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논문 기본 정보

자료유형
학술대회자료
저자정보
Yangyang Chen (Harbin Institute of Technology) Ming Yang (Harbin Institute of Technology) Dianguo Xu (Harbin Institute of Technology) Frede Blaabjerg (Aalborg University)
저널정보
전력전자학회 ICPE(ISPE)논문집 ICPE 2019-ECCE Asia
발행연도
2019.5
수록면
78 - 83 (6page)

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초록· 키워드

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The performance of the closed-loop control system is determined by the accuracy of the feedback signal to some extent. In most motor drive systems, the position and speed signals come from the optical encoder. Thus, to reduce the quantization error from encoder and achieve better speed measurement results are the focuses of scholars and engineers. Although many improved speed measurement methods have been proposed, there are still few literatures discussed about the frequency characteristic of the encoder quantization noise. Even in some algorithms like Kalman filter based speed measurement methods usually regard the quantization noise as white noise. In this paper, a noise frequency characteristic model of encoder-based speed measurement in motor drive is built up. According to this model, the variation rule of the noise frequency is found. Besides, a variable-period noise shaping method is proposed to reduce the impact of quantization noise. Both the notch filter and a finite impulse response (FIR) filter are used to cope with the quantization noise. The frequency model and noise shaping method are verified by experiment results.

목차

Abstract
I. INTRODUCTION
II. FREQUENCY CHARACTERISTIC MODEL ABOUTQUANTIZATION ERROR FROM ENCODER
III. PROPOSED VARIABLE PERIOD NOISE SHAPING METHOD
IV. EXPERIMENTAL RESULTS
V. CONCLUSION
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