QS 3000w midmotor

Electric Motors and Controllers
larsb   1 MW

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Re: QS 3000w midmotor

Post by larsb » Feb 22 2020 3:24pm

I’ve done 110km/h on the votol em150 qs3000w combination. Shouldn’t you get even higher speed?
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Re: QS 3000w midmotor

Post by SilverLine » Feb 22 2020 3:46pm

larsb wrote:
Feb 22 2020 3:24pm
I’ve done 110km/h on the votol em150 qs3000w combination. Shouldn’t you get even higher speed?
The battery pack I am using right now (20s2p spim08hp) goes pretty fast to 66v when i´m pushing it, and stays there for long time, but I think that it take down some topspeed. I´m in the making of building a new pack out of 21700 p42a Molicels based on the NESE system... They hold voltage much better.

john61ct   1.21 GW

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Re: QS 3000w midmotor

Post by john61ct » Feb 22 2020 3:59pm

Sorry which specific # model is the topic of this thread?

I find just using the supposed watts rating to be confusing.

Besides QS website, is there a resource with a summary listing of the variois QS motors, and their most-relevant minimal specs?

larsb   1 MW

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Re: QS 3000w midmotor

Post by larsb » Feb 22 2020 4:09pm

It’s QS 138 70h 3000w mid drive.
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Overclocker   10 kW

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Re: QS 3000w midmotor

Post by Overclocker » Feb 22 2020 9:05pm

i'm trying to save some $$$ by using either of these 2 controllers i have lying around:

1) kelly KLS7230

2) yuyangking YKZ7280

any thoughts on using those? the #2 is a square-wave controller if that's an issue at all...

these IPM motors are more picky w/ controllers, right?

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Re: QS 3000w midmotor

Post by crf150rb » Feb 22 2020 10:18pm

Hey Im new to this, just purchased a 3000w motor and esc combo from qsmotor for an electric pit bike build is there anything to know? Thanks.

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Re: QS 3000w midmotor

Post by amberwolf » Feb 22 2020 11:00pm

crf150rb wrote:
Feb 22 2020 10:18pm
Hey Im new to this, just purchased a 3000w motor and esc combo from qsmotor for an electric pit bike build is there anything to know? Thanks.
you'll have to list everything you already know for us to know if there's anything left to tell you.

crf150rb   1 mW

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Re: QS 3000w midmotor

Post by crf150rb » Feb 22 2020 11:08pm

I know basic electronics and machine work. mainly concerned about having to program the esc and securely mounting stuff.

john61ct   1.21 GW

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Re: QS 3000w midmotor

Post by john61ct » Feb 22 2020 11:37pm

larsb wrote:It’s QS 138 70h 3000w mid drive.
Which I noted you run at up to 20kW right? So what is max peak phase amps?

And which controllers get that level of power out of it?

Any of them true FOC? conducive to keeping multiple motors in sync?

ideally with variable regen?

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PITMIX   100 W

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Re: QS 3000w midmotor

Post by PITMIX » Feb 23 2020 3:13am

Hello I use this engine with a Nucular 24F. The motor is 20kW with 500A phase and 300A battery. It does not heat up. I noted 31 ° C in intense use with 15 ° C outside. QS recommends 470A phases.
Aixam 550 Twin retrophite Qs 138 70H, Thermo-Nucular electronics 24F, LG Chem 20s 60Ah

larsb   1 MW

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Re: QS 3000w midmotor

Post by larsb » Feb 23 2020 7:11am

Has someone burnt one of these motors yet? I don’t think so. Where is LFP when we need him..
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Re: QS 3000w midmotor

Post by john61ct » Feb 23 2020 12:11pm

Is there any downside to using a much bigger controller than what is required to max out a given small motor?

Other than cost size weight of course.

And assuming you have good protective limits, set appropriately low for the motor.

Wh per km efficiency better, worse, about the same?

larsb   1 MW

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Re: QS 3000w midmotor

Post by larsb » Feb 23 2020 1:35pm

More fets, less resistance losses, lower temperature in the controller and mean time between failure is exponentially proportional to lowered temperature.

