Three-Level Hysteresis Power Control for Pulse-Density-Modulated Series Resonant Converters
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Bibliographic record
Abstract
Modern power conversion electronic devices must not pollute the power distribution system and keep a unit power factor. Furthermore, their design must be size and cost effective. It is also expected that all new designs should have an entirely digital control by 2008. We present a series resonant power converter that is driven by a pulse density modulation (PDM) strategy combined with a three level hysteresis controller to adjust output power. This approach is suitable for a fully digital control design. A single digital signal controller is used to monitor and control the whole system. By the means of simulations and experimental results, it has been shown that a traditional sixteen-level PDM approach helps to maintain a near unity power factor and a low total harmonic distortion. However, such converter can only deliver sixteen output power levels. Design parameters are such that a 25 kHz signal is delivered to the load. Research presented here shows that using the proposed hysteresis control the PDM series resonant converter is able to deliver a wide output power range with 1 W resolution (range from 5 to 360 W). The mean output power error is less than 0.3 %. This strategy can be combined to other PDM approaches to obtain a better power factor and an improved THD within desired power range
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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 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it