Overcoming current quantization effects for precise current control by combining dithering techniques and Kalman filter

Hongzhong Zhu, Hiroshi Fujimoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Accurate current signals are required for precise current control of AC motor drives. However, current measurement error including the metering error and the quantization error is unavoidable due to the inaccuracy of current sensors and the quantizing feature of analog-to-digital converters. In this paper, the combination of dithering techniques and Kalman filter is presented to suppress the current quantization effects caused by A/D converters. Firstly, the dithering system is designed to whiten the total current measurement error. Then, Kalman filter is exploited to estimate the real current signals from the whitened noise. The effectiveness of the proposed approach is verified via simulations and experiments using a high-precision stage.

Original languageEnglish
Title of host publicationProceedings, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Pages3826-3831
Number of pages6
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012 - Montreal, QC, Canada
Duration: Oct 25 2012Oct 28 2012

Publication series

NameIECON Proceedings (Industrial Electronics Conference)

Conference

Conference38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012
CountryCanada
CityMontreal, QC
Period10/25/1210/28/12

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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