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Dyno for EU testing


Joff

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I am wondering if anyone has a device for measuring the actual power and torque output at the wheel. Seems like it would be an easier thing to make than an electric unicycle. 

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14 hours ago, Joff said:

I am wondering if anyone has a device for measuring the actual power and torque output at the wheel. Seems like it would be an easier thing to make than an electric unicycle. 

 

5 hours ago, Hunka Hunka Burning Love said:

@EcoDrift has a dyno testing rig that they used to check out a few wheels.  Them Ruskies are always a few steps ahead of the game.  ;)

Also e-wheels.de ?once had?/has a dyno for testing.

@EcoDrift stated in the russian forum that new Kingsongs cannot be tested anymore on a dyno (unfortionately without explaining the reason) and something like new EUCs are strong enough so he won't make any further tests... ?

https://electrotransport.ru/ussr/index.php?msg=1224593

Edited by Chriull
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Car dyno!  I was picturing something a lot smaller that  could be made economically for the more modest power of a EU. Like a wheel with a pulley that turns a modified alternator to provide an adjustable load. I was also surprised the dyno was only being used to test stock EUs. I  figured there must be people out there making modifications that want want to see measurable results. 

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  • 2 years later...

We might be able to beef up a little something like the dyno made here .. DIY Dyno 800-1500 watt motor .. they spent less than $400 in materials.

Or

for $3500 they make a go-kart scale sub 20hp dyno ... https://www.mittlerbros.com/Chassis-Dyno .. no EUC would need more than 20hp dyno.

or

does anybody live in an area with allot of go-kart racing / riding ??

find someone who already bought the go-kart dyno .. maybe just pay to do the test itself .. just like only pay to test on a car , don't have to build or buy the whole dyno.

 

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  • 3 years later...

I wanted to build EUC dyno myself - But I didnt have enough space in my flat to have it there all the time. It is still interesting project to do.
There are few thing to think about:

- Cost / final size of rig

- How to properly mount and secure EUC 

- Breaking / resistance capability. How to get properly variable load to simulate ride. 

- Where heat goes and how to measure calibrate it to get usable result



I think there are two cost effective options to explore:

- Using another HUB motor with VESC like break and measure data through VESC interface. I got Superflux for this purpose(It is wider than most EUC tyres). Laying unused since i don't ride OW much. 

- Using one or two truck Alternators - producing DC and Measure power out. 

If somebody want me to build him DYNO rig, for EUC I am up to task :D

Edited by daniel1234
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  • 2 weeks later...

Inmo disclosed some images of their production test dyno... but it seems to only make a constant drag, and doesn't stress the EUC very much.

  

On 10/31/2023 at 11:56 AM, Jason McNeil said:

Jack just got back from the Inmotion assembly facility today, with a bunch of pics/videos... 
- All V11Ys were dyno tested using a constant 30Nm of resistance

  IMG_3252-600x1066.jpg   

IMG_3238-800x450.jpg

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