Non-uniform Spacing of Ferrite Bars for Optimizing a Solenoid-based Wireless Electric Vehicle Charger with Automatic Self-Alignment
Bibliographic record
Abstract
This paper presents the design of a dual-coil charging pad for Wireless Power Transfer (WPT) in Electric Vehicles (EV). An electro-magnetic coil, denoted as the DC coil, generates a magnetic force that horizontally aligns a linear-slider-mounted transmitter pad to the receiver pad. A solenoid-based coil, denoted as the ac coil, is capable of 5kW WPT, which is performed only after the self-alignment of the pads. Two areas of optimization for the solenoid-based wireless charger are presented: optimum ferrite bar spacing and shield design. By using copper shields composed of a continuous sheet instead of multiple pieces connected with tape, the simulated eddy current loss is reduced by 29% while minimizing leakage flux from the ac coil. The optimum ferrite bar spacing is verified on a prototype of the dual-coil charging pad and allows the power capability to increase from 3.7 kW to 5 kW, without additional ferrite bars while achieving a peak DC-dc efficiency of 90.1%. The prototype of the DC coil generates a peak magnetic force of 3.51 N while also achieving a wide horizontal misalignment correction range of up to 240 mm.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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".