Guru
Joined: 13/10/2014
Location: AustraliaPosts: 1845
| Posted: 04:28am 31 May 2023 |
Great work, I had a similar choke from China, it was wound on 3 Black toriod rings, same Toriods as I'm using for the Chokes I make.
I think the current rating they advertise is the current the choke will handle without melting
The Inductance was supposed to be 47uH (where have I heard that value before) and made for their big inverter boards. Turned out to be around 39uH, saturation was still fair at around 220A, which is never going to cut it for a decent inverter.
As you measured, there is not much Inductance left for big loads, OK for reducing idle currents, but nothing left when the going gets tough.
BTW: Found a permanent fix for the melting Fuse holder - I removed it
I'm going to do something I've been wanting to do for a while. Fit a 500A [700A] peak Hall Sensor on the DC input, and as the voltage output is so stable, accurate and noise free, it can be easily set to an exact Trip current, I'll use that to halt the Inverter drive and throw the Big Contractor solenoid open in the event of a catastrophic current surge.
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Edited 2023-05-31 14:29 by KeepIS