QS138 70h V1 (3000w) - Electro & Company Inc.

QS138 70h V1 (3000w)

Regular price$574.00
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QS138 70H V1 72V IPM PMSM Mid Drive Motor with Spline Drive Output Shaft

This motor is perfect for medium size electric motorcycles. 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. This motor 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 performance high load situations such as climbing and racing.
  • Supports regenerative braking
  • Proven reliability


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


EM-150 & Em-200 Controller

E&C Findings

Based on our testing we have come up with some alternative ratings. These ratings are strictly our opinion and warranty will not be provided for any motor pushed beyond QS recomended ratings.


Max Battery Current: 200 amps

Max Output: 14,500w or 14.5kw

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