Current Imbalance Tests in Asymmetrical Parallel Connected IGBTs for High Current Applications
Bibliographic record
Abstract
This paper presents a static skewed IGBT gate drive, and investigates the impact to power semiconductor switching compared to the traditional double pulse method test. The method is able to test the performance of parallel connected insulated gate bipolar transistor (IGBT) modules for high current applications. The current-sharing between the parallel-connected IGBT modules is often addressed using gate-drive timing. However, using this test method, it is observed that poor sharing can be introduced by the di/dt arising from the switching in other legs in the inverter. We show current sharing behavior for different AC link arrangements, including quasi symmetrical and asymmetrical for three 300A IGBT modules. The experiments are presented for up to 250V<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dc</inf> and a load current of around 800A. Regardless of AC link arrangement and in the presence of the di/dt in the load, the current sharing is easily upset. Lastly, a control signal is introduced to improve current sharing among parallel devices.
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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 | 0.001 |
| 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".