It’s sound to overspec the controller :D
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flippy   1 MW

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Re: QS 3000w midmotor

Post by flippy » Feb 25 2020 3:32am

john61ct wrote:
Feb 23 2020 12:11pm
Is there any downside to using a much bigger controller than what is required to max out a given small motor?

Other than cost size weight of course.

And assuming you have good protective limits, set appropriately low for the motor.

Wh per km efficiency better, worse, about the same?
bigger means better/more fets wich means lower IR wich means more efficinecy. usually higher tier ones can switch more accuratly/faster dus to better parts so they are a bit more effcient in general.

especially chinese controllers you need to keep below 75% or so of full power in order to keep the efficiency acceptable. industrial stuff like sevcon you can go crazy as they are made with the best parts money can buy and designed by really expensive enginerds.
Lithium beats liquid dinosaurs.

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macribs   1.21 GW

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Re: QS 3000w midmotor

Post by macribs » Feb 25 2020 3:49pm

*enginerds*

That made my day. What a beautiful word. And so wonderfully descriptive.

larsb   1 MW

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Re: QS 3000w midmotor

Post by larsb » Feb 25 2020 3:51pm

Even better when you’ve got the expensive enginerds :mrgreen:
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flippy   1 MW

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Re: QS 3000w midmotor

Post by flippy » Feb 26 2020 3:05am

macribs wrote:
Feb 25 2020 3:49pm
*enginerds*
That made my day. What a beautiful word. And so wonderfully descriptive.
guess what elechicken means then... :mrgreen:
Lithium beats liquid dinosaurs.

Torti   1 W

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Re: QS 3000w midmotor

Post by Torti » Feb 26 2020 12:38pm

does the 138 motor have a temperature sensor?

SilverLine   100 W

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Re: QS 3000w midmotor

Post by SilverLine » Feb 26 2020 12:42pm

Torti wrote:
Feb 26 2020 12:38pm
does the 138 motor have a temperature sensor?
Nope... not by default.... Maybe in the future...

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eee291   100 kW

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Re: QS 3000w midmotor

Post by eee291 » Feb 26 2020 1:26pm

Mine didn't have one either, I think it's an option though so just tell them before ordering.

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PITMIX   100 W

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Re: QS 3000w midmotor

Post by PITMIX » Feb 26 2020 1:51pm

Torti Look at the 18 page, it's very easy to install. It is necessary to dismantle the flange at the front of the motor and pass the probe through the electrical box with the motor phases.
Aixam 550 Twin retrophite Qs 138 70H, Thermo-Nucular electronics 24F, LG Chem 20s 60Ah

Torti   1 W

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Re: QS 3000w midmotor

Post by Torti » Mar 01 2020 4:13am

how many motor poles does the qs 138 have?

and does anyone know what needs to be set on the kelly controller?

pole pairs or the individual poles.

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PITMIX   100 W

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Re: QS 3000w midmotor

Post by PITMIX » Mar 01 2020 4:32am

5 poles
Aixam 550 Twin retrophite Qs 138 70H, Thermo-Nucular electronics 24F, LG Chem 20s 60Ah

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flippy   1 MW

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Re: QS 3000w midmotor

Post by flippy » Mar 01 2020 5:32am

Torti wrote:
Feb 26 2020 12:38pm
does the 138 motor have a temperature sensor?
its a option when ordering. als mention the type of sensor.
Torti wrote:
Mar 01 2020 4:13am
how many motor poles does the qs 138 have?
and does anyone know what needs to be set on the kelly controller?
pole pairs or the individual poles.
for a kelly it generally does not matter what you enter, its just for getting the right rpm to register in the controller so you can set the right rpm limits for speed control.
Lithium beats liquid dinosaurs.

flat tire   1 MW

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Re: QS 3000w midmotor

Post by flat tire » Mar 09 2020 6:47pm

Has anyone run this with ASI successfully?

How many RPM can it take before failure?

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