A Novel Starting Method for Sensorless Brushless DC Motor with Low Cost

Qiang Wang; You Ren Wang; De Ming Kong; Yong Wu

doi:10.4028/www.scientific.net/AMM.336-338.750

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 336-338A Novel Starting Method for Sensorless Brushless...

A Novel Starting Method for Sensorless Brushless DC Motor with Low Cost

Abstract:

This paper presents a novel method to improve the starting performance for sensorless brushless DC motor (BLDCM) with low cost, based on the principle of back electromotive force (BEMF). The commutation points are extracted from three phase terminal voltages achieved by AD converters integrated in the microprocessor. The phase delay caused by the detection circuit is compensated. The start process consists of alignment, accelerating, and switching. In the accelerating process, the commutation instants are determined by the zero-crossing points and phase delay table. The motor can be started reliably because of the closed-loop startup strategy. Experimental results have verified the effectiveness of the proposed method.

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Periodical:

Applied Mechanics and Materials (Volumes 336-338)

Pages:

750-754

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.336-338.750

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Online since:

July 2013

Authors:

Qiang Wang, You Ren Wang, De Ming Kong, Yong Wu

Keywords:

Back Electromotive Force, Brushless Dc Motor (BLDCM), Position Sensorless, Starting

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References

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