A 12-Step Sensorless Drive for Brushless DC Motors Based on Back-EMF Differences

Wang Samuel; Lee An-Chen

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A 12-Step Sensorless Drive for Brushless DC Motors Based on Back-EMF Differences

机译：A 12-Step Sensorless Drive for Brushless DC Motors Based on Back-EMF Differences

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摘要

This paper presents a new 12-step sensorless drive for brushless dc motor based on back-electromotive force (back-EMF) differences, which are estimated from the disturbance observer (DOB) structure. Availability of rotor position information with a resolution of 30 degrees and commutation without phase shift are the advantages of using the back-EMF differences. Unlike the conventional methods that obtain part of the back-EMF signal from the manipulation of three phase voltages, the proposed DOB structure can access the entire back-EMF profile. By designing a proper low-pass filter in the DOB structure, the back-EMF difference can be well detected with lower sensor noise. Compensation of delay commutation introduced by the filter is also discussed. Experiment results showed that the proposed sensorless drive is capable of running the motor in lower speed, and performs better under different speed and load torque as compared with the conventional method.

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来源
《IEEE Transactions on Energy Conversion》 |2015年第2期|646-654|共9页
作者
Wang Samuel; Lee An-Chen;
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作者单位

Natl Chiao Tung Univ, Dept Mech Engn, Hsinchu 300, Taiwan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类电工技术;
关键词
Back electromotive force (back-EMF) detection; back electromotive force differences; brushless dc motor (BLDC); delay compensation; disturbance observer (DOB); sensorless control; torque ripple;

A 12-Step Sensorless Drive for Brushless DC Motors Based on Back-EMF Differences

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