3 ms·
Double the regenerative braking is why they get better range, I bet, despite being heavier.
by robotresearcher 7y ago
Double the regenerative braking is why they get better range, I bet, despite being heavier.
- kwhitefoot 7y agoThe two motors in a Model S are different ratings. It seems that at cruising speed the car can choose the most efficient one to use and let the other one 'freewheel'. Two motors probably gives better control over regen and certainly over braking but the regen rate seems to be determined by the battery, inverter, and design decisions. In my 2014 Model S 70D the maximum regen is about 50 kW, at least that's what the display shows, but the motors can develop at least 250 kW. I suspect it is also limited for safety reasons, 250 kW of braking would give deceleration of about the same magnitude as the maximum acceleration. At 100 kph (27.8 m/s) the car has an energy of about 1.62 MJ so at 250 kW it would come to a stop in 6.5 seconds. Actually my car does 0 to 100 kph in about 5.6 seconds so it clearly produces more than 250 kW. Sorry for rambling on, your comment set me thinking and then I just had to check my working.