Status: design review / validation prototype. No sample measurement is included. This document is not a production performance guarantee, customer approval record or evidence of a delivered 300 A product.
Published Design Scope
Part numberPMT-NPV100X70-300A-28T-IND
System configurationTwo independent 28-turn inductors are required per system
Core conceptPOCO NPV-40-I FeSi, zero functional-gap mating surfaces
Mechanical envelopeApproximately 100 × 70 × 160 mm per inductor concept
Operating review point16 kHz, single-circuit +300 A DC bias
Cooling inputForced-air cooling is required for the calculated copper-loss case
Calculated Values and Boundaries
| Item | Published value | Evidence status |
|---|---|---|
| Zero-bias inductance, L0 | Approximately 338 µH | Calculated; single-circuit DC-bias model |
| Inductance at +300 A, nominal | Approximately 158 µH | Calculated; not measured |
| Inductance at +300 A, worst case | At least 137 µH | Calculated with material tolerance and temperature derating |
| DCR at 100 °C | Approximately 4.4 mΩ | Calculated from MLT estimate; not measured |
| Copper loss | 177 W at 200 Arms / 399 W at 300 A peak | Calculated; cooling and waveform dependent |
Validation Gate Status
| Gate | Required evidence | Status |
|---|---|---|
| Input confirmation | Confirm 300 A circuit current, 16 kHz carrier and acceptance of measured NPV-40-I material curve | Open |
| Calculation / FEA | Predict loaded inductance and center-leg flux density over temperature | Calculation included |
| A-sample at 25 °C | Measure L at +300 A and record temperature rise or abnormal noise | Not provided |
| Hot-condition DVP | Verify hot loaded inductance, hi-pot and temperature rise | Not provided |
| Production control | Approved control plan including L0, DCR, L at +300 A and hot-condition data | Not released |
What This Evidence Does Not Prove
It does not prove measured 300 A performance, a 120 µH production rating, universal temperature rise, reliability lifetime, customer approval, delivery history or production release. Those conclusions require the named prototype, the approved test conditions and signed project records.
English Design-Review Drawing
Four-page A4 landscape PDF translated and formatted for international engineering review. The calculation, measurement and release boundaries are repeated on the document.
Download PMT-NPV100X70 PDF Send Project ParametersEngineering contact: +86 13267069291 · zyong@promagtech.cn