QSMOTOR,0.5-12kW Electric Hub Motor & Mid Drive Motor Manufacture China

[QSMOTOR]

Feedback of my experience with Vito about buying a motor for my build. Vito has been super cooperative and patient with me while I bombarded him with questions, he really knows a lot about all that QS Motor has to offer and gave me tons of good advice to finally direct me to a motor which will be the perfect match for my requirements.

Thank you Vito.
Ray

Hello Ray,

Thank you very much for your positive comment, I always try my best for you & other customers.
I am glad at your service. : )

Best Wishes

 

[QSMOTOR]

Dear All,

Not available.

 

[QSMOTOR]

Hello again,

I think it's the right time to share my personal calculation of EV's performance for Hub Motor Driven (max speed & climb angle mainly).
The calculation could also be applied for electric bike, electric scooter & electric tricycle.
As long as we know the EV cross sectional area (A), Windage Resistance Factor (Cw).
PS. The calculation might be a little different with real test, so it's for reference only.
And there maybe some mistake, please leave a message so that I could improve the calculation accordingly.

It's calculated base on the force analysis, refer to below pic.

When it's on ground,
Resistance: Rolling resistance (Fr), Windage resistance (Fw)
Traction: Powered by Motor(Ft)
Fr=Fr=M*g*0.013, asssum Friction factors 0.013
Fw=1/2*ρ*A*Cw*V², ρ @ 20°C=1.205kg/m3, assum there in no winding speed in the air.
Ft = Fr + Fw, when the ev is an even max speed    
T=Ft * r, r is Tyre radius ®
RPM=V*1000/60/2rπ
Power=Torque*RPS*60/9.55=Torque*RPS*3.14*2
By comparing the performance curve of motor, we could find out the right RPM & Torque.
To check the speed one by one, then we will find out the the max speed.

When it climbs,
Resistance: Rolling resistance (Fr), Windage resistance (Fw'), Inclined resistance (Fc)
Traction: Powered by Motor(Ft')
Fr=M*g*0.013*(cos a)
Fw'=1/2*ρ*A*Cw*V²
Fc=M*g*(sin a), max climbing angle a
Ft' = Fc + Fr + Fw', when the ev is an even speed (e.g. 10KPH).
By comparing the performance curve of motor, we could find out the right RPM’ & Torque‘.
To check the climb angle one by one, then we will find out the the max angle.

That's all, thank you for reading.

Best Regards

 

[John in CR]

698kg Wow! What do the motor/wheel/brake assemblies weigh, 50kg/ea or more I'd think? That's 200kg plus another 200kg or more for 20kwh of Lifepo4 and it's container. That leave less than 300kg for a car frame, body, suspension, seats, glass, bumpers, etc, which seems overly optimistic. I hope it's true though, because that means I can copy much of it, and still save significantly more weight.

Can you show us the details about the bearings used in those QS car hubmotors? That's the solution I've been waiting for from you motor manufacturers, since the side loads are totally different compared to the near zero side loads on our ebike and emoto hubbies.

John

 

[QSMOTOR]

698kg Wow! What do the motor/wheel/brake assemblies weigh, 50kg/ea or more I'd think? That's 200kg plus another 200kg or more for 20kwh of Lifepo4 and it's container. That leave less than 300kg for a car frame, body, suspension, seats, glass, bumpers, etc, which seems overly optimistic. I hope it's true though, because that means I can copy much of it, and still save significantly more weight.

Can you show us the details about the bearings used in those QS car hubmotors? That's the solution I've been waiting for from you motor manufacturers, since the side loads are totally different compared to the near zero side loads on our ebike and emoto hubbies.

John

Not available.

Best Regards

 

[QSMOTOR]

QS 12" Electric Scooter Hub Motor
12inch 205 E-scooter Motor 12x2.15" 12x3.5" 500W-3000W
12inch 260 E-scooter Motor 12x2.15" 12X3.0" 12x3.5" 2000W-3000W
12inch 260 E-scooter Motor 12"X3.5" 5000W

Link on Alibaba.
http://qsmotor.en.alibaba.com/productgrouplist-801598340/12inch_Motor_500W_5000W.html
View attachment 9

Applications

View attachment 5View attachment 4View attachment 3

 

[John in CR]

The motor itself is slightly less than I thought, but for the 50kg I'm talking about the entire wheel assembly...rim, tire, brake and brake disc etc. I hope the whole car does come in at that low weight, because to me light vehicles is the future, which will require smart suspensions to adjust for the load. It's the suspension issues that prevent me from an attempt at an electric car. Plus my ebike has such incredible speed and performance that it will be tough to give up.

 

[QSMOTOR]

The motor itself is slightly less than I thought, but for the 50kg I'm talking about the entire wheel assembly...rim, tire, brake and brake disc etc. I hope the whole car does come in at that low weight, because to me light vehicles is the future, which will require smart suspensions to adjust for the load. It's the suspension issues that prevent me from an attempt at an electric car. Plus my ebike has such incredible speed and performance that it will be tough to give up.

