QS138 70H V2 72V IPM PMSM Mid Drive Motor with Spline Drive Output Shaft


This is E&C's Favorite Motor! It can be found in both the EMX14 and EMX17 Kits. This motor is perfect for medium size electric motorcyles. The QS138 70H is well known around the world for its ability to produce power in a small form factor. A tried and true motor that packs a hefty punch for its size and weight. We like this model because of its sleek look and convienent mounting points. This model is capable of over 30kW Bursts! 



1pc X QS 138 3kW Mid drive motor with 10t sprocket for spline drive

(we recommend buying our E&C sprocket to ensure proper fitment and to reduce the chance of damage to the spline drive)


Key Features 

  • Light weight and small dimension compared to other motors of similar power outputs
  • V configured rotor design allows for higher RPM with flux weakening
  • High Torque suitable for high performace high load situations such as climbing and racing.
  • Supports regenerative braking
  • Proven reliability

QS138 70H V2 (3000w)

  • Motor Type: BLDC Inner Rotor Motor

    Brand: QS Motor, QSMOTOR

    Motor Design: Single Axle

    Matched Tire: 12 inch Wheel (as default)

    Magnet Height: 70mm, 5 pole pairs

    Dimension: 162x210mm

    Rated Power: 6000W

    Peak Power: 10000W

    Rated Voltage: 72V

    Speed: 3800RPM (basic RPM)

    With Flux Weakening(RPM): 6000RPM

    Max Torque: 45-55N.m

    Cooling Method: Air Cooling

    Max Efficiency: 94%

    Continuous Battery Current: 67A (72V)

    Peak Battery Current: 140A (72V)

    Thermic Probe: KTY83/122 (as default)

    Working Temperature: 70-120C, peak 150C

    Hall Sensor: Single Hall Set with Waterproof Connectors

    Phase Wire: 16mm2 Cross Section (not include insulation layer)

    Waterproof Grade: IP67

    Color: Black

    N.W./G.W.: approx 11kgs/12.79kgs

    Package Dimensions: 34cmx34cmx33cm/piece