Analysis of Estimation Errors in Rotor Position for a Sensorless Control System Using a PMSM

Yongsoon Park; Seung-Ki Sul; Jun-Keun Ji; Young-Jae Park

Analysis of Estimation Errors in Rotor Position for a Sensorless Control System Using a PMSM

Vol. 12, No. 5, pp. 748-757, Sep. 2012

10.6113/JPE.2012.12.5.748

Angle error

Permanent magnet synchronous motor

Sensorless control

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Abstract

In a sensorless control system with a Permanent Magnet Synchronous Motor (PMSM), the angular position of the rotor flux can be estimated by a voltage equation. However, the estimated angle may be inaccurate due to various causes. In this paper, it was comprehensively analyzed how various causes affect the angle error. As a result of the analysis, an error equation intuitively describing these relationships was derived. The parameter errors of a PMSM and the non-ideal properties of the driving system were identified as error-causing factors. To demonstrate the validity of the error equation, PMSMs were tested at various operating points. The variations in angle errors could be well explained with the error equation.

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Cite this article

[IEEE Style]

Y. Park, S. Sul, J. Ji, Y. Park, "Analysis of Estimation Errors in Rotor Position for a Sensorless Control System Using a PMSM," Journal of Power Electronics, vol. 12, no. 5, pp. 748-757, 2012. DOI: 10.6113/JPE.2012.12.5.748.

[ACM Style]

Yongsoon Park, Seung-Ki Sul, Jun-Keun Ji, and Young-Jae Park. 2012. Analysis of Estimation Errors in Rotor Position for a Sensorless Control System Using a PMSM. Journal of Power Electronics, 12, 5, (2012), 748-757. DOI: 10.6113/JPE.2012.12.5.748.