Design of Adaptive Observer for Sensorless Vector Control of IM under Regenerating Condition

Tamura, Yosuke; Sato, Ikuya; Kubota, Hisao; Ohta, H.; Hori, Yoichi

doi:10.1541/ieejias.122.790

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…Many speed estimation methods have been proposed and some have been put into practical use [1][2][3]. Methods of improving the estimation performance include, for example, identification of the primary and secondary resistances [4][5][6][7], optimum design of an observer [8], and high-frequency signal injection [9]. Conventional studies have also pointed out that in addition to optimization of the speed estimation method, it is also important to reduce the errors of the motor parameters, especially the primary resistance error at low speed, and that both speed estimation and primary resistance identification are apt to become unstable in regenerative operation [10,11].…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of induction motor speed sensor‐less vector control system using an adaptive observer with an estimated flux feedback in low‐speed range

Fukumoto

Kato

Kurita

et al. 2009

Electrical Engineering Japan

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SUMMARYBecause of various errors caused by the dead time of an inverter, temperature variation of resistances, and so on, speed estimation error is inevitable in speed sensor-less vector control of an induction motor. In particular, the speed control loop becomes unstable at near-zero frequencies. In order to solve these problems, this paper proposes a novel design of an adaptive observer for speed estimation. By adding a feedback loop of the error between the estimated flux and the flux command, the sensitivity of speed estimation and primary resistance identification is improved. The proposed system is analyzed and appropriate feedback gains are derived. Experimental results showed good performance in the low-speed range.

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Section: Introductionmentioning

confidence: 99%

Performance improvement of induction motor speed sensor‐less vector control system using an adaptive observer with an estimated flux feedback in low‐speed range

Fukumoto

Kato

Kurita

et al. 2009

Electrical Engineering Japan

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“…Various solutions to the above problems have been proposed in order to achieve stable operation including the low-speed regenerating region [6][7][8][9][10]. However, in studies intended for stabilization of speed identification, the following problems remain (regardless of whether the stator resistance is identified or not).…”

Section: Introductionmentioning

confidence: 99%

“…• There are parameters requiring trial-and-error determination [6] • The required poles are often inconsistent with the observer's stability [7] • A steady state of induction motor is assumed [7,8] In addition, the following problems are to be solved when identification of the stator resistance is included in sensorless vector control for the purpose of better control performance at low speed.…”

Section: Introductionmentioning

confidence: 99%

Sensorless vector control of induction motor stabilized in the whole region with speed and stator resistance identification based on augmented error

Hamajima

Hasegawa

Doki

et al. 2006

Electrical Engineering Japan

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SUMMARYThis paper proposes new identification laws of an adaptive flux observer for speed sensorless vector controls. In speed sensorless vector controls of an induction motor with the adaptive observer, the speed identification system is known to be unstable in a part of the regenerating region. In addition, it is pointed out that the stator resistance variation interferes with the speed identification. Thus, it is necessary to find an adaptive scheme which can stabilize the identification system.In this paper, first, the stability on the parameter identification is discussed from the viewpoint of Popov's hyperstability. Second, identification laws for the speed and the stator resistance are proposed based on the new identification system which is derived by using the augmented error. Finally, the effectiveness of the proposed method is shown by experiments.

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Performance Improvement of Induction Motor Speed Sensor-Less Vector Control System Using an Adaptive Observer with an Estimated Flux Feedback in Low Speed Range

et al. 2008

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Because of various errors caused by the dead time of an inverter, temperature variation of resistances, and so on, speed estimation error is inevitable in speed sensor‐less vector control of an induction motor. In particular, the speed control loop becomes unstable at near‐zero frequencies. In order to solve these problems, this paper proposes a novel design of an adaptive observer for speed estimation. By adding a feedback loop of the error between the estimated flux and the flux command, the sensitivity of speed estimation and primary resistance identification is improved. The proposed system is analyzed and appropriate feedback gains are derived. Experimental results showed good performance in the low‐speed range. © 2009 Wiley Periodicals, Inc. Electr Eng Jpn, 169(3): 33–46, 2009; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/eej.20909

show abstract

Design of Adaptive Observer for Sensorless Vector Control of IM under Regenerating Condition

Cited by 7 publications

References 1 publication

Performance improvement of induction motor speed sensor‐less vector control system using an adaptive observer with an estimated flux feedback in low‐speed range

Performance improvement of induction motor speed sensor‐less vector control system using an adaptive observer with an estimated flux feedback in low‐speed range

Sensorless vector control of induction motor stabilized in the whole region with speed and stator resistance identification based on augmented error

Performance Improvement of Induction Motor Speed Sensor-Less Vector Control System Using an Adaptive Observer with an Estimated Flux Feedback in Low Speed Range

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