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http://dx.doi.org/10.5916/jkosme.2016.40.3.217

Sensorless speed control of permanent magnet synchronous motor using square-root extended kalman filter  

Moon, Cheol (Department of Electrical and Computer Engineering Pusan National University)
Kwon, Young-Ahn (Department of Electrical and Computer Engineering Pusan National University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.40, no.3, 2016 , pp. 217-222 More about this Journal
Abstract
This study investigates the design, analysis, and implementation of the square-root extended Kalman filter by using an algorithm derived by combining the Potter or Carlson algorithm with the modified Gram-Schmidt algorithm, for sensorless speed control of a permanent-magnet synchronous motor. The sensitivity of the Kalman filter to round-off errors is a well-known problem. A possible way to address this limitation is by combining the square-root concept and Kalman filter that can improve the numerical performance and solve instability-related problems such as divergence. This paper presents the design and analysis of the implementation of such a square-root extended Kalman filter. To demonstrate the performance of the proposed filter, experimental results under several operating conditions, such as high and low speeds, reversal rotation, detuned parameters and load test, have been analyzed. Further, code sizes and operation times have been compared. Experimental results establish the performance of the proposed square-root extended Kalman filter-based estimation technique for sensorless speed control of a permanent-magnet synchronous motor.
Keywords
Square-root extended Kalman filter; Permanent-magnet synchronous motor; Sensorless speed control;
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