Impact of PWM Schemes on the Common-Mode Voltage of Interleaved Three-Phase Two-Level Voltage Source Converters
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Bibliographic record
Abstract
Interleaved three-phase voltage source converters (VSCs) are widely applied in industry. The circulating current issue has been the focus so far in literature. However, the common-mode voltage (CMV) generated from interleaved VSCs, which is also a key factor that influences the system's performance, has not yet been studied in detail. In this paper, the impact of pulsewidth modulation (PWM) strategies on the CMV of interleaved two-level VSCs is analyzed. The analysis is conducted based on the double Fourier integral theory and in a generalized way considering an arbitrary number of interleaved converters. Five PWM schemes are considered, including the interleaved sinusoidal PWM (ISPWM), the interleaved space vector modulation (ISVM), the interleaved discontinuous PWM (IDPWM), and the recently proposed interleaved carrier phase-shift PWM (ICPS PWM), and interleaved carrier phase-shift SVM (ICPS SVM). Both magnitude and harmonic content of CMV are examined for each method. The analysis reveals that with ISPWM, ISVM, ICPS PWM, and ICPS SVM, the CMV can be reduced. In contrast, interleaving has little impact on the CMV with IDPWM, which is always at VDC/2 due to high low-order harmonics, making it less attractive for drive applications using coupled architecture. For modular architecture, ICPS PWM and ICPS SVM are more desirable considering their low-ZSCC peak value. The study is verified through experimental results.
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Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it