48V advantage for a camper van alternator?
Is there an #ElectricalEngineer in the house, please?

I'm talking about the alternator, because from memory the magnetic field in iron is a limit no matter what the voltage, and so the limit on output is mainly about the frequency of changes in that field.

And it seems to me 4 times as many coils of copper with 1/4 the cross section would cost the same and take roughly the same space.

I understand the I²R losses in copper cables and fixed ~1.4V lost in a bridge rectifier would tend to make 48V a bit more efficient and lighter in weight, but people are calling it a 'revolution' or 'game-changer'. Are they exaggerating?

To me, the simplest idea is to take the rectifier and regulator out of the alternator, and use the extra space for airflow, plus add temperature sensing, so the alternator can be protected from
overheating when the cooling fan turns slowly (which I already know has been the end of many alternators run hard at idle speed).

Or am I missing something, please?

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“Pringle Switch”

I think these devices go up to around 6000 amps at 600V AC. I don’t think they are as common anymore in new construction with disadvantages compared to low-voltage high-current breakers like the Eaton Magnum breakers.

It’s not shown here but overcurrent and short protection is provided by fuses. Also, arc chutes aren’t shown here. I think some switches have arc chutes as well as a “flicker” blade that makes first, and breaks last, to handle any arcing. #ElectricalEngineer #electricity

https://www.youtube.com/watch?v=M1erBit_GdQ

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