Yes the aim is AC Ammeter and Clamp meter testing.
You don't need huge charge capacity, just large power capacity. A car battery would probably be fine, and I don't think the price is beatable.A lead acid battery (assuming you're talking about the 150Ah type battery used in UPS inverter systems) will be:
a) Too large
b) Too expensive
c) Not feasible
A FET bridge driving a coil basically is a SMPS. You just need an unregulated DC supply (battery), a PWM'd bridge, a coil, and a feedback loop.I'm inclined towards SMPS as this will be cheap, small and practically portable. The issue is that I've never worked at such current levels.
Yes, a full bridge is a good candidate. It should be driven such that the body diodes only briefly conduct current during transitions.Can I use 4 high current MOSFETs without antiparallel body diodes kept always on? If so suggest suitable 100A+ MOSFETs with low Rds and without body diode.
Was going to suggest this. For a current transformer or hall effect ammeter, there's basically no difference between one wire carrying 150A and fifteen turns carrying 10A. Obviously this won't work with a shunt ammeter.That also works very well for those LEM Hall current sensors which are typically scaled for +/- 75A dc or 75A peak ac.
That is often inconveniently high if you are only measuring a very few amps.
Wrap a few turns through the hole and problem solved.
If the turns are evenly distributed around the circumference of the core, I agree.But as far as I'm aware of, you can still achieve 0.1% accuracy with multi turn configuration of DC current transducers.
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?