tractor conversion
tractor conversion
Hello
I want to convert small tractor to EV I have 16 x lifepo4 200 Ah for the project.
I want the conversion to be as cheap as possible, so Im looking to rewind industrial 4 pole 400 V AC motor 7.5 kWh to 22V .
original diesel engine in this tractor is 31 kW peak at 2250 rpm and 149 nM torque at 1400 rpm.
what peak torque can I expect from this motor?
As I understand I need to add an encoder to the motor, where can i get one that would work with let's say Kelly KAC-8080I
or would 10kW bldc be a better option ?
Thank you
I want to convert small tractor to EV I have 16 x lifepo4 200 Ah for the project.
I want the conversion to be as cheap as possible, so Im looking to rewind industrial 4 pole 400 V AC motor 7.5 kWh to 22V .
original diesel engine in this tractor is 31 kW peak at 2250 rpm and 149 nM torque at 1400 rpm.
what peak torque can I expect from this motor?
As I understand I need to add an encoder to the motor, where can i get one that would work with let's say Kelly KAC-8080I
or would 10kW bldc be a better option ?
Thank you
Renault ZOE R240 upgraded to 41kWh
scooter govecs GO1.2 converted to lithium
Solar installation 11 kWp
20 cow's
scooter govecs GO1.2 converted to lithium
Solar installation 11 kWp
20 cow's
- jonescg
- Senior Member
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- Joined: Thu, 21 Jan 2010, 23:05
- Real Name: Chris Jones
- Location: Perth, WA.
Re: tractor conversion
What kind of work will it be doing? Will it be doing any serious cultivation or mainly towing things? Because the motor need not be too amazing. A re-wound industrial AC motor would certainly fit the cheap requirements, but it might need some kind of cooling added.
4 pole is ideal for most applications, and any VFD will make it spin, you just need to find a reasonably efficient one.
4 pole is ideal for most applications, and any VFD will make it spin, you just need to find a reasonably efficient one.
AEVA National Secretary, WA branch chair.
-
- Senior Member
- Posts: 2489
- Joined: Mon, 26 Nov 2007, 05:39
- Real Name: Matthew Lacey
- Location: Perth, WA
Re: tractor conversion
An encoder is only needed it you want fine torque control. On a tractor you could probably get away with either speed control only, or course torque control that running open loop without an encoder would offer
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells
- Richo
- Senior Member
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- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
- Location: Perth, WA
Re: tractor conversion
Although the specifications match your tractor I'm skeptical that someone would rewind it to 22Vac.
When you think about 400Vac/22Vac this is 18:1.
I'd think this would mean you'd only have 3 or 4 conductors per slot.
Or many in parallel.
This would add perhaps AUD$1,000 to the cost of the conversion.
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!
- Richo
- Senior Member
- Posts: 3737
- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
- Location: Perth, WA
Re: tractor conversion
Possible alternatives are a series DC motor:
A00-4009
203-06-4001
ME1002
A00-4009
203-06-4001
ME1002
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!
- Richo
- Senior Member
- Posts: 3737
- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
- Location: Perth, WA
Re: tractor conversion
Possible alternatives for Magnet motor:
ME1302
ME1616
ME1507
ME1302
ME1616
ME1507
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!
Re: tractor conversion
thank you !
It will be doing light work, for heavy work I have this one
[tube]https://youtu.be/e2CAHfJqlFM[/tube]
The speed controll would be the best for tractor as it is the case with diesel engine.
The rewinding will not be the problem I would use the same wire but meny of them in paralel, the problem I'm expecting is with 3 or 4 wounds per coil I will not be able to make the motor 22 V but hope close to that .
I could lift the battery voltage but I'm planning to simply put my power wall 48 V lifepo4 cells to tractor and then use it for both aplications

Local rewind shop would charge me 300 € for rewinding 7.5 kW motor to lower woltage , and I already have a suitable motor in my junk bin : I also have a DC motor in my junk bin: I gues I could rewind the stator coils to lower voltage but this one does not have shaft that would allow me to mount a flywheel, ....
Comments appreciated
Renault ZOE R240 upgraded to 41kWh
scooter govecs GO1.2 converted to lithium
Solar installation 11 kWp
20 cow's
scooter govecs GO1.2 converted to lithium
Solar installation 11 kWp
20 cow's
- Richo
- Senior Member
- Posts: 3737
- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
- Location: Perth, WA
Re: tractor conversion
The Kelly controllers do seem to be the cheapest option for an Induction motor.
KAC72601-8080I USD$700
KAC72701-8080I USD$800
They require a "Dual channel A/B encoder" to work.
I'm assuming they mean a quadrature encoder.
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!
- Richo
- Senior Member
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- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
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Re: tractor conversion
Please don't buy this it's only an example
https://www.aliexpress.com/item/893080068.html
https://www.aliexpress.com/item/893080068.html
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!
- Richo
- Senior Member
- Posts: 3737
- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
- Location: Perth, WA
Re: tractor conversion
A curtis controller might work too:
1234SE-452X
1234SE-562X
But I expect they'll be harder to get and cost more.
1234SE-452X
1234SE-562X
But I expect they'll be harder to get and cost more.
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!
Re: tractor conversion
So kelly or slider will not work without encoder ?
in speed mode?
slider:
https://www.alibaba.com/product-detail/ ... 3e5fw0fNC3
in speed mode?
slider:
https://www.alibaba.com/product-detail/ ... 3e5fw0fNC3
Renault ZOE R240 upgraded to 41kWh
scooter govecs GO1.2 converted to lithium
Solar installation 11 kWp
20 cow's
scooter govecs GO1.2 converted to lithium
Solar installation 11 kWp
20 cow's
-
- Senior Member
- Posts: 2489
- Joined: Mon, 26 Nov 2007, 05:39
- Real Name: Matthew Lacey
- Location: Perth, WA
Re: tractor conversion
likely the best answer is we won't know until someone tries it.
There may be a setting to run straight v/hz
It would be worth contacting kelly controls and asking
There may be a setting to run straight v/hz
It would be worth contacting kelly controls and asking
Matt
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells
2017 Renault zoe - 25'000km
2007 vectrix - 156'000km
1998 prius - needs Batt
1999 Prius - needs batt
2000 prius - has 200 x headway 38120 cells
- Richo
- Senior Member
- Posts: 3737
- Joined: Mon, 16 Jun 2008, 00:19
- Real Name: Richard
- Location: Perth, WA
Re: tractor conversion
I did scan over the kelly manual yesterday and I was under the assumption it is required.
Someone must have already done it - its a case of finding it.
When I have more time...
Someone must have already done it - its a case of finding it.
When I have more time...
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
Help prevent road rage - get outta my way!