NDLI: Using oversampling techniques to extract ac machine saliency information

Content Provider	IEEE Xplore Digital Library
Author	Nussbaumer, P. Wolbank, T.M.
Copyright Year	2010
Description	Author affiliation: Department of Electrical Drives and Machines, Vienna University of Technology (Nussbaumer, P.; Wolbank, T.M.)
Abstract	Controlling an ac machine without speed or position sensor at zero frequency requires the extraction of its inherent or engineered saliencies. This extraction is currently linked to injected high frequency or transient test signals that are superposed to the fundamental wave. These test signals also affect noise emission, maximum inverter output voltage, and switching frequency. Different methods for an integration of the test signal injection into the fundamental wave excitation have been made, however a full integration in all operating states is still not possible. In this paper a method to extract the necessary saliency information without applying test signals is proposed and analyzed. It is based on oversampling techniques and uses the information that appears in current sensor signals during the switching transients. Different realizations are presented and their performance compared with respect to changes in the operating parameters. It is shown by measurement results that applying the proposed techniques it is possible to obtain the saliency information necessary for speed sensorless control.
Starting Page	1035
Ending Page	1040
File Size	751840
Page Count	6
File Format	PDF
ISBN	9781424452255
ISSN	1553572X
DOI	10.1109/IECON.2010.5675510
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Modulation Switches Transient analysis Current measurement Signal to noise ratio Inverters Accuracy
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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