NDLI: Novel speed and rotor position estimation strategy using a dual observer for low resolution position sensors

Content Provider	IEEE Xplore Digital Library
Author	Anno Yoo Seung-Ki Sul Dong Cheol Lee Cha Seung
Copyright Year	2008
Description	Author affiliation: Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., Seoul (Anno Yoo; Seung-Ki Sul)
Abstract	Recently, high performance AC motor drive technologies including a field oriented control (FOC) are widely used in home appliance products such as a direct- drive drum washing machine. In home appliance, speed or position sensors with high resolution are prohibitive due to the cost problems. Usually, a low resolution sensor is installed to calculate the speed and rotor position. In the FOC, however, accurate rotor angle information is essential for high performance torque control. On top of the low resolution of the sensor, the accuracy of the sensor is poor due to mechanical errors of sensor itself and installation. The inaccurate and delayed position information degrades the performance of current regulation and also increases torque ripples, which is the source of vibration and acoustic noise. In order to overcome the hardware problems, this paper proposes a software technique using a novel dual observer and position sensor offset compensation strategy. The dual observer can estimate the rotor speed and position without any time delay and bumps with the compensation algorithm for the position sensor offset by adjusting the misaligned synchronous reference frame d and q-axis. Experimental results verify the effectiveness of the proposed method.
Starting Page	647
Ending Page	653
File Size	648710
Page Count	7
File Format	PDF
ISBN	9781424416677
ISSN	02759306
DOI	10.1109/PESC.2008.4592003
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-15
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Sensors Rotors Torque Mechanical sensors Observers Estimation Sensor systems
Content Type	Text
Resource Type	Article

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