Hello John,

Not avaiable.

Best Regards

 

[Kodin]

Magna, you ever get this sorted? I have an SSC048150 I have yet to power up, however I do have pictures and a correct cable loom. I should probably plug the thing in and see that it powers up...

Regards,
-Kodin-

 

[Kodin]

Cherry, I noticed your aliexpress site no longer lists the Sabvoton SSC units. Have you stopped selling them?

 

[cwah]

Are all sabot on controller the same size and weight??

 

[Kodin]

As far as I can tell, yes for the SSC models. In fact, as far as I've seen, the 48V/150A model is the same as the 72V/150A with different settings as default. The older style ones may be a slightly different size or weight.

 

[cwah]

Yeah but I'm surprised it's the same weight and size for 60A or 150A!

 

[Kodin]

99% sure it's the same layout, though it might be possible they don't stick as many FET's in the lower-current models; honestly that doesn't make sense from a mass-production perspective; far simpler to make one unit and program it with whatever settings your customers want.

 

[DasDouble]

Does someone know what is up with QS Motors??? I want to buy some things and asked for the price for a QS 205 3000W V3 (50H) Motor, laced and spoked in a 17" motorcycle wheel, a 19" motorcycle front wheel ready to ride, and a freewheel + shipping to germany but I get just not a single response...

 

[SlowCo]

Have you emailed Vito directly?
His contact info is in his signature under the first post on page 1 of this thread.

 

[DasDouble]

Have you emailed Vito directly?
His contact info is in his signature under the first post on page 1 of this thread.

I will do that right now. Thanks

 

[QSMOTOR]

Have you emailed Vito directly?
His contact info is in his signature under the first post on page 1 of this thread.

I will do that right now. Thanks

Thank you for your email.
We're a litte bit busy, I will ask Damon to get back to you asap.

Best Regards

 

[John in CR]

Hi Vito,

I looked through the online motor info and see the pole counts, but I am looking for the stator slot counts of the newest 260 and 273 motors. I traded a bunch of emails with Cherry 2 years ago when they were still in development, but I forgot to save the email with that info for the 273's.

 

[QSMOTOR]

Hi Vito,

I looked through the online motor info and see the pole counts, but I am looking for the stator slot counts of the newest 260 and 273 motors. I traded a bunch of emails with Cherry 2 years ago when they were still in development, but I forgot to save the email with that info for the 273's.

Thank you for your comment.
Please contact with Cherry Directly, email: cherry@tzquanshun.com, thank you!

Best Regards

 

[John in CR]

Hi Vito,

I looked through the online motor info and see the pole counts, but I am looking for the stator slot counts of the newest 260 and 273 motors. I traded a bunch of emails with Cherry 2 years ago when they were still in development, but I forgot to save the email with that info for the 273's.

Thank you for your comment.
Please contact with Cherry Directly, email: cherry@tzquanshun.com, thank you!

Best Regards

Can't you tell us all the slot (stator tooth count) of all the V3 motors that have the new lower pole count?

 

[QSMOTOR]

Can't you tell us all the slot (stator tooth count) of all the V3 motors that have the new lower pole count?

Yes, for 205 & 273 V3 motor, it's 36 slot.
For more information, Cherry will get back to you by pm or email.
If any question, please feel free to contact with us.

Best Regards

 

[QSMOTOR]

Hi Vito,

I looked through the online motor info and see the pole counts, but I am looking for the stator slot counts of the newest 260 and 273 motors. I traded a bunch of emails with Cherry 2 years ago when they were still in development, but I forgot to save the email with that info for the 273's.

Thank you for your comment.
Please contact with Cherry Directly, email: cherry@tzquanshun.com, thank you!

Best Regards

Can't you tell us all the slot (stator tooth count) of all the V3 motors that have the new lower pole count?

Hi Johan,
This is Cherry.

Yes, like Vito reply you, the slot for 205 and 273 V3 motor, it's 36pcs slot, for 260 type, we don't sale it currently. Anyhow, will keep you informed once we start to mass produced it.

cherry@tzquanshun.com

 

[Mammalian04]

Hi QS,

I would also like to order a wheel set combo.
Can you do the following?

Front: 19x1.4 Moto Wheel - 4 Cross
Rear: 17x1.6 - 2 Cross
Motor: 205 50H V3 5T - English thread - with temperature sensor option and freewheel option

Could you send me a quote shipping to Austin, Texas?

Are there any other options I should consider?

 

[DasDouble]

Hello Cherry,

I have a send you an email for these things:

"......I am interested in buying a 205 3000W V3 (50H) hub motor already laced and spoked in a 17" motorcycle wheel + 1 freewheel, and a complete 19" motorcycle front wheel set ready to ride. ...."

-Best regards,

Elias