| electric drive [message #353773] |
Mon, 13 April 2020 12:50  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
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To get the electric discussion out of Hal's discussion.
The motor referenced is 'synchronous' which indicates it's running on variable Hz A/C current developed in the inverter packaged in the wheel. In that it fits a caliper and disk, how much braking - if any - does it develop via regeneration? Assuming it doesn't, there isn't a great need for a battery pack. It would allow a smaller engine, but by how much is debatable. More to the point, what voltage do these things want? If it's a 75KW motor, at 100 Volts it wants 750 Amps. 12 volts would require 6250 Amps, both figuring no losses. The variable speed drives used in big air handlers are fairly efficient, we might expect to achieve 95% or better with this. This thing is gonna get hot one way or the other, which is why it's water cooled. Now we'll need hoses to the radiator and a pump or two. And some honkin' big cables.
The devil's in the details, of which we need more to play this mental game. So, what is a 300KW prime mover going to look like.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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