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Extended state sliding mode observer of PMSM and estimation of rotor position plus speed(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2008年05
Page:
524-528
Research Field:
Publishing date:

Info

Title:
Extended state sliding mode observer of PMSM and estimation of rotor position plus speed
Author(s):
SU Jian-yongYANG Gui-jieLI Tie-cai
School of Electrical Engineering and Automation, Harbin Institute of Technology
Keywords:
synchronous motors permanent magnet synchronous motors sliding mode observer sensorless vector control
PACS:
TM301
DOI:
-
Abstract:
In order to solve the chattering phenomenon in PMSM back EMF sliding mode observer(SMO), adaptive hybrid SMO was presented based on the PMSM extended state equation, of which the state variables were current and flux. The error between real and observed current was selected as sliding hyperplane. When the sliding mode occurred, the error was zero, and the equivalent control signals contained the information about the flux observation error. The error converged to zero when the equivalent signals were inputted to flux equation. The chattering phenomenon was suppressed well in the flux observation, from which the rotor angle can be calculated directly without filter. The influence of speed estimation error to flux observation was analyzed, and feedback matrix was calculated based on the analysis. The speed adaptive scheme was established, which was proved by Lyapunov theory. Simulation and experimental results show that the proposed method can precisely calculate the position and speed of the rotor, and the system has good dynamic and static performances.

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Memo

Memo:
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Last Update: 2008-12-11