A Cascaded Multilevel Topology with Optimized Modulation for Achieving Zero-Voltage Switching in High-Blocking-Voltage Devices
Bibliographic record
Abstract
This paper proposes a novel multilevel inverter topology that integrates a cascaded half-bridge modules with multiple full-bridge modules. A key innovation of the proposed structure is its ability to ensure Zero Voltage Switching (ZVS) for high-voltage switching devices within the full-bridge modules, effectively reducing switching losses and enabling the use of seriesconnected devices to meet high blocking voltage requirements. To fully leverage the modular architecture of the inverter, a phaseshifted carrier-based modulation strategy is adopted. This method utilizes a single, modified reference signal for all half-bridge cells, which is compared against phase-shifted carrier signals to generate a high-frequency stepped waveform. The waveform is then unfolded by the full-bridge modules to achieve the desired multilevel output with ZVS operation. The proposed topology is scalable and flexible, allowing easy adjustment of the number of half-bridge and full-bridge units to meet diverse application needs. The validity and effectiveness of the design and modulation scheme are demonstrated through detailed simulation results of a 25-level single-phase inverter, confirming its suitability for highefficiency, high-voltage applications.
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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 | 0.000 |
| 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".