Abstract
For miniature spindle motors design and their applications, the output torque is one of the most important characteristics and it is necessary to improve the output torque of miniature spindle motors in keeping with consumer preferences. Accordingly, this paper is aimed to overcome this problem and propose a novel electromagnetic structure design to improve the output torque of the spindle motor for miniature cooling fans and modern consumer electronic products. In contrast to one phase DC brushless motor with only one axial air gap or radial air gap inside its electromagnetic structure, the proposed one phase DC brushless motor comprises simultaneously one axial air gap and radial air gap inside its electromagnetic structure. This paper utilizes commercial software MagNet to numerically verify the proposed one phase DC brushless motor. The simulation results show that compared to the conventional one phase DC brushless motors with only one axial air gap or radial air gap, the proposed one phase DC brushless motor can improve the output torque obviously. In other words, the novel electromagnetic structure of the proposed one phase DC brushless motor can enhance the operation efficiency. As a result, the results presented in this study show that the proposed one phase DC brushless motor provides potential solution for both existing and emerging miniature spindle motor applications.
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Acknowledgments
The authors gratefully acknowledge the financial support provided to this study by the National Science Council of Taiwan under Grant No. NSC 102-2221-E-194-023 and the Ministry of Science and Technology of Taiwan under Grant No. MOST 103-2221-E-194-006-MY3.
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Liu, CS., Chang, YH. Development of novel spindle motor with dual air gaps to improve output torque. Microsyst Technol 23, 371–379 (2017). https://doi.org/10.1007/s00542-015-2685-2
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DOI: https://doi.org/10.1007/s00542-015-2685-2