0 to 60 in 2.15 sec - max 80 mph student EV using AMK

[BigOutrunner]

I just wanted to share this.
A student assembled EV with zero to 60 of 2.15 seconds and max of 80 plus.

The link to the article on Wired:
http://www.wired.com/autopia/2013/09/dut12/

And the link to the video of a speed run:
http://www.youtube.com/watch?v=cSG5gDjnEOM

So much for the argument that unsprung weight is hindered.
I guess for a 'car' this size and build, it doesnt' matter.

The motors are AMK, if I'm not mistaken.

Thanks.

 

[Doctorbass]

Wow.. just Amazing!!!

Congrat to the DUT racing team!!

It seem theya re using one motor in each wheel? ( i have to investigate about that..)

here is the real video of the record:

http://www.youtube.com/watch?v=fGna6CPDXDk&feature=share&list=UUxGkb1yCGvNbuEhlbmjqlRw

Doc

 

[LSBW]

[youtube]fGna6CPDXDk[/youtube]

 

[Chalo]

The sound that car makes is magnificent.

As for unsprung weight, a prepared racetrack is not a very good place to determine its effect on vehicle dynamics. It's like assessing the value of steel tires based on their successful use in railcars.

 

[Doctorbass]

Some pictures from their FB page

Not too long anymore until the casing of VDL and the motor of AMK will be joined with the upright of NLR and the gears of Hankamp. Heading towards 20.000 RPM!

Doc

 

[cal3thousand]

Damn that was fast. Good for them!

They are building a track car for smooth surfaces, so the unsprung weight doesn't matter too much. It's when the suspension starts to move that unsprung weight changes vehicle dynamics.

 

[bearing]

Some pictures from their FB page

Doc

Is that front wheel motors?

I found the specs:
AMK DT5-14-10 4x
Weight 3.7 kg
Maximum power 27 KW
Maximum torque 25 Nm

Specs and pics here:
http://dutracing.tudelft.nl/cars/dut13/

The AMK DT5-14-10 is not listed on the AMK website though.
http://en.amk-antriebe.de/products_drive_and_control_technology_dt_high_torque_motors_tech.asp

 

[cal3thousand]

Some pictures from their FB page

Doc

Is that front wheel motors?

I found the specs:
AMK DT5-14-10 4x
Weight 3.7 kg
Maximum power 27 KW
Maximum torque 25 Nm

Specs and pics here:
http://dutracing.tudelft.nl/cars/dut13/

The AMK DT5-14-10 is not listed on the AMK website though.
http://en.amk-antriebe.de/products_drive_and_control_technology_dt_high_torque_motors_tech.asp

It has AWD with a motor in each

 

[bearing]

Found some more info about the motor.
[pre]AMK DT5-14-10 4x
D - DYNASYN three-phase motor
T - "High-torque motor" family of motors
5 - Size (3-10)
14 - Approx. continuous standstill torque in Nm
10 - Number of poles[/pre]

Controller is a servo drive called AMK KWS 26. The closest i found on AMK website is called AMK KW 20, and has 8kHz IGBT PWM, and max output frequency of 800Hz. Since the car info states that the motor revs to 20000 RPM and has 10 poles, the controller has to handle 1600Hz, so maybe 16kHz PWM then.

 

[LSBW]

Actual video:

[youtube]-eO_X0FNoqs[/youtube]

 

[BigOutrunner]

Found some more info about the motor.
[pre]AMK DT5-14-10 4x
D - DYNASYN three-phase motor
T - "High-torque motor" family of motors
5 - Size (3-10)
14 - Approx. continuous standstill torque in Nm
10 - Number of poles[/pre]

Controller is a servo drive called AMK KWS 26. The closest i found on AMK website is called AMK KW 20, and has 8kHz IGBT PWM, and max output frequency of 800Hz. Since the car info states that the motor revs to 20000 RPM and has 10 poles, the controller has to handle 1600Hz, so maybe 16kHz PWM then.

LOL! Paging MrDude_1 !!! Who said in another thread:

http://endless-sphere.com/forums/viewtopic.php?f=30&t=53520

As someone who judged SAE though, a 4hub motor layout is dumb on several engineering levels.

I think the DUT racing team might have just proved you 'technically biased'?

 

[Doctorbass]

These motor seem impressive as well. Here is their desing for liquid cooling. we clarely can see the path they made for the liquid on the outer sid eof the motor case. I guess they install a cylindrical cover on the top of that.

Electric motors are limited by their heat development; this will determine the power output of the motor. In order to maximize the power output, the heat development have to be minimized, this is done by water cooling, which is integrated with the motor casing.

Also the powertrain desing :

Calculations and estimations needed to be made in the amount of heat that needs to be dissipated from the car and the type of flow needed. In total 3800W will needed to be dissipated from the car.

