著者

陳 志謙 冨田 睦雄 千住 智信 道木 慎二 大熊 繁

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.118, no.7-8, pp.828-835, 1998-07-01 (Released:2008-12-19)

参考文献数

7

被引用文献数

8 7

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The equation of brushless dc motors is nonlinear, to which linear control theories are difficult to apply. In this paper, firstly, a disturbance observer to estimate rotor positions is proposed. By assuming the non-linear term of the e. m. f. as a kind of disturbance, the model of the brushless dc motors becomes a linear one so that the disturbance observer can be applied. Secondly, a velocity estimator using the e. m. f. estimated by the disturbance observer is proposed. The observer and estimator are 2nd-order systems. Thus they are simple and easy for tuning. Their pole assignments and influences of parameter deviations are also discussed. The experimental results show that the proposed method is valid.

著者

市川 真士 陳 志謙 冨田 睦雄 道木 慎二 大熊 繁

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌D(産業応用部門誌) (ISSN:09136339)

巻号頁・発行日

vol.122, no.12, pp.1088-1096, 2002-12-01 (Released:2008-12-19)

参考文献数

17

被引用文献数

42 63

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Salient-pole permanent magnet synchronous motors have been widely used in industrial applications for their high efficiency. To control these motors, knowledge of rotor position and velocity are necessary and expensive sensors have been used to detect these signals. Although many sensorless control algorithms have been developed for cylindrical permanent magnet motors, they cannot be applied for salient-pole machines without any approximation because of the complicated mathematical model, and this may lead to unstable problems. To solve this problem, new extended electromotive force models for synchronous motors have been proposed in this paper. The proposed models have a simple structure integrating position information both in the magnet and in the inductance into one extended electromotive force term. Using these models, no approximation is necessary. Experimental results show that the proposed model and method are valid.

著者

高島 大 冨田 睦雄 陳 志謙 佐藤 光彦 道木 慎二 大熊 繁

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society (ISSN:09136339)

巻号頁・発行日

vol.123, no.6, pp.762-763, 2003-06-01

被引用文献数

1

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This paper proposes to paste non-magnetic materials on the rotor surface of a cylindrical brushless DC motor and to use the model including the extended e.m.f. for sensorless control. In the proposed method, the inductance changes depending on the rotor position because of eddy currents, which flow on the non-magnetic material at high frequency. The rotor position can be estimated at standstill and at low speeds. The simulation results show that the proposed method is very useful.