Or anyone who wants to take the car to a track or drag strip (like myself).I agree. For Germans it is an issue
My favorites are the speed limits that suddenly go +/5 mph on the exact same piece of straight road as I cross a state boundary in the middle of nowhere. So one has to assume the + state must use a road surface with more magical properties ? as there is zero difference in conditionsThere is a reason for speed limits
Of course it is a safety aspect. Although speed itself is not the crucial factor here.... the humans are......Or anyone who wants to take the car to a track or drag strip (like myself).
The point of the article was just using facts in light of your “there is a reason for speed limits” comment.
Unless I assumed incorrectly that you were referring to some sort of safety aspect? Data proves otherwise.
Cost and complexity of designing a multi-speed transmission for the EV is the main reason. And it really comes down to a cost/benefit analysis. We have multi speed transmissions in conventional cars because internal combustion engines for the most part have a very narrow power band. Multiple gears is how we wring as much power out of those engines while propelling the car down the road while still being efficient.I don't understand, why there is no some sort of Overdrive mode on EV's that would work like second gear or something.
I think I read the 2 speed for Porsche adds about 5% efficiency.Cost and complexity of designing a multi-speed transmission for the EV is the main reason. And it really comes down to a cost/benefit analysis. We have multi speed transmissions in conventional cars because internal combustion engines for the most part have a very narrow power band. Multiple gears is how we wring as much power out of those engines while propelling the car down the road while still being efficient.
But the electric motor is different. It has all the torque available at 0 RPM, and has a very wide power band where it can make most of its HP and still have maximum torque. No real need for a multi-speed transmission. Just one reduction gear necessary to keep the electric motor RPMs in a safe/efficient range for the car’s speed. There are multi-speed transmissions available for some EVs, but those EVs tend to cost at least double or triple the price of the highest end Mach E.
Now, some EV manufacturers have figured out how to emulate a multi-speed transmission by using multiple motors on the drive axel(s), and only energizing the appropriate motor at the appropriate time. Some have even employed a clutch to completely isolate the non-operating motor from the wheels. But this then starts to encroach on the complexity issue with a conventional multi-speed transmission.
Would a two or three gear transmission in an EV make it go a bit further on the same battery pack as a single gear? Absolutely. The question is, how much would it cost for how much extra range. Is the extra weight of the transmission less than a slightly larger battery pack that would allow the car to the same extra number of miles?
All modern electric motors used in EVs are multi-phase. Whether they are induction or permanent magnet motors is another thing.You forgot the multi-phase engine like what is used in the Tesla Model S.
I do not know how whether they are induction or permanent magnet affects them in automotive use. What are advantages and cons of each design?All modern electric motors used in EVs are multi-phase. Whether they are induction or permanent magnet motors is another thing.
This website offers a much better explanation than I could ever come up with:I do not know how whether they are induction or permanent magnet affects them in automotive use. What are advantages and cons of each design?
Bingo. The major difference between US and Germany is driver training. Compare the requirements and it will make sense why the Autobahn is still feasible there. It's not only about speed but situational awareness and lane etiquette. You don't see a beat up pick up truck parked in the left lane going 10mph under the limit over there.Of course it is a safety aspect. Although speed itself is not the crucial factor here.... the humans are......
So there is a reason for all those speed limitsBingo. The major difference between US and Germany is driver training. Compare the requirements and it will make sense why the Autobahn is still feasible there. It's not only about speed but situational awareness and lane etiquette. You don't see a beat up pick up truck parked in the left lane going 10mph under the limit over there.
On Hwy 401 near Toronto traffic is already 95 mph average at times so you think if passing that you only need 97 mph ? Never suggested staying at 115 mph but get by as quick as possible and back in your own laneFound the a**hole.