5-Level PWM Scheme for a Dual Inverter Drive Using an Open Winding Machine
Bibliographic record
Abstract
This paper presents a carrier based PWM scheme for a dual inverter drive using an open ended winding induction machine, where the modulating signals are derived using the differential and average components of the two inverter references of each phase. The scheme is able to produce a high quality 5-level line voltage for any arbitrary fundamental phase difference between the two inverters of the drive. Hence, the scheme can be used with both a dual inverter drive with a floating capacitor bridge which requires a phase difference of 90°, or a drive with two isolated DC supplies which usually requires a phase difference of 180°. Since the scheme is carrier based, sector identification and lookup tables are not necessary, and can be easily implemented on a DSP. The proposed scheme is compared with conventional sinusoidal PWM in simulation, and is shown to reduce the current THD and harmonic volt seconds, resulting in a reduction of high frequency conduction and iron losses in the machine. The effects of deadtime on THD are also simulated. These results are validated experimentally.
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How this classification was reachedexpand
Full frame distilled prediction
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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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 teacher head, 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".