utf8 QS 138 3000W 72V 100KPH Mid drive motor power train kits with motor controller

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QS 3000W 138 72V 100KPH Mid drive motor 12inch assembly kits with EM150SP Controller

Price:US $813.00/piece
Production Period:17~18 working days
  • QS 138 3000W 72V 100KPH Mid drive motor power train kits with motor controller
  • QS 138 3000W 72V 100KPH Mid drive motor power train kits with motor controller
  • Votol EM150SP sine wave motor controller with standard CAN-BUS
  • QSMOTOR 138 3000W PMSM IPM mid drive motor with sprocket
  • DKD LCD speedometer with standard CAN-BUS
  • Z6 throttle with combination switch

 QS 3000W 138 72V 100KPH Mid drive motor 12inch assembly kits with EM150SP Controller 


For 138 3000W mid drive motor kit assembly, it could be used for electric scooter, electric motorbike, which could be 72V 100KPH, avaiable for 12inch wheel kits as default (14inch wheel assemble kits will comes out soon).

e.g. Z6 electric motorbike

E-motorbike weight, approx 115kg+2*80kg

Speed: continuous 100km/h

Gear ratio: 1:4.77 (double steps transmission )

Climbing slope: 30°@190kg

Battery: 72V40h NCM lithium battery

Tire: 130/70-12

For Aliexpress online purchase link, please kindly click below picture.



One set including below kits

 1.1pcs X QS 3000W 138 Mid Drive Motor with Left/Right fork

2.1pcs X EM150SP Controller, 72V 360A, sine wave motor controller

3.1pcs X Rear synchronous belt wheel 

4.2pcs X Decoration cover

5.1pcs X Rear axle with screws

6.2pcs X Adapter

7.1pcs X Synchronous belt

8.1pcs X 12inch Aluminum wheel

9.1pcs X Fender

10.1pcs X Belt shield 

11.1pcs X side shield

12. 1pcs X DKD LCD speedometer with standard CAN-BUS

13. 1pcs X Z6 throttle with combination switch

14. LNF Disc Brake assembly



Key Features

1) Light weight and small dimension compare to hub motor 

2) High performance benefit from flux weakening

3) High efficiency during climbing, and better acceleration  

4) Support regenerative braking


Product description

Item: QS Motor 3000W 138 70H IPM PMSM Mid Drive Motor

·Motor Type: BLDC Permanent Magnet Inner Rotor Motor With Hall Sensor

·Brand: QS Motor, QSMOTOR

·Motor Design: Single axle 

·Matched Wheel: 12X3.5inch Wheel (as default)

·Magnet Height: 70mm,  5 pole pairs

·Diameter of stator: 138mm

·Rated Power: 3000W (9600W peak)

·Rated Voltage: 72V as default

·Speed: 100KPH 

·No-load rpm: 3800rpm without flux weakening, 6000RPM with flux weakening.

·Max Torque: approx 55N.m without Reduction ratio, approx 247N.m with 1:4.77 Reduction ratio  

·Reduction ratio: 1:4.77 (as default)

·Max Efficiency: 88%

·Continuous Battery Current: 120A (72V)

·Peak Battery Current: 150A (72V)

·Suggest Peak Phase Current: 450A

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

·Single Hall Plate with waterproof connectors

·17mm² Cross Section of Phase Wire (not include insulation layer)

·Hall Sensor Phasing angle: 120 degree

·Waterproof Grade: IP54

·Color: Black 

·N.W./G.W.: 32.5kgs/34.5kgs   

·Package Dimension: pack in two carton with wooden support.

70cm*39cm*25cm, 22.53kg

51cm*48cm*37.5cm, 12kg



Dimension Drawing:

QS 3kW 138 mid drive motor


QS 3kW 138 mid drive motor Assembly



Power train test Report:





2. Votol EM150SP motor controller with standards CANBUS

主图 EM72150SP



3. DKD LCD speedometer with standard CAN-BUS

It display D N R, P, S gear, and battery current X5/10

主图 仪表


4. Z6 throttle with combination switch

With Reverse, Parking button( throttle on/off), 3 slide switch gear, s/boost button, Light and Horn. It match with VOTOL controller well.




主图 微信图片_20190709082306


4. LNF disc brake assembly

Assembly include master cylinder, 220mm brake hose, disc brake disc(Diameter 220cm 4mm thickness PCD4*78mm CB58), Conversion bracket, Caliper



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.



Application for 3kW mid drive motor


3000W mid drive

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