Eliminating common mode winding voltages for a 3-limb coupled inductor used in 3/5-level PWM voltage source inverters
Bibliographic record
Abstract
Three new PWM schemes are described for 3-phase dual inverter systems that allow a 3-limb coupled inductor to be used and produce 3/5 level pwm output voltages. A standard space vector pwm scheme is used to show that standard interleaved pwm techniques are not suitable to control the dual inverters: switching states exist that produce common-mode winding voltages. Special PWM techniques have to be used to align the inverter switching edges between phases. A useful rule to follow assumes that the sum of the winding voltages must sum to zero for all pwm switching states. Experimental and simulation results are used to compare the performance of the 3 schemes over the entire output voltage range and based upon the following performance criteria: average volt-seconds across the coupled inductor windings; average volt-seconds of the harmonics in the output line voltage PWM waveforms; inverter output current THD; inductor losses; common-mode inverter output voltage waveforms; inverter efficiencies.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".