Miles/kWh

[T1 Terry]

It would be interesting to compare the energy use between a stardard EV and an EV with a 2 sp ratio available, allowing for a higher motor speed to wheel speed when max torque is required, then direct drive when low torque to rpm ratios are required ........

T1 Terry

 

[Cabansail]

So, not actually a practical suggestion for the vast majority of people going on trips outside of town.

For sure, it's true that you will get much better energy utilisation at 85kph vs the speed limit of 100 or 110kph. One of the best things to do if you are in danger of not making it to the next recharging station is to SLOW DOWN.

But... that's a very impractical methodology to PLAN on going slower than the speed limit and peeing off the rest of the vehicles driving it, particularly the single lane highways where commercial vehicles are using it along with the rest of us.

It takes a deal of effort for a B-Double to overtake someone pottering along well under the speed limit and causes everyone else stuck behind them to get cranky and think about performing dangerous overtaking manoeuvres.

While you may be maximising your energy efficiency you're not being the most thoughtful person to the rest of the road users.

Anyway, that's my take on it and I apologise if you feel I'm being rude, but I think it needs to be said.

I do plan on the trip at this speed, but have done it at the speed limit too. The difference of arrival time is about 15 to 20 min. Not much when not in a hurry.

The route I take is just about all dual lane, so not really affecting anyone else. Locally to reach the highway there is some single lane roads, but most of it has an 80kph speed limit. At the other end all the roads there are 60kph or 50kph. I do keep to the left lane at those speeds, unlike the Queensland convention of going slow in the right lane (Probably a side effect of eating too many straight bananas)
I am not trying to inconvenience anyone else.

These are definitely sensible things to address, that being said, "auto boxes" don't apply to our EVs. They have a single gearing ratio to ensure the car can achieve it's performance design acceleration and top speed. There is no additional "drive train loss" associated with it's use over the alternative, given that there

I am well aware that EV's are NOT Auto's and that is why I bought one. When my last ICE car was written off I could not buy a replacement without it being Auto. The dealer list EV's as "Auto" which is incorrect. They do use the same letters as Auto's, which is why I refer to them as pseudo Auto's.

is no alternative

It's not as though there's a choice between a "Manual" EV and an "Auto" EV.

Pumping up your tyres is a really good thing to do. You should check tyre pressure regularly in any event.

Agreed. I run the tyres at about 39psi

 

[Jamesrr]

It would be interesting to compare the energy use between a stardard EV and an EV with a 2 sp ratio available, allowing for a higher motor speed to wheel speed when max torque is required, then direct drive when low torque to rpm ratios are required ........

I don't get it.

The torque the electric motor supplies is essentially constant irrespective of speed.

All I can see is you are adding additional mass for no gain.

?

 

[Archev]

I don't get it.

The torque the electric motor supplies is essentially constant irrespective of speed.

All I can see is you are adding additional mass for no gain.

?

I think I agree.

 

[T1 Terry]

When an electric motor is in the high torque curve, the energy use is the greatest, when spinning at high rpm it produces drive energy but less battery energy to produce it .....
yeah, that didn't even make sense to me when I reread it, I'll blame toasting the good health of Jack Daniels as New Yrs approaches over this side of the globe

T1 Terry

 

[Archev]

When an electric motor is in the high torque curve, the energy use is the greatest, when spinning at high rpm it produces drive energy but less battery energy to produce it .....
yeah, that didn't even make sense to me when I reread it, I'll blame toasting the good health of Jack Daniels as New Yrs approaches over this side of the globe

T1 Terry

Happy new year Mr Daniel’s and all his devotees.

 

[T1 Terry]

I'll try this way of explaining it. When converting an ICE powered car to an EV using a 3phase motor, driving in a lower gear, such as 2nd, uses for less current (amps) that driving in 3rd or forth gear ......

It is an advantage to run a 4:1 diff compared to a 2:1 diff when doing an EV conversion

T1 Terry