Disturbance observer for dead-time compensation with variable gain and its stability analysis based on popov criterion

Shuhei Shimmyo, Kouhei Ohnishi

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

7 Citations (Scopus)

Abstract

Dead-times are widely utilized for the inverters to prevent short-circuits. In motor drive applications, 6th-order torque pulsations caused by dead-times depend on rotational speeds of motors. A Disturbance OBserver (DOB) approach is effective for the dead-time compensation in low load operations. The performance of the DOB depends on the observer gains. Hence, if we use the conventional constant observer gains, the 6th-order torque pulsation cannot be suppressed effectively. In this paper, the DOB with the variable gain is proposed. Besides, its stability is analyzed based on the Popov criterion, because the proposed system contains the nonlinear system. In this paper, the ability to reduce the voltage errors by using the multi-level inverters is also introduced. In our analysis, the value of the voltage errors affects the stability. The validity of the proposed method is confirmed by our experimental results.

Original languageEnglish
Title of host publicationIECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2550-2555
Number of pages6
ISBN (Electronic)9781479917624
DOIs
Publication statusPublished - 2016 Jan 25
Event41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015 - Yokohama, Japan
Duration: 2015 Nov 92015 Nov 12

Other

Other41st Annual Conference of the IEEE Industrial Electronics Society, IECON 2015
CountryJapan
CityYokohama
Period15/11/915/11/12

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering

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    Shimmyo, S., & Ohnishi, K. (2016). Disturbance observer for dead-time compensation with variable gain and its stability analysis based on popov criterion. In IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society (pp. 2550-2555). [7392486] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IECON.2015.7392486