DougWantsALeaf wrote:Any feel for where Nissan is lagging in drive train consumption?
Tesla has created a more efficient motor and inverter. I haven't seen how it compares to other companies, but the new motor/gearbox/inverter combination resulted in an increase in range of a Model S from 335 miles to 370 miles
, with no change to the battery pack. Tesla vehicles are also more aerodynamic, which helps efficiency at highway speeds.
The improvement in the Model S was due to a swap from the old induction motors that were always less efficient overall than the PM used in the LEAF. The new-fangled SRM motors of Tesla are I think as efficient as PM or perhaps more so but not by a huge margin. I'm not sure about the inverter. You can get a feel for drivetrain efficiency by taking the EPA highway numbers (that approximate 65 mph driving) and subtracting Aero and Wheel resistances. I've forgotten how much the AP functions of the Tesla consume.
Tesla Model 3 LR:
0.009 Tyre RR (assumption)
Frontal Area: 2.34 m*m
At 65 mph (105 kph) it works out to 117 Wh/km (189 Wh/mile)
EPA is 241 Wh/mile (corrected for presumed 12% charging losses)
So the difference is 52 wh/mile of which the drivetrain is the lion's share
The Chevy Bolt is 269 Wh/mile EPA of which 232 Wh/mile is Road+Aero
The e-tron is 405 Wh/mile of which 260 Wh/mile is road+Aero. That car has major drivetrain issues.
I leave the LEAF to you