QSMOTOR QS138 90H 4000W V3 Brushless Motor — A True "Beast" for Your Projects
Searching for the heart of your future buggy, powerful ATV, or custom electric vehicle? QSMOTOR QS138 90H V3 is a modern standard in the world of electric transport, combining colossal power, compactness, and legendary reliability.
Why is this motor the best choice?
-
Incredible Peak Power: With a nominal rating of 4 kW, this motor is capable of delivering up to 45 kW at peak (for up to one minute). This means instant acceleration and confidence on any off-road terrain.
-
Integrated Gearbox (1:2.37): Forget about complex transmission systems. The built-in gearbox provides a massive torque of up to 180 Nm directly at the shaft, making it ideal for heavy machinery and steep climbs.
-
Zero Maintenance: Thanks to the brushless (BLDC) design, there are no brushes to wear out. The motor operates on a "set it and forget it" principle.
-
Extreme Durability: IP67 protection allows you to confidently cross puddles and mud, while the integrated KTY83/122 temperature sensor protects the windings from overheating during peak loads.
Technical Specifications:
| Parameter | Value |
| Power (Nominal / Peak) | 4 kW / 45 kW |
| Torque | up to 180 Nm |
| Max Efficiency | 93% |
| Max Current (Phase / Battery) | 1000A / 600A |
| Shaft RPM (at 72V) | 4500 RPM |
| Weight | 14.5 kg |
| Sprocket Pitch | 428 (15 teeth) |
| Phase Wire Thickness | 20 mm² |
V3 Version Features:
This is the third and most advanced generation of the motor. It features thickened magnets (90 mm) and a reinforced stator, allowing it to handle massive currents without loss of efficiency. Control via Hall sensors ensures a smooth start even under heavy loads.
Expert Tip: To unlock the full potential of this motor, we recommend using Fardriver series controllers (e.g., ND721000 or ND961000), which are designed to work correctly with such high phase currents.
Applications:
Electric ATVs (Quad bikes).
Buggies and Go-karts (UTV).
Tricycles and light commercial EVs.
Motorcycle conversion into high-power electric bikes.
What's Included: The motor comes with a 15-tooth sprocket for a 428 pitch, allowing you to proceed directly to installation.