Quote:
Originally Posted by Crashy
Who are you talking to?
Did you even read the thread before commenting?
I said NOT to use active rectification, instead use AC rotor current rectification.
I said use a 24v alternator and convert it to 12v. I never suggested changing everything in the vehicle to be 24v.
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Okay fair enough, an AC rotor works, but it costs more to have commutation with brushes...probably a lot more. Diode losses are half as much at 24V though, so it might not even be worth the expense.
Uh, I did say 24V and implied conversion to 12V. That's what a DC-DC converter is for. They're expensive! It's really not a surprise that 24V hasn't caught on, with alternators being as cheap as they are.
Personally, one day when I have some spare time, I'm going to run a sensored BLDC motor with a controller and high voltage battery to make a mild hybrid. Thin laminations from a high quality motor takes care of the efficiency issues with a permanent magnet, but alternator makers are too cheap to use them.