BLDC Permanent Magnet Outer Rotor Direct Drive Hub Motor
Silver & Black
DIY, Two Halls, High-Efficiency
Watercooled or Olicooled
Packaging & Delivery
Single package size:
Single gross weight:
INNER: QS STANDARD EPS+CARTON OUTER: WOODEN BOX
High Torque 17 X 4.5inch 12kW - 14kW 273 brushless DC water cooled electric In wheel hub motor for motorcycle
Many Customers ask us for the 14kW, 12kW Motor, as the old mould is opened for another customer (the cost is very expensive).
Now, the new 17"X4.5" mould is ready, it could be 12kW 273 70H, and 14kW 273 80H.
The mould is made for water cooled version. It could also be customized to be air cooled.
Please note the wheel, two side covers, stator are all new mould, not made by hand.
So this is the most poweful QS Motor hub motor, ready for mass production.
It could be 12000W 70H V3 Water cooled & Air Cooled, 14000W 80H V3 Water Cooled & Air Cooled.
Production Period: 30-40 business days.
QS Motor Specification
PS. Minmum Dropout 280mm.
For 14.5kV, the winding is 3 X (28X6T) in parallel, equal to 17.13mm² per turn. Phase Wire, to be determined.
How to find suitable hub motor
To customized a suitable motor, could you pls. inform below points:
1.E-scooter, E-tricycle or E-car, tire model?
2.Volt and wattage of motor, Speed(kV), and torque/climb angle ?
3.Your vehicle weight and loading weight?
4.Lithium or lead-acid Battery?
We could suggest most suitable motor accordingly, thank you for your cooperation.
PS. To calculate the speed, v(km/h)=n(r/min)*2rπ(m)*60/1000, n=load RPM, r=tire radius.
For speed less than 100KPH, consider the Windage Resistance & Rolling resistance.
the load RPM is appr 0.9 * no-load RPM. v(km/h)=0.9*n(r/min)*2rπ(m)*60/1000
For over 100KPH, V=0.85*RPM*2rπ*60/1000
Electric Motor Kits
After confirming the motor, we could try to offer suitable motor kits, e.g. controller, charger, speedometer,
throttle, brake, DC-DC converter, etc.
PS. So far, the battery is not avaiable.
QS Motor V1/V2/V3 Type Motor
There are three types, Normal/V1 type (low cost), Export/V2 type (Cost-effective) and Extra/V3 type (Best Performance).
1. Difference between V1 & V2
Holder: Iron(V1), Aluminum (V2)
Hall: One hall with Normal connector(V1), Two halls with Waterproof connector(V2)
Stator: V2 have a stronger configuration, more cooper, thicker section surface, energy saving in usage.
Magnetic Steel Grade: V2 ≥ V1
Efficiency: 84~87%(V1) 86~88%(V2)
In short, normal type is standard configuration, while export type is high configuration.The price differs because of the cost of raw materials.
2. Difference between V2 & V3
The raw materials are alike, main difference in inner construction.
For V3 (16 Pole Pairs): stronger configuration than V2, wider lamination, more cooper wire /thicker Cross-sectional area section, bear more current in usage. Higher torque at same current, lower temperature rise, more stable in high current. Magentic Steel: V3 is wider and thicker. Efficiency: 86~88%(V2) 88~92%(V3); Thus, V3 have best performance.
More QS Motor Informaiton:
Motor Details, drawing, performance curve (refer to attachment in PDF).
For more information, please feel free to contact with us.
17X4.5inch 12kW 273 70H Water Cooled Hub Motor (Silver)
17X4.5inch 14kW 273 80H Air Cooled Hub Motor (Black)
For samples, "QSMOTOR" logo is laser print on side cover as default.
Meanwhile, the logo could be customized with below essential document.
· Please provide high definition logo in jpg format.
· Brand Letter of Authorization.
· Certificate of Trademark Registration
· Please advise the position & Size of your logo on side cover.
QS Motor Steel Seal We could laser print it on side cover or edge of side cover. For V3 type motors(e.g. WP20040X140607 7355) WP= V3 type 200=2000W, 300=3000W 40 means winding X means 32 pieces magnetic steel 140607 means producting date, 07th, June, 2014. 7355, is producing serial number
For V2 type motors(e.g. QSMOTOR 48V3000W 140720 604329) 48V3000W=48V 3000W 140720 means producing date, 20th, July, 2014. 60 means rated speed, 60km/h. 4329 is producing serial number. P.S.: We define power base on rated output power, rather than peak output power.
How to make the order
·Before-sale, please advise which motor do you prefer, and advise above expected configuration of EV if possible.
After confirming motor, we could also advise suitable motor kits (e.g. controller).
It could be paid online, e.g. QS Motor Shop on alibaba, aliexpress;
We suggest to make the deal offline, we will make PI accordingly (latest price & accurate delivery cost).
·In-sale, we will informe you once received the payment to start the order & ETD.
Before delivery, we will send some pictures for reference.
·After-sale, Once got the tracking number, will informed you immediately.
Manual and software will be sent accordingly, also we will email you after the package delivered.
Wire Transfer/TT, Money Gram,Western Union, Paypal 100% in advance(for sample) Generally, we perefer T/T, Money Gram,Western Union 100% in advance (for sample). Meanwhile, we could also accpet paypal. There will be extra cost for transaction fee: Total cost*4.4%+0.3
Withdraw fee: USD 35.0 (We could bear USD 35.0). For Mass Production, we support 30% T/T in advance + 70% T/T the balance before shipment.
Package Standard export packing 1. polyfoam + carton box (for sample) 2. Or according to customer's requirements
Life Time of QS Motor & Warranty of Sample The Life Time of motor depends on usage. For general usage, it's about 3-5 years, and it could be 5-7 years if it work in good condition. For testing and abusing usage, the lifetime will decrease accordingly. E.g., For 3kW V2/V3 motor, the peak power could be 6kW (2 times of rated power). Situation 1: We suggest peak 70-80A battery current for general usage (72V). It's most stable configuration & longest life time. Some EV enthusiast adjust it to be 150A, the output power is far more than 6kW peak. QS Motor could also work,
which might not as stable as former situation. For a long time in high current/power, the motor might over heat & even burnt.
We strongly suggest to install Thermic Probe (e.g. KTY 83/122), so that controller will protect motor due to the temp inside of motor. Situation 2: The peak speed of 1pc 3kW motor is 80KPH in 72V(for e-scooter). Some EV enthusiast adjust it to be 96V, the max speed might be 100KPH, the continuous output power is far more than 3kW rated (maybe equal to 5-6kW).
QS Motor could also work, which might not as stable as it in 72V. We call it over voltage/abusing usage, the life time might be shorter, and V3 will work better than V2.
For Sample, If it's destructive test/abusing usage due to test purpose, we could not do aftersale issue for free.
If there is some damage during your test, which we could repair. After checking your video or pictures, we could deliver some motor parts (e.g. hall sensor) for maintenance. Also, you could deliver them back to our factory(I'm afraid that you have to bear delivery fee, both way), We will make maintenance as possible as we could. For repair fee, we could bear the cost for 1 year.
Disc plate and rear brake system could be offered, the price below for your reference.