QS 3000w midmotor

Electric Motors and Controllers
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eee291   10 kW

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Re: QS 3000w midmotor

Post by eee291 » Dec 13 2018 6:29am

Bartosh wrote:
Dec 13 2018 4:49am
Thanks guys. I just thought it might be possible to remove the front pulley to get to the axle. So this way I could just get rid of the pulley and put a standard 420/428 sprocket. If the chain noise became too annoying, I would get back to the original setup. Seems like it's not gonna be possible without modifying the axle.
You can do it like this:
https://imgur.com/a/8X5Fq8R

You will have to buy a second pulley from QS if you want to go back.

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Skaiwerd   100 W

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Re: QS 3000w midmotor

Post by Skaiwerd » Dec 13 2018 12:11pm

eee291

Could you tell me if it’s normal threads or reverse? Clockwise to tighten is normal. I hate tightening (unknowingly) when I should be loosening, makes loosening that much harder. Is that center hole threaded, you show a nut, my pulley is secured with a bolt. Picture is distorted. It’s not really crooked like that.

Thanks
Attachments
16CB61AE-7C83-47C9-8DC8-559B9AF37666.jpeg

Bartosh   1 mW

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Re: QS 3000w midmotor

Post by Bartosh » Dec 13 2018 12:17pm

eee291, thanks a lot for these pictures. All clear now.

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eee291   10 kW

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Re: QS 3000w midmotor

Post by eee291 » Dec 13 2018 1:18pm

I believe you would call it a right-hand thread. Counterclockwise to open.
Your motor looks a bit different so I don't know how it works for your motor.

Bikebrap   1 W

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Re: QS 3000w midmotor

Post by Bikebrap » Dec 16 2018 4:36pm

what is real QS motor website ? I don't want to make a wrong payment

http://www.cnqsmotor.com/en/
http://www.qs-motor.com/
https://www.qsmotor.com/

Thanks

larsb   10 kW

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Re: QS 3000w midmotor

Post by larsb » Dec 16 2018 6:12pm

Its cnqsmotor
Ride on :D

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Emoto   10 kW

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Re: QS 3000w midmotor

Post by Emoto » Dec 27 2018 8:47am

Qs specs quote the 2000w motor at just under 8kg.. if any one has one and could weigh it id appreciate it.

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rlynd3   1 mW

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Re: QS 3000w midmotor

Post by rlynd3 » Jan 05 2019 3:59am

Currently working with QS sales to order just the QS 1000w 90 motor without the swing arm for my Drift Trike project. There is not a lot of information I could find on this motor unlike it's bigger cousins so I thought I'd share the info I received from the manufacturer...

1. The net weight of qs 90 1kW mid drive motor is approx. 5kg.
2. Suggest peak phase amperage could be 80-100a.
3. Max. no-load RPM at 72V with 1:5.3 reduction ration is 677.6RPM.
Test report.pdf
QS 1000w 90 Test Report
(93.23 KiB) Downloaded 79 times
4. Peak torque without reduction ration is 25.28n.m
5. The recommendation controller for qs 90 1kW mid drive motor is GB7280MF. It doesn't have regenerative braking function.

I have little to no information on the controller (other than guessing by the name it's 72v 80A) but because it doesn't support braking I'm planning to pair it with another controller. Thinking either the VOTOL EM-100 or a Kelly KLS6018S.

Does anyone have one of these? What do you drive it with?

Cheers!

Grantmac   1 kW

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Re: QS 3000w midmotor

Post by Grantmac » Jan 05 2019 1:19pm

The 1000w sounds similar to a 3000w Cyclone. You may look into one of those for similar cost.

kFox   100 µW

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Re: QS 3000w midmotor

Post by kFox » Jan 06 2019 5:42pm

Hello guys, I have this exact motor with the Votol 150 controller and I’m trying to get the right settings.
It’s build in a little car with weight of 280kg without 2 passengers so max weight is 430kg including passengers and battery.
I’m going for a max speed of 47km/h.
Long range is important.
Acceleration speed is not important, similar to a 50cc 4 stroke standard scooter is good.
Battery is 72v 100ah, capable of 410A output.
Currently my range is 80km, during 150 minutes, had not hills in test. This seems low to me and could be improved, what do you think?

