Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1858
| Posted: 02:23am 27 Feb 2025 |
That's interesting, I'm measuring them with a current source of up to 700A and a DSO, while they are not "quite" as good as the meatier 6 core stack (not available) they are close.
These are measured with a high current hall effect sensor and confirmed against a resistive shut for Hall Sensor transient response and indicated current.
Two chokes have been repeatably subjected to almost 600A daily for over a year, and as you say, they are working well, in this dual inverter they now see 600A peaks across 4 chokes.
It's a shame that we can't get the original cores, and cores in general at a decent price.
Edit: From memory I calculated around 9uH at full current for a single 9 core choke with original thicker cores, if the Sim is correct then I was close, 7uH @ 200A single choke, two chokes would be round 14uH at 400A, over 20kW input surge.
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Edited 2025-02-27 13:36 by KeepIS