| Summary: | 碩士 === 高苑科技大學 === 電機工程研究所 === 96 === The electromagnetic torque is an important indicator of the performance of electrical machinery, and the torque ripple generated in commutation period is the main drawback of BLDC motor, which deteriorates the precision of BLDC motor. Therefore the torque ripple reduction is the key technology in the control of BLDC motor. An analytical study was developed concerning the torque ripple under 4 kinds of PWM schemes due to phase commutation.
Experiments were conducted to validate the analytical work and the PWM-ON type was confirmed to be the best scheme in four types PWM scheme, including PWM-ON, H_PWM-L_ON, ON-PWM, and H_ON-L_PWM.
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