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rcmaehl OP t1_iu1otwm wrote

Reply to comment by PoopCrayon70-1 in The inside of an Electric Vehicle Charger. by rcmaehl

AC coming in has to be 3 phase though? Can't just throw these on residential lines.

This is entirely based on random reading of US highway charging station planning with the infrastructure bill that passed so I'm not 100% sure what I'm talking about, just that it was mentioned as required and not available everywhere.

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PoopCrayon70-1 t1_iu1pcyh wrote

Common misconception but good question. It can be single phase or 3 phase depending on the supply voltage. That is achieved through a transformer.

These types of applications involve an inverter that will convert ac to DC.

I don't know much about DC but this application screams DC

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Gaff1515 t1_iu27s78 wrote

That is a dc fast charger and almost certainly has 3 phase ac coming into. Output is likely 150 or 350kw dc

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PoopCrayon70-1 t1_iu30tvv wrote

Almost certainly? So in your expert opinion: is is 120/208, 120/240, 277/480¿

One of these answers makes it a trick question...

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Gaff1515 t1_iu3xed5 wrote

Actually none of those answers makes it a trick question. All three of you choices can be three phase. Maybe you’re not the expert you think you are on AC. (120/240 can be 3 phase with a high b leg, very uncommon but still exists in Chicago area).

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