QS 120 2kW 72V60KPH Mid drive motor for belt type

Share on:

Price in USD:Details


Product Overview


QS 120 2kW 72V60KPH Mid drive motor with belt driven


Product Description

For 1202000W mid drive motor kit assembly, it could be used for electric scooter, electric motorcycle.

It could be 72V 60KPH.

It can be designed as belt driven( default )and sprocket design( Customized ).



 01 (2).png

Key Features


1). Simplify to make a electric-motorcycle. Gearbox, transmission shaft, clutch are no need. Which save space.

2). It could be installed in the rear to save more space for battery.

3). Support regenerative braking

4). High efficiency: 85~92%


Product description


Genearlly Spec:


  1. Item: QS Motor 2000W 120 70H Mid Drive Motor

  2. Motor Type:BLDC Permanent Magnet Inner Rotor Motor With Hall Sensor

  3. Brand: QS Motor, QSMOTOR

  4. Motor Design: Single axle

  5. Matched Wheel: 12inch Wheel (as default)

  6. Magnet Height: 70mm,40pcs,5pole pairs

  7. Diameter of stator: 120mm

  8. Rated Power: 2000W

  9. Rated Voltage: 72V as default

  10. Speed: 60KPH

  11. No-load rpm: 2800rpm without flux weakening, 4400RPM with flux weakening.

  12. Max Torque: approx 45.4N.m without Reduction ratio, approx 216.7N.m with 1:4.77 Reduction ratio

  13. Reduction ratio: 1:4.77 (as default)

  14. Max Efficiency: 88%

  15. Continuous Battery Current: pending (72V)

  16. Peak Battery Current: 60A (72V)

  17. Suggest Peak Phase Current: 250A

  18. Thermic Probe:None as default (KTY83/122 is available, if you need, please let sales man know).

  19. Working Temperature: Pending

  20. Single Hall Plate with waterproof connectors

  21. 8mm² Cross Section of Phase Wire (not include insulation layer)

  22. Hall Sensor Phasing angle: 120 degree

  23. Waterproof Grade: IP54

  24. Color: Black

  25. N.W./G.W.: 10.8kgs/11.5kgs

  26. Package Dimension: 34cm*34cm*33cm

  27. Axle matched with belt as default


P.S.: For 2kW 138 old mid drive motor, it can be designed to match with 428 sprocket, teeth optional.(12T, 13T, 14T(as default).

If you want to buy such mid drive motor, please kindly click below picture.




Dimension Drawing:


  • QS 2kW 120 mid drive motor(old appearance, belt driven)




Please noted:


Optional appearance, drawing, performance curve/test report are available.

If you need more technical information, please feel free to contact us.

We will give you reply in 12hours.


For 2kW belt driven mid drive motor, there has matched assemble kits.




Matched controller recommendation:


  • Item: EM100SP sine wave controller

  • Net weight: 1650g

  • Rated current: 100A

  • Boost current: 130A

  • Peak current: 330A

  • Max. Power: 7200W

  • Flux Weaking Ratio: 100~250%

  • Max. Efficiency: 88~93%

  • Degree of protection: IP67

If you're interested in buying motor and controller together, please kindly click below picture.




Conversion kits for QS 2kW mid dirve hub motor


We're able to supply Controller, display, dc-dc converter, disc brake system, twist throttle, matched tire...etc.



 Application for 2kW mid drive motor
























Company Information

 About US

SIAECOSYS is an union of manufactories in electric driving industry, and belongs to Taizhou SIA Trading Co., Ltd that set from QS Factory in 2013 year.

Currently, more than 80 top factories join SIAECOSYS, and they are willing to provide customized products and service for international customers who has passion in e-scooter/tricycle/car industry.

SIAECOSYS focus on organizing member factories together to customize specific e-driving system solution and products for different requirements from customers in the world.

Nowadays, SIAECOSYS has more than 5000 customers from the world and more than 40 customers send inquiry every day.

SIAECOSYS has sale department, Technology department, Quality inspection department, general accounting department, purchase department and after-sale service department.







Q1. Are you trader or manufacture?

A: We're manufacture.


Q2. How long is your production time?
A: Generally, the production period is 12-14 working days(6 working days per week).

The specific delivery time depends on the items and the quantity of your order.

Q3. How long is your warranty time?

A: For motor, the warranty time is one year and three months. For other parts, the warranty time is one year.


Q4. About Customs Clearance

For some special countries with strict customs for import, so pls. confirm it firstly to us that you have ability to do customs clearance, otherwise we will not take on heavy responsibilities for this issue, return money and goods are not support.

Special countries list:

Argentina, Brazil, Egypt, Turkey, Iran,Portugal,Romania, Kazakhstan, Ukraine, Yeman etc.

Some countries name not listed, the salesman will inform you in time if you placed the order online directly. Thank you for your understanding.


05. Does your products with CE certification?

Yes, our motor with Certification (CE, CCC), and our factory with certification of ISO9001, TS86949


0.0101 s.