Optimizing Efficiency Driver Comprising Phase-Locked Loop for the Single-Phase Brushless DC Fan Motor

Because the single-phase brushless fan motor presents an inductive load, the winding current will lag the back-electromotive force (EMF) an unequal phase based on the different motor speed. In order to improve the efficiency and torque performance, adjusting the commutation angle to keep the optimiz...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2012-05, Vol.48 (5), p.1937-1942
Main Authors: Chen, Yie-Tone, Chiu, Chun-Lung, Tang, Zong-Hong, Liang, You-Len, Liang, Ruey-Hsun
Format: Article
Language:English
Subjects:
Brushless DC motors
Commutation
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Finite-element method (FEM)
Induction motors
Materials science
optimum commutation angle
Other topics in materials science
Permanent magnet motors
Phase locked loops
Physics
PLL
single-phase brushless DC motor
Windings
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Description
Summary:Because the single-phase brushless fan motor presents an inductive load, the winding current will lag the back-electromotive force (EMF) an unequal phase based on the different motor speed. In order to improve the efficiency and torque performance, adjusting the commutation angle to keep the optimizing commutation at different speed is necessary. In this paper, the new structure with low cost to achieve the optimizing commutation is accomplished by the concept of phase-locked loop (PLL) to synchronize the winding current and back EMF. The PLL IC CD4046 is adopted to develop a feedback circuit and performs the function of phase advance. The purpose is to force the winding current to be synchronized with the back-EMF. Finally, the related experimental results are used to confirm the feasibility and effectiveness of the proposed driving method.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2177853