calculation · Voltage Intensifier Circuit · computed
Scotchn 10-turn core tests (20×20 mm section): effective µ, Kapton-gap equivalents, and DC saturation limit for 1000-turn chokes
- Source — Scotchn's report "Ten_Turn_Core_Testing_with_Report_v2 - Report.csv" (Discord 2026-09-25). Conditions: 10 turns, AL averaged over 5–20 kHz, L/Q at 10 kHz, small signal. The listed Rs is 88 Ω; what it represents is unknown and needs asking.
- DATA — Toroids 120 mm OD, 20×20: A AL 11.16 µH, Q 22.9; B AL 20.74, Q 286; C AL 18.77, Q 38. Nanocrystalline C-core pair ("CD", 150×85 radiused rectangle, 20×20): no added gap AL 34.0, Q 38; 1× Kapton AL 16.43, Q 61; 2× Kapton AL 9.63, phase 39°, Q 0.81; 3× Kapton AL 6.21, phase 42°, Q 0.90.
- DERIVED (A = 4 cm², le ≈ 0.37 m for the C-core, π·100 mm for the toroids): µe CD no gap ≈ 25,000, 1× gap ≈ 12,100; toroid B ≈ 13,000, toroid A ≈ 7,000. Equivalent total air gap: 1× Kapton ≈ 16 µm, 3× ≈ 66 µm.
- SATURATION — I_sat ≈ B·A/(AL·N). At about 1 T usable and N = 1000: no gap ≈ 12 mA DC, 1× gap ≈ 24 mA, toroid B ≈ 19 mA. All are far too low for a unipolar resonant charging choke. The ungapped toroids have the same DC-bias problem as the ungapped C-core.
- ANOMALY — the Q collapse at 2× and 3× (phase about 40°, L at 10 kHz below the AL average) is not normal gap behaviour, since adding gap usually raises Q. Suspects: a shorted turn from a metal clamp or band, fringing eddy loss at burred cut faces, or measurement de-embedding as |Z| falls near or below Rs. Needs a frequency sweep and a non-metal clamp.
Basis
- Method
- unversioned-legacy
- Recorded
- Published
- 25 Sep 2026
- Stanbot
- v3
- Source Ref
- Scotchn, Ten_Turn_Core_Testing_with_Report_v2 - Report.csv, Discord #neuralstan20-testing 2026-09-25; extends #3431
- Notebook Id
- 3432
core-selection nanocrystalline gap saturation bench-data