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http://dx.doi.org/10.6113/JPE.2015.15.3.721

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

Lee, Kyoung-Gu (Department of Electrical and Computer Engineering, Ajou University)
Lee, June-Seok (Department of Electrical and Computer Engineering, Ajou University)
Lee, Kyo-Beum (Department of Electrical and Computer Engineering, Ajou University)
Publication Information
Journal of Power Electronics / v.15, no.3, 2015 , pp. 721-729 More about this Journal
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.
Keywords
Flux observer; Full-order flux observer; Low-speed sensorless; Sensorless; Surface-permanent magnet synchronous motor;
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Times Cited By KSCI : 4  (Citation Analysis)
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