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

Samuel Wang, An-Chen Lee

研究成果: Article同行評審

30 引文 斯高帕斯(Scopus)

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° 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.

原文English
文章編號6975137
頁(從 - 到)646-654
頁數9
期刊IEEE Transactions on Energy Conversion
30
發行號2
DOIs
出版狀態Published - 1 6月 2015

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