Wide-Range Sensorless Control for SPMSM Using an Improved Full-Order Flux Observer


Vol. 15, No. 3, pp. 721-729, May  2015
10.6113/JPE.2015.15.3.721


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 Abstract

A sensorless control method was recently investigated in the robot and automation industry. This method can solve problems related to the rise of manufacturing costs and system volume. In a vector control method, the rotor position estimated in the sensorless control method is generally used. This study is based on a conventional full-order flux observer. The proposed full-order flux observer estimates both currents and fluxes. Estimated d- and q-axis currents and fluxes are used to estimate the rotor position. In selecting the gains, the proposed full-order flux observer substitutes gain k for the speed information in the denominator of the gain for fast convergence. Therefore, accurate speed control in a low-speed region can be obtained because gains do not influence the estimation of the rotor position. The stability of the proposed full-order flux observer is confirmed through a root-locus method, and the validity of the proposed observer is experimentally verified using a surface permanent-magnet synchronous motor.


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Cite this article

[IEEE Style]

K. Lee, J. Lee, K. Lee, "Wide-Range Sensorless Control for SPMSM Using an Improved Full-Order Flux Observer," Journal of Power Electronics, vol. 15, no. 3, pp. 721-729, 2015. DOI: 10.6113/JPE.2015.15.3.721.

[ACM Style]

Kyoung-Gu Lee, June-Seok Lee, and Kyo-Beum Lee. 2015. Wide-Range Sensorless Control for SPMSM Using an Improved Full-Order Flux Observer. Journal of Power Electronics, 15, 3, (2015), 721-729. DOI: 10.6113/JPE.2015.15.3.721.