Higher-order sliding mode observer for speed and position estimation in pmsm

Suneel K. Kommuri, Kalyana C. Veluvolu*, M. Defoort, Yeng C. Soh

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


This paper presents a speed and position estimation method for the permanent magnet synchronous motor (PMSM) based on higher-order sliding mode (HOSM) observer. The back electromotive forces (EMFs) in the PMSM are treated as unknown inputs and are estimated with the HOSM observer without the need of low-pass filter and phase compensation modules. With the estimation of back EMFs, an accurate estimation of speed and rotor position can be obtained. Further, the proposed method completely eliminates chattering. Experimental results with a 26 W three-phase PMSM demonstrate the effectiveness of the proposed method.

Original languageEnglish
Article number589109
JournalMathematical Problems in Engineering
Publication statusPublished - 2014
Externally publishedYes

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