The main components which produce heat and should be kept at a low temperature are the four motor controllers and the four motors. Since these components are essential to the car working, care was taken into keeping them at a proper temperature of around 40 degrees for each motor controller and 50 degrees for each motor. Much like in a regular car, cold water is run through piping in the car and pumped through a special water tight casing of each of the components. Naturally the water will heat up due to taking heat from the components and so must be cooled somewhere in the car. The solution is both simple and lightweight: a radiator. A radiator is a construction of metal with a small surface area but a large contact area with the surrounding air. Using small pipes the now hot water is passed through and cooled by the surrounding air. This allows the system to have a low power cost, by only needing to power pumps, while maintaining the needed temperatures.

Battery?

:

288 Lithium Polymer cells, of which 2 in parallel and 144 series give the DUT13 a battery pack which can deliver well over 85 kW of power, absorb 50 kW of regenerative power and stores 6.3 kWh of energy at a peak voltage of 600V. The total weight of the pack is 43 kg, divided over two compartments on either side of the driver, close to the centre of gravity.

 

[TwoWayStreet]

A student assembled EV with zero to 60 of 2.15 seconds and max of 80 plus.

Very impressive! I'd like to know about the battery used in that run.

 

[Arlo1]

Awesome. 0-60 in 2.13 has got to feel amazing!

 

[flathill]

Good for them but it is not the fastest in any category but the one they just made
It is not a production car

 

[Miles]

The team also eclipsed the quickest production car, the insanely lightweight, 500 horsepower Ariel Atom V8, which clocked a time of 2.3 seconds in 2010.

Ref: http://www.wired.com/autopia/2013/09/dut12/

 

[adrian_sm]

Awesome effort ! Would love to experience driving it..

They must have updated their power train design, because it no longer looks like they have the rear motors mounted at the wheel.

 

[Arlo1]

Good for them but it is not the fastest in any category but the one they just made
It is not a production car

No I think what they are saying is its the fastest 0-60 electric car and in comparison its faster then any production ICE powered car.

 

[teklektik]

Here's a bit of a build thread/timeline on this puppy. Takes a while to load the whole thing, but some interesting stuff....

 

[Punx0r]

Motors look nice. Someone needs to put one an a bicycle.

 

[flathill]

Good for them but it is not the fastest in any category but the one they just made
It is not a production car

No I think what they are saying is its the fastest 0-60 electric car and in comparison its faster then any production ICE powered car.

Plenty of electric drag cars hit 0-60 in under 2 seconds

Awesome display of awd traction control in any case

They are the fastest awd electric car in the world
Or maybe the are the fastest formula student car
My issue is with the way the wired article was written

What I want to see is 0-60 in an order of magnitude less time
They should shoot for under half second which is possible with conventional tire driven vehicles

 

[Chalo]

What I want to see is 0-60 in an order of magnitude less time
They should shoot for under 0.2 seconds which is possible with conventional tire driven vehicles

Do you want this for the intense discomfort, or the mortal danger to self and others? That's almost 14 G, which isn't something an intelligent person does on purpose. If whiplash doesn't get you, losing control of your vehicle and crashing will.

I guess there are a lot of practical benefits of this sort of thing, though. I mean... not. I guess I meant to say there are none.

 

[Arlo1]

Good for them but it is not the fastest in any category but the one they just made
It is not a production car

No I think what they are saying is its the fastest 0-60 electric car and in comparison its faster then any production ICE powered car.

Plenty of electric drag cars hit 0-60 in under 2 seconds

Awesome display of awd traction control in any case

They are the fastest awd electric car in the world
Or maybe the are the fastest formula student car
My issue is with the way the wired article was written

What I want to see is 0-60 in an order of magnitude less time
They should shoot for under half second which is possible with conventional tire driven vehicles

I dont know how plentiful they are but a quick google search shows white lighting at 1.8s 0-60

 

[BigOutrunner]

I dont know how plentiful they are but a quick google search shows white lighting at 1.8s 0-60[/quote]

That's exactly what the DUT Racing Team has to be congratulated for. 4WD (even in a 3 motor configuration) means there has to be torque vectoring and/or an E-diff control on the motors/wheels.

Comparing DUT's complex torque vectoring/e-diff configuration to a pure rear wheel drive raw power on the White Lightning would be a major disservice to DUT's technical prowess IMHO.

 

[flathill]

drag racing and racing in general is not a practical pursuit but the technology can spillover into daily drivers

Competition is fun as long as your are the winner

You do need a light driver to win though.....

only a select few experience super high g's outside of NASA/jets/rockets

Humans are inherently lazy which is why we invented wheels and levers in the first place
but we live for new experiences because life is easy now
We only make it hard on ourselves because pain mu pleasure