Hopefully? Another 48vdc-240vac Toriod Inverter build.


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KeepIS

Guru

Joined: 13/10/2014
Location: Australia
Posts: 1845
Posted: 10:34pm 30 May 2023      

Yes, Poida discussed the correct way and the math to do this using a saturation tester and DSO. It also allows you to calculate the Inductance at various points as you climb the slope to full saturation.

It's only as accurate as the particular Current Sensor. I find the unidirectional DC Hall current sensors I use have response times in microseconds, whereas most of the AC sensors I looked at were quoted in tens of milliseconds.

Forgot to add, I tested my Sensor against a Big resistive shunt, it was almost as fast as the Shunt, and matched it way past 600A, the only thing between the DSO and the Shunt was a piece of shielded coax, so pretty impressed with the Hall Sensor.

The advantage of good Hall Sensor is Isolation from High current spikes and noise in the Choke and discharge power driving it, obviously something a shunt is physically connected to.      
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Edited 2023-05-31 08:44 by KeepIS