One-Digital-Sampling Commutation Method for Low Inductance Brushless DC Motor

Lee, Juwon; Lim, Gyu Cheol; Ha, Jung‐Ik

doi:10.1109/apec43599.2022.9773603

Cited by 2 publications

(1 citation statement)

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“…Therefore, the commutation period and duration of CED become non-periodical. The pre-presented research [26] synchronized the commutation period to a digital sampling period to eliminate CED, but the commutation period was not achieved to be a minimum since the minimum value becomes shorter than a sampling period when the motor is driven with a higher switching frequency. In the proposed NSP commutation method, the commutation period is synchronized to the multiple of the switching period and 𝑁 𝑐𝑚 , which is called 'commutation constant'.…”

Section: A N-switching Period Commutation Methodsmentioning

confidence: 99%

Pulse Width Modulation Methods for Minimizing Commutation Torque Ripples in Low Inductance Brushless DC Motor Drives

Lee

Lim

Park

2023

IEEE Trans. Ind. Electron.

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This paper proposes pulse width modulation (PWM) methods for low inductance brushless DC (BLDC)motor drives that minimize the commutation torque ripples. An uneven current of non-commutation phase generates the commutation torque ripples. In the low inductance BLDC motor drives, two types of time delays in PWM also induce critical torque ripples. In this paper, the analyses of the time delays in PWM and their effects are introduced. Then, two PWM methods are proposed to eliminate the time delays in the commutation region and the conduction region, respectively. The commutation period is controlled to be synchronized to the switching period. In addition, the proposed methods synchronize the switching period to the commutation interrupt. As a result, the proposed methods effectively maintain the minimum commutation period as well as minimize the commutation torque ripples in the low inductance BLDC motor drives. The validity of the proposed methods is demonstrated by the simulation and experimental results in various driving conditions. The results show that the commutation period is remarkably shortened and the commutation torque ripples are reduced by 27.6% in comparison to the conventional method.

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Section: A N-switching Period Commutation Methodsmentioning

confidence: 99%