Thread: Goingbush's Electric Vehicle project

Originally Posted by goingbush

Yes, for an Electric Vehicle its very loud.

noise before and after , Compare both taken with the same camera .

Before = LandRover Lightweight, test drive - YouTube

After = LandRover EV Conversion, First drive part 3 - YouTube

No factory EV has a gearbox , but they typically do about 5000RPM at 100kmh , 4.7 is too high , Tesla has something like a 7:1 final drive.

Interesting. So you actually want the electric motor spinning faster than it is currently?

Drive around in low range?

Smaller tyres?

Originally Posted by AK83

I'm also curious as to how well it works up and down steep inclines.
Theoretically the low down(Instant) torque of an electric motor should make uphill a cinch! .. and low range downhill much better than any combustion engine'd vehicle(diesel or not).

Also would higher gearing help with electrical consumption too ... have you done the math/calculations to try to improve speed/economy balance? Interesting. So you actually want the electric motor spinning faster than it is currently?

Originally Posted by dickyjoe

Interesting. So you actually want the electric motor spinning faster than it is currently?

Drive around in low range?

Smaller tyres?

Since its an A/C motor we have regenerative braking, the motor becomes a generator with foot of throttle , This way it can hold back quite well going down hills . I have a potentiometer on dash to adjust braking amount, the pot is meant to be attached to brake pedal but I thought it more useful to experiment with it as an adjustable hill descent , not that theres any hills around here :0

In the 3rd video just when I come out of the track & put it in High Range there is a bit of a hill toward the exit from the park, It drives up in High 4th - no way ever I could go up in 4th going that slow with internal combustion. (all the low range in video was low 4th)

This motor has a sweet spot where max HP meets Max torque at about 4500 RPM, the correct gearing for that at 100kmh with 6.50-16 tyres is 3rd overdrive . 3rd gear at 80kmh would be the most efficient taking wind resistance into account (best range), Each motor design has a different sweet spot . This one has a max of 10,000 but I am keeping it below 6000 , dont want the flywheel to explode.

to me the EV sounds much more quiet, even tho the predominant sound if the gearbox/TC/diff whine.
Although the combustion engined recording was also done ona gravel road which probably contributed a lot of additional sound of suspension/body noise too.

Originally Posted by AK83

to me the EV sounds much more quiet, even tho the predominant sound if the gearbox/TC/diff whine.
Although the combustion engined recording was also done ona gravel road which probably contributed a lot of additional sound of suspension/body noise too.

I might add a bit of moreys to the gearbox / TC / diffs

Was gonna say have u checked the oil levels??

Cheers Rod

Cool vehicle btw

Have put the build on my website, all in one place, I think I got it all covered.
plenty of grammar & spelling mistakes I'm sure !!

Its going like a ripper , too hot to do a proper range test (batteries don't like charging when hot) been 38-42 every day But 55k for 50% is not bad !!

this link --> Going Bush

Haven't looked at your feed over the break goingbush, but wow, that it's really fantastic to see your project coming to fruition! Looks like a ripper - great work!
Col

Ouch, Went to the nearest weigh bridge yesterday , 35km away

Landy is exactly 90Kg lighter than when I had it weighted for initial Rego ,
And that was with one empty tank & one half full tank, no spare & no tools, This time was weighted up with tools & all. So I'd say an easy 150Kg lighter in reality.


But bummer , Car stopped 10km from home , One dell drained out real fast whilst all the others are still healthy.
$160 tow truck ride thank you very much.


Ive charged it back overnight & Ive been hammering the car this morning, It really flies when your "trying" to drain the battery , I usually drive for economy !! The cell is looking good , maybe it drops off fast one below a trigger voltage. Anyway I do have a spare cell as I was originally going to use 46 but could only get 45 to fit. But I have to pull the seat box to change it.

I'll just monitor it for now & see if it really is a bad cell or just a random event.

Here is the BMS window, you can see the bad cell represented by the short stick !! Flat is 2.4 which it got to, bat had recovered some by the time I took the photo. I charge them to 3.45 so most of the other cells look pretty good.


(I really want to avoid having to buy a 5Kva generator ??)