Besides the BMW 3 Series (if at all), what other cars in the M3 price range (if not, $10k more) will be offered in AWD?
Why two-motor hybrid systems are better than those with just one
Josh D • 10 hours ago
Another point some might find confusing is that the two motor benefit, basically only applies to HEV, and PHEVs, not pure BEVs. A large single motor does just fine in a higher powered BEV.
2
•Reply•Share ›
−
Avatar
Xiaolong Li Josh D • 3 hours ago
"A large single motor does just fine in a higher powered BEV."
Not exactly.
In e-Formula, they either add 2-3 gears for the main motor or like D series or Rimac1 or Nio EP-9, they add a second motor on a 2nd drive axle with different gearing for higher speed and high traction acceleration.
On many PHEV and HEVs, the 2nd motor is there for e-CVT to allow higher efficiency at higher speed without requiring a much larger battery and bigger main traction motor. In Voltec 1.0, the 2nd motor is just there to modulate the main traction motor as well as providing generator capability.
•Reply•Share ›
−
Avatar
George Danchev Josh D • 10 hours ago
Even in BEVs... duel motor (front and rear) is more efficient than a comparable (as power) single motor.... you don't need to transmit torque throughout the whole car, better weight and balance, better AWD, etc. Then four motors scheme has further advantages, ultimate (lighting fast and potent) torque vectoring - efficiency, control, safety, etc... avoiding the single-motor point of failure is also a win :/
Why two-motor hybrid systems are better than those with just one
Josh D • 10 hours ago
Another point some might find confusing is that the two motor benefit, basically only applies to HEV, and PHEVs, not pure BEVs. A large single motor does just fine in a higher powered BEV.
2
•Reply•Share ›
−
Avatar
Xiaolong Li Josh D • 3 hours ago
"A large single motor does just fine in a higher powered BEV."
Not exactly.
In e-Formula, they either add 2-3 gears for the main motor or like D series or Rimac1 or Nio EP-9, they add a second motor on a 2nd drive axle with different gearing for higher speed and high traction acceleration.
On many PHEV and HEVs, the 2nd motor is there for e-CVT to allow higher efficiency at higher speed without requiring a much larger battery and bigger main traction motor. In Voltec 1.0, the 2nd motor is just there to modulate the main traction motor as well as providing generator capability.
•Reply•Share ›
−
Avatar
George Danchev Josh D • 10 hours ago
Even in BEVs... duel motor (front and rear) is more efficient than a comparable (as power) single motor.... you don't need to transmit torque throughout the whole car, better weight and balance, better AWD, etc. Then four motors scheme has further advantages, ultimate (lighting fast and potent) torque vectoring - efficiency, control, safety, etc... avoiding the single-motor point of failure is also a win :/