I’ve got access to the controller and have been fiddling around with the settings. Some I understand but not all, below pics of the settings.
Phase current on settings page 1 is on 5000 (what does this number mean?
On page 2, all three speed % is set on 67% ) gave me top speed of 47km). Why are there 2 columns?
I have no idea what flux weakening does.

Image
Image
Image

I’m hoping for some help and advice, many thanks in advance!

larsb   10 kW

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Re: QS 3000w midmotor

Post by larsb » Jan 07 2019 1:37am

You're mostly offtopic in this thread, you should ask here:
https://endless-sphere.com/forums/viewt ... =7&t=95969

I'll answer you there if you post the same question. There's a link to the manual in the Votol controller thread
Ride on :D

markz   100 GW

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Re: QS 3000w midmotor

Post by markz » Jan 07 2019 8:13pm

ASI is so freakin' expensive, yeah they sure look nice but I am not sure what the programming level needs to be of the user.
RS-232 would be a moon landing for me.

larsb wrote:
Oct 20 2018 11:27am
You should've invested in the ASI controller :D

(And learned and told us how to program it for the QS motor :D :D )

kFox   100 µW

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Re: QS 3000w midmotor

Post by kFox » Jan 26 2019 1:12pm

We did a power test today with this 3000W mid-drive QS and the standard Votol controller.
For those curious, set a:
Bushbar max 120A
Phase current at 9960
Voltage 72
Speed percentages all at 100%
All parts standard
12 inch wheel

We got max of 81km/h
And 8,6kw

Lamonz88   1 µW

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Re: QS 3000w midmotor

Post by Lamonz88 » Jan 26 2019 1:47pm

larsb wrote:
Jul 25 2018 8:46am
QS are not wanting to do a custom axle following my request.

The axle for the QS 2kw and 3kw mid drive motor is the same according to carrie at QS.

It's a tapered shaft from approximately dia 16mm to dia 24mm in 20mm with a metric woodruff key (5x6.5x16).

I can't seem to find sprockets for this. Anyone know a source and if it's a standard interface?

Darwing mid drive motor 120 2000W.pdf
image.png
image.png

I think i've found something really good. There is company here in UK , they make custom pulleys .. Hope this helps ..!
https://www.beltingonline.com/can-t-fin ... ndard-7551

larsb   10 kW

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Re: QS 3000w midmotor

Post by larsb » Jan 26 2019 2:15pm

I've had contact with beltingonline for a custom pulley.

It's probably better from here, they were quicker to respond and cheaper:
www.zahnriemen24.de

I bought a pulley with custom bore from them some time ago.

I guess if you're based in the UK then shipping might be a little more expensive for this option.
Ride on :D

Stevebequik   10 µW

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Re: QS 3000w midmotor

Post by Stevebequik » Mar 18 2019 8:52pm

Thread has gone quiet.
About to order the 3000w.
Those that are pulling big power thru these, any update on longevity and heat issues?
Anyone else using?
Thanks

larsb   10 kW

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Re: QS 3000w midmotor

Post by larsb » Mar 19 2019 12:46am

I have not so much to say other that i'm thinking of buying the smaller 1000w or 2000w also!

