I-miev all electric car.

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Re: I-miev all electric car.

Postby FarmerJohn » Sun Aug 25, 2013 10:19 pm

Kurt, thanks for your postings about the i-miev.

I'm wondering about a project to convert my tractor :)
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Re: I-miev all electric car.

Postby offgridQLD » Mon Aug 26, 2013 8:18 am

A tractor would work. I have seen a couple of examples on Utube.

Rough rule of thumb is what ever HP motor is in the machine you can 1/2 that for a electric motor. A dC motor would be fine for a tractor. Cheaper and lots of torque good bang for the $. A large forklift motor might even be ok if the tractor is med/small size.The motor in my Imev was actually taken from a forklift though is't AC.

You wouldn't need very high voltage - RPM in a tractor 72v or so.Below is a few examples of some small tractor conversions.

http://www.youtube.com/watch?v=1YNCIIrQ0AU

http://www.youtube.com/watch?feature=player_detailpage&v=9YmbFtJlZpU


I have been trying to convince my old man that a electric motorbike would be great on his farm. Wouldn't spook the horses and just more pleasant to ride nothing like riding through a peaceful valley with just the sound of the grass whipping the front wheel and not the sound of a 4stroke in your ear :lol:

good example
http://www.youtube.com/watch?feature=player_detailpage&v=RbECu2fnnMo
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Re: I-miev all electric car.

Postby davidg » Mon Aug 26, 2013 11:23 am

FarmerJohn wrote:I'm wondering about a project to convert my tractor :)

I thought about this for sometime, but things like 2m slashers, 2m rotary hoes, grading and frontend loader with 1metre buckets pretty much rule it out for all but short period use, since my tractor is an old David Brown 57hp implematic. One of these days I'll convert it to combo Diesel & SVO instead, that still requires all the seals in the injection system replacing and then a source of Vege Oil, not to mention preheating it and still having diesel for startup and shutdown so it will not be too thick in the lines for start purposes. The heating of the SVO makes for easier flash point and better combustion under compression as well temp needs to be fairly hot, will have to go back and look at my notes. Then I can have a fish and chip tractor. :lol:
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Re: I-miev all electric car.

Postby jimbo » Mon Aug 26, 2013 11:27 am

Offgridqld, did you consider the Nissan Leaf? I think its based on the Tiida which would mean it's a larger vehicle.
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Re: I-miev all electric car.

Postby offgridQLD » Mon Aug 26, 2013 11:55 am

I looked at all my options.

Why I dint buy the The Nissan leaf is its $40,000 that's $15,000 more I payed for the Imiev.I could purchace enough off peek electricty at 15c kwh to drive the Imiev 750,000km with that 15k saving . Or perhaps purchace a new battery in 10 years.

The leaf is a more substantial car more like a Carola size where the Imiev is more like a honda jazz.It is a bigger car but that comes at a cost in weight its 1550kg! vs 1080kg for the imiev It has a larger battery 24kwh vs 16kwh ( so replacing the leaf battery in time will be more expensive to ) The leaf has a more powerful motor 80kw vs 50kw. Though real world range isn't much better than the Imiev and the performance is about the same due to weight. It consumes a lot more energy for every km traveled. There were also some concerns from the US about the leaf battery life in hot climates.

For me its all about whr - km. The bigger the electric car the more energy it burns just like a petrol or diesel car. The leaf has a very fancy dash that looks like the cockpit of the star ship enterprise. Some like that but it isn't my cup of tea.

The Imiev is Rear motor RWD . Something I guess it doesn't mater but I like that feature.

The Imiev is our run about the car we clock up all the KM on the space inside for the passengers is actually good. I'm 6ft tall and can sit in the back with my front seat where I usually have it. The rear cargo area is small (though we did fit our 35lt engle compressor fridge in there and some bags on the weekend) The rear seats fold flat. If we want to move a lot of cargo around we use our dual cab ute.

