Application of a bidirectional DC-DC in an electric powertrain for medium duty delivery trucks
Bibliographic record
Abstract
The efficiency of electric powertrains is of great importance for the electrification of transport. In this paper, the efficiencies of two different powertrains are compared. The first design uses a traditional pulse-width modulation (PWM) battery-powered inverter with a high voltage battery pack. In the second case, the battery is connected to a bidirectional DC-DC converter and a variable DC voltage is produced and fed into the inverter. These two systems are respectively referred to as S1 and S2. Both systems are used to power the same surface mounted Permanent Magnet Synchronous Motor (PMSM) and are designed to operate a class 4 delivery truck. The truck is designed to be driven by one motor attached to each rear wheel assembly. Furthermore, the efficiency maps of these systems are examined in the context of a standard drive cycle for a delivery truck.
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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 | 0.000 |
| 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 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".