It's not had any issues yet even though i ride at 300A, but i run on road. If you buy one then ask them to install a temp sensor in the motor. I think this is worth it since the temperature is impossible to guess or evaluate without it (I have not even gotten my motor more than hand warm on the outside but there should be heating in the winding).
Ride on :D

AviatorTrainman   10 mW

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Re: QS 3000w midmotor

Post by AviatorTrainman » Mar 19 2019 12:26pm

larsb wrote:
Mar 19 2019 12:46am
It's not had any issues yet even though i ride at 300A, but i run on road.
Is that 300 Amps battery current? How long do you typically sustain that?

larsb   10 kW

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Re: QS 3000w midmotor

Post by larsb » Mar 19 2019 1:20pm

I have to correct myself, I run 600A phase, 200A battery@72V. I don't sustain it for long, only for drag races and such, it doesn't take that kind of energy to go full speed.

-->i can not vouch for the long term capability of the motor, i mean 3000w is obviously a ridiculously low rating by QS and i have yet to make the motor warm on the outside. I wish my dyno was built already, then i'd know better :D
Ride on :D

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DanGT86   10 kW

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Re: QS 3000w midmotor

Post by DanGT86 » Apr 01 2019 9:21am

What is the belt profile for the pulley that comes on this motor? Is it something common like 8mm Gates GT? They are offering it with a splined output shaft for motorcycle sprockets as well? Does anyone happen to know if these are common spline sizes that would be interchangable with common dirt bike sprockets like honda/yamaha etc?

I'm seriously considering this motor for a Honda CR125 MX bike conversion. They are cheap enough to possibly run 2 of them if the power isn't enough. I'm reluctant to get into the world of ME or zero motors with sin/cos encoders and sevcon programming. The fact that these are the simple hall sensor tech I'm used to dealing with and can be driven with cheap giant ebike controllers if need be is a big plus for me.

larsb   10 kW

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Re: QS 3000w midmotor

Post by larsb » Apr 01 2019 10:54am

It's a common 8m profile belt. It says gt3 on the drawing for the 2000w motor (has the same interface) but i can see on the rear pulley that it's not. I use a HTD type belt.

If you want a custom sprocket then you could just bolt it to the original one without issues, QS has 11-15t 428 sprockets to match the motor.

Cheers
Ride on :D

evolutiongts   10 kW

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Re: QS 3000w midmotor

Post by evolutiongts » Apr 05 2019 4:17pm

Got this QS 3000W mid drive running on the bench, sounds great and very torquey response.



http://www.electricrt.com
Electric Race Technologies

Schwinn 405 2WD Track Bike 18KW
EDGE 1500W Hub / MXUS 3K Turbo
ASI BAC 2000 / BAC 4000 Bluetooth
viewtopic.php?f=6&t=93079

10Kw KMX death trike
MUXUS 3K Turbo
Sabvoton 72V150A
Moto Wheels all around
Front Suspension Kit
viewtopic.php?f=6&t=83423

Giant Trance 4 Full Suspension
Cyclone 3000W
74V 3000W
http://endless-sphere.com/forums/viewto ... =6&t=59005

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eee291   10 kW

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Re: QS 3000w midmotor

Post by eee291 » Apr 05 2019 4:27pm

Yours looks a bit different from the one I have, whats the weight of the Motor?

evolutiongts   10 kW

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Re: QS 3000w midmotor

Post by evolutiongts » Apr 05 2019 4:37pm

8.61kg
http://www.electricrt.com
Electric Race Technologies

Schwinn 405 2WD Track Bike 18KW
EDGE 1500W Hub / MXUS 3K Turbo
ASI BAC 2000 / BAC 4000 Bluetooth
viewtopic.php?f=6&t=93079

10Kw KMX death trike
MUXUS 3K Turbo
Sabvoton 72V150A
Moto Wheels all around
Front Suspension Kit
viewtopic.php?f=6&t=83423

Giant Trance 4 Full Suspension
Cyclone 3000W
74V 3000W
http://endless-sphere.com/forums/viewto ... =6&t=59005

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eee291   10 kW

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Re: QS 3000w midmotor

Post by eee291 » Apr 05 2019 4:54pm

Mine weighs about 10.5Kg hmm...

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