Regarding the tractor. How many kw would the motor be using for how long doing the work you need. Its that simple. I run a 5 foot howard nugget slasher on a little 24hp 3cy diesel tractor and the motor just hums along at 2800rpm. Perhaps 12kw or so from the engine. its all about torque on a tractor and electric motors have lots of it.

I little 25kw (constant rating) electric motor would do more work than a stock 50hp tractor motor could.You would have to see how much power (real world kw) you would consume doing the tasks. Then the limit is battery size. A 80kwh pack like the tesla model S has would give you 4hrs of use and a 30 min fast recharge potential for another 4hrs after lunch. Its just a matter of cost and ability to charge.

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Re: I-miev all electric car.

Postby FarmerJohn » Mon Aug 26, 2013 11:12 pm

I don't want to derail your thread. My tractor is only a baby (John Deere 2305, approx 18kw diesel, 16 kw at the PTO). Engine just drives the oil pump, everything is hydraulic. Main use is 60" mower deck, and 3-4hr mowing tasks. Sometimes I do rotary hoeing, and a 3' slasher gets used from time to time.

eBikes - no brainer, already on the list of wanted things.
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Re: I-miev all electric car.

Postby Bthree » Tue Aug 27, 2013 3:06 pm

offgridQLD wrote: The goal is to make it with a 2kw safety margin on the SOC.

We made it to the house 104km with 2 bars (2kwh) remaining on the SOC gauge and 9km on the RR gauge (though the RR was mare as its predicted from the last 20km were and all of that was uphill or undulating). We had a good load in the car to. two adults and one child, a Engel fridge(40kg including the food inside), luggage 4 bags 30kg and the charger.


Could you do me a measurement some time please with the back seats down and the front seats in their normal position for your driving, what is the boot floorspace back of seats to the rear door ?

Wondering how you are going to do the trip in summer with the aircon going ?
Also as the batteries age, that's not much of a margin !

Also really enjoying your posts about the I-miev.
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Re: I-miev all electric car.

Postby offgridQLD » Tue Aug 27, 2013 3:56 pm

Distance from rear door to back of seat is 1300mm with me driving 6ft seat all the way back. 1500mm with my wife driving 5ft 2'. Height of rear opening is around 700mm .

To start with this trip from Brisbane to the Sunshine coast is a temporary need until we move to the off grid house full time. So by the time the battery's Age enough to degrade the range we wont need it.There are people with 50,000km on there Imiev without any noticeable range reduction.

For now I don't think running the Ac even on the way up is a issue. It would be lucky to use 1kwh (probably less) over the 1 1/2hr drive and we have that spare. That said we usually do the trip up at night so never use the AC on the trip up.The trip Back isn't a problem running the AC as we have 4-5kwh spare in the bank.

Again we didn't purchase the car to do this trip. The fact it dose it great though. It was more for a local runabout at the Sunshine coast. Driving to town - 12km one way. Driving to coast 35km one way. Driving to larger towns in the area 25 - 40km and all this is well within its range no matter what the conditions or how you drive it.

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Re: I-miev all electric car.

Postby offgridQLD » Wed Aug 28, 2013 10:04 pm

Not my video but same model car. Saves me doing it and getting a fine filming and driving at the same time.

This video is a good representation of how quiet the car is inside accelerating from 0 - 136kph and then regen braking back down to 0 kph again. It takes the Imiev 10 seconds to go from for 0 - 100kph. I find that more than adequate. The car would keep accelerating hard to much faster speed but as you can see as soon as you reach 135kph the computer reduces the power to keep the max speed limited to 135kph.

http://www.youtube.com/watch?feature=player_detailpage&v=iUI6oW_T2xk

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Re: I-miev all electric car.

Postby davidg » Thu Aug 29, 2013 4:57 pm

offgridQLD wrote:as soon as you reach 135kph the computer reduces the power to keep the max speed limited to 135kph

Damn speed limiter how dare they :lol:
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