Prediction and Analysis of PWM-Induced Current Ripple of PMSM at Low Switching-to-Fundamental Frequency Ratios

This article addresses the challenge of current ripple in permanent magnet synchronous machines (PMSMs), predominantly caused by the pulse width modulation (PWM) effect of voltage source inverter. This phenomenon is especially prominent at low switching-to-fundamental frequency ratios (SFFRs), leadi...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2024-08, p.1-10
Main Authors: Zhou, Jiayue, Song, Zhe, Xiao, Xi
Format: Article
Language:English
Subjects:
Accuracy
Couplings
Current ripple
discrete model
low switching-to-fundamental frequency ratio (SFFR)
Mathematical models
permanent magnet synchronous machine (PMSM)
Pulse width modulation
Switches
Vectors
Voltage
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Summary:This article addresses the challenge of current ripple in permanent magnet synchronous machines (PMSMs), predominantly caused by the pulse width modulation (PWM) effect of voltage source inverter. This phenomenon is especially prominent at low switching-to-fundamental frequency ratios (SFFRs), leading to significant noises and decreased efficiency. This article proposes a flux-linkage-based discrete method to accurately and fastly predict PWM-induced current ripple in PMSMs. Ripple patterns and various influencing factors are studied indepth based on the proposed method. Experimental studies to validate the proposed prediction method are presented, confirming its effectiveness, especially in scenarios where traditional methods fall short due to low SFFRs.
ISSN:0278-0046
DOI:10.1109/TIE.2024.3436682