Regenerative Braking

[goingbush]

Simple Demo . I had no idea it was putting more than 200Amps in during gentle braking , (I cant really see the screen and drive safe at the same time)

All the braking here is regen, only time service brakes are used it to come to a full stop in the parking bay.


https://youtu.be/T6WyrG2CUT0

[goingbush]

I made an A-Frame , connects to Helicopter lifting points .

I'll tow the Landy in regen mode with the Iveco & see how long it takes to put any meaningful charge back into the battery pack. It will be interesting to note if there is any increase in fuel consumption of the truck.

https://scontent-syd2-1.xx.fbcdn.net/v/t1.0-9/47042255_1967759379972509_7540067756759056384_o.jp g?_nc_cat=100&_nc_eui2=AeGvaavn5F_FuliG-K43NM1QiY7PLWoMqwfqVGuZB1I7JHgQmYuoPfwnWq8G0PwLRs_ ET42fdj_joq6WFTL4iQQ2zGiol6gOM-ioqhSLzn35ZQ&_nc_ht=scontent-syd2-1.xx&oh=60f61cb87b7d557770ab9d4b18c17c6d&oe=5CA3BDC6

[Blknight.aus]

I Figure you'll notice about an extra 6l/100 on top of what you would normally see just towing the landy while it was not regen braking, with the battery pack near flat tapering off to about 1l/100 once the charge is up near 90%.

[goingbush]

I Figure you'll notice about an extra 6l/100 on top of what you would normally see just towing the landy while it was not regen braking, with the battery pack near flat tapering off to about 1l/100 once the charge is up near 90%.


Yeah, thats a pretty good call, Bk .

I usually get about 18.5L/100km , Towing the Landy today was pulling 25L/100km , Literally was like towing with the brakes on , - I suppose it is .

This is a 3 min clip from total, at the start of towing I had 54% State of Charge, after 15 mins was 78% SOC .


https://youtu.be/V58pb3kHXoQ

[Blknight.aus]

was that 100% regen setting?

with whats in the vids in theory you should be able to go from about 5% to 95 in less than an hour.

not sure how the batteries would like it though.

[goingbush]

No not 100% regen , it was about 50% in that clip. I didn't like the idea of a wheel skidding on the verge as I pulled over or that much negative torque through my diff ?

The Batteries are rated at 200Amp x 3C so can be charged at up to 600Amps . Anything over that & my 600Amp main fuse might put a halt to the proceedings.

[AK83]

A question(just out of curiosity) .. say on a long steep(or even moderate) descent, does the regen activate, and could you somehow (say) set it up where it would maintain a steady speed, automatically?

[weeds]

A question(just out of curiosity) .. say on a long steep(or even moderate) descent, does the regen activate, and could you somehow (say) set it up where it would maintain a steady speed, automatically?

Just like cruise control

[rover-56]

Just like cruise control

HDC [smilebigeye]

[Blknight.aus]

my 600Amp main fuse might put a halt to the proceedings.


I've lost my redneck conversion chart, is that the wad of tinfoil, roofing nail folded in 2 or the .22 round?

[goingbush]

I've lost my redneck conversion chart, is that the wad of tinfoil, roofing nail folded in 2 or the .22 round?

Probably more like a .50 cal :)

[goingbush]

A question(just out of curiosity) .. say on a long steep(or even moderate) descent, does the regen activate, and could you somehow (say) set it up where it would maintain a steady speed, automatically?

Yes Arthur,

The motor goes into low level regen when you back off the throttle, its about the same as engine braking.

But further there is a 5K pot supposed to be hooked to the brake pedal to increase regen as you push the pedal down but I thought it would be more useful for me to mount the pot on the dash and vary the braking by hand to use as a "Hill Descent" control .

I have a switch on the pedal & I just set the regen pot on max for normal driving, in the wet I back it off so as to avoid a rear lockup.

So instead of using the brake pedal on long descents or Low Range hills I just pull the red knob , and vary the level according to the speed I want to maintain.

Yet to test it on proper hills as its rather flat around here but I'll trailer it to Mt Buffalo one of these days.

The orange thing is the camera I used to capture the display data.

https://scontent-syd2-1.xx.fbcdn.net/v/t1.0-9/46894247_1970525196362594_2752675133058449408_o.jp g?_nc_cat=105&_nc_ht=scontent-syd2-1.xx&oh=20ca72f0d1906fc8b755442e4934d98c&oe=5C9E6197

[goingbush]

Heres a dashcam clip of running along a road at 65kmh and pulling the red knob, regen set about 50% .
On the slight decline on the dirt bit the "descent control" was on max then i decreased regen level with dash potentiometer & then max again. Foot brakes not touched at all . Learning as I go here.


https://youtu.be/8Dy28Fg28bg

[goingbush]

All the power levels , throttle map and regen braking etc. are programmable to suit vehicle use & driving style.
The CAN data bus connects in behind one of the gauges so I have to get in there for programming.

The Current limits menu is where the braking levels are. the list below is a saved file of factory settings , Ive dropped the RPM back to 5000.

https://scontent-syd2-1.xx.fbcdn.net/v/t1.0-9/46297039_1953451771403270_1557148751171158016_o.jp g?_nc_cat=100&_nc_ht=scontent-syd2-1.xx&oh=64f5e04b89115fb33b0073e06115cd74&oe=5CA8AB1B

https://scontent-syd2-1.xx.fbcdn.net/v/t1.0-9/46348673_1953451964736584_9148062770321686528_o.jp g?_nc_cat=109&_nc_ht=scontent-syd2-1.xx&oh=79c3bb10073af591110d3a502241d8e4&oe=5C9F023A