QS 2kW 70KPH 72V 12inch Mid Drive Motor Kits Assembly

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Product Overview


QS 2kW 70KPH 72V 12inch Mid Drive Motor Kits Assembly

Product Description

For 2000W mid drive motor kit assembly, it could be used for electric scooter, electric motorcycle. 

e.g. M3 electric motorbike

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

Speed: continuous 70km/h

Gear ratio: 1:4.77

Battery: 72V40h NCM lithium battery

Tire: 130/70-12



One set including below kits

·1pc QS 12inch 2000W Mid Drive Motor assembly with Left/Right fork(Disc Brake and tire are not included)

·1pcs X Votol EM72100SP sine wave motor controller with standard CAN-BUS

·1pcs X DKD LCD speedometer

·1pcs X Z6 throttle with combination switch



Key Features
1). Simplify to make a electric-Scooter. 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

1. QSMOTOR 12X3.5inch 2000W 120 70H Mid Drive Motor Assembly

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

·Brand: QS Motor, QSMOTOR

·Motor Design: Single axle

·Matched Wheel: 12inch Wheel (as default)

·Magnet Height: 70mm, 40pcs, 5 pole pairs

·Diameter of stator: 120mm

·Rated Power: 2000W

·Rated Voltage: 72V as default

·Speed: 70KPH

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

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

·Reduction ratio: 1:4.77 (as default)

·Max Efficiency: 88%

·Continuous Battery Current: pending (72V)

·Peak Battery Current: 60A (72V)

·Suggest Peak Phase Current: 250A

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

·Working Temperature: Pending

·Single Hall Plate with waterproof connectors

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

·Hall Sensor Phasing angle: 120 degree

·Waterproof Grade: IP67

·Color: Black

·N.W./G.W.: 10.8kgs/11.5kgs   

·Package Dimension: 34cm*34cm*33cm

·Axle matched with belt as default







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Testing report




2. EM72100SP 72V sinusoidal wave BLDC motor controller, with CAN BUS


·Sine wave controller, programmable, with regen function  

·Rated Current:100A      

·BOOST Current:130A

·Peak Current:330A


·Flux Weakening Ratio:100~250%


·Net weight: 1650g                                                                          

·Waterproof IP67








3. DKD LCD speedometer, can-bus(optional, LIN as default)

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

P.s.: If the working battery doesn't have can-bus communication, then the can-bus speedometer will shows lack of electricity always.

So, we suggest to do the speedometer as Line communication version if client can't get can-bus battery.



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.





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.





Company Information



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