a induction motor by inertia moment identification. In induction motet driving systems, it is difficult to obtain the accurate speed information by a low resolution encoder because the encoder pulses are very few in a low speed range. To improve this problem, state observer based on the Gopinath' theory which estimates speed and disturbance was designed, and disturbance rejection control was realized by application of the observer. Also, inertia moment of the motor was estimated and the nominal inertia of the observer was identified to minimize the error of estimated speed and disturbance. From the simulation and experimental results, it is showed that the proposed observer improved the transient response characteristics in low speed region below 6[rpm].

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