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Optimal Driving Efficiency Design for the Single-Phase Brushless DC Fan Motor

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4 Author(s)
Chun-Lung Chiu ; $^{1}$ Graduate School of Engineering Science & Technology,, National Yunlin University of Science and Technology,, Yunlin , Taiwan ; Yie-Tone Chen ; You-Len Liang ; Ruey-Hsun Liang

One of the methods to improve efficiency and torque performance of the single-phase brushless DC (BLDC) motor is to find out the optimum commutation angle at each different speed. We used the finite-element method (FEM) to simulate the back-EMF voltage and the coil current for the single-phase BLDC motor, and then adjust the conduction time of switches by detecting the waveform of coil current. The motor can improve its efficiency, noise, and vibration when it obtains the optimal shift angle of each speed. We used PSPICE to verify the exactness of FEM simulation results of the single-phase BLDC motor. We adopted Microchip's dsPIC30F4011 digital signal processor (DSP) to process the Hall signal and the driving signals of switches of the driving system prototype of the single-phase BLDC fan motor. Finally, we used the related experimental results to confirm the feasibility and effectiveness of the proposed driver.

Published in:

IEEE Transactions on Magnetics  (Volume:46 ,  Issue: 4 )