NDLI: Improvement of torque-speed characteristics of brushless motor by automatic lead angle adjustment

Content Provider	IEEE Xplore Digital Library
Author	Tozune, A. Takeuchi, T.
Copyright Year	2004
Description	Author affiliation: Dept. of Syst. Eng., Ibaraki Univ., Japan (Tozune, A.; Takeuchi, T.)
Abstract	The torque-speed characteristics of a brushless motor vary depending on the lead angle (commutation advance angle). Moreover, the lead angle maximizing the torque varies depending on the speed, and this makes it necessary to change the lead angle in accordance with the speed, to obtain favorable torque-speed characteristics over the entire speed range. This corresponds to changing the installed position of the Hall elements with the speed, but it is practically impossible to do so. We proposed a method of substantially changing the lead angle in accordance with the speed, by changing the phase of the output voltage from the Hall element together with the speed, instead of moving the Hall element. We also made it clear that a problem in the realization of this method is the distortion of the output voltage from the Hall element, and examined countermeasures against it. Moreover, observation was made of the torque-speed characteristics obtained by this method.
Sponsorship	China Electrotechnical Soc. (CES) National Natural Sci. Found. of China (NSFC)
Starting Page	583
Ending Page	587
File Size	236029
Page Count	5
File Format	PDF
ISBN	7560518699
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-08-14
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Xi'an Jiaotong Univ. Press
Subject Keyword	Brushless motors Torque Lead Rotors Voltage Sensor phenomena and characterization Blades Stators Coils Timing
Content Type	Text
Resource Type	Article

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