A 5kW Bi-directional Wireless Charger for Electric Vehicles with Electromagnetic Coil based Self-Alignment
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Bibliographic record
Abstract
Wireless Power Transfer (WPT) systems have been gaining traction in Electric Vehicle (EV) applications, primarily as an enabling technology for autonomous vehicles. Regardless of the coil type, misalignment between the transmitter and the receiver, which degrades the efficiency, has become a major impediment to the adoption of WPT systems. This paper proposes a compact WPT system for the rear of an EV, capable of correcting misalignment using two integrated electromagnetic coils. Electromagnetic simulations were performed to verify the 5kW WPT system under varying operating conditions with a maximum efficiency of 96.5%. An experimental prototype of the dual coil system was built with a charging pad volume of 1570 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . The symmetric nature of the system architecture allows for bi-directional power transfer; enabling Vehicle-to-Grid (V2G) operation in the proposed WPT system. The system currently achieves WPT at 5 kW with an efficiency of 89.8%. The system successfully aligns the transmitter and receiver pads within 1.75 seconds and corrects horizontal misalignment as large as 240 mm; 20% greater than the charging pad width.
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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