DocumentCode :
1235855
Title :
A novel sensorless control method for brushless DC motor
Author :
Wang, H.-B. ; Liu, H.-P.
Author_Institution :
State Key Lab. of Power Transm. Equip. & Syst. Security & New Technol., Chongqing Univ., Chongqing
Volume :
3
Issue :
3
fYear :
2009
fDate :
5/1/2009 12:00:00 AM
Firstpage :
240
Lastpage :
246
Abstract :
The authors present the theory and implementation of a novel sensorless control method for the interior permanent magnet (IPM) brushless DC motor (BLDCM). The proposed new sensorless technique can accurately detect the zero-cross point (ZCP) of back electromotive force (BEMF), which is based on a comparison of the terminal voltage of the un conducting phase during the first and second part of a pulse width modulation (PWM) cycle. Compared with the conventional BEMF sensorless approach, the proposed new sensorless method solves the problem of the sensorless BLDCM drives at very low speeds. Experimental results confirm the validity of the new method.
Keywords :
brushless DC motors; machine control; permanent magnet motors; permanent magnets; pulse width modulation; back electromotive force; brushless DC motor; interior permanent magnet; pulse width modulation; sensorless control method; zero-cross point;
fLanguage :
English
Journal_Title :
Electric Power Applications, IET
Publisher :
iet
ISSN :
1751-8660
Type :
jour
DOI :
10.1049/iet-epa.2008.0168
Filename :
4814329
Link To Document :
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