Advantages of QS138 70H V3 MID Drive motors

1. Superb Power Output

* High Power and Torque: Rated power is 3000W, with peak power reaching 11kW (even capable of 28kW bursts when paired with a specific controller). Shaft torque is ≥98Nm (up to 120Nm under certain testing conditions), far exceeding similar products. For example, at 72V, it can power a 208kg electric motorcycle at a continuous speed of 100km/h and easily climb a 31° slope.

* High Speed ​​and Responsiveness: A built-in 1:2.37 gearbox reduces motor speed before output, enabling a top speed of 100-110km/h and rapid acceleration, making it ideal for competitive racing.

2. Optimized Structural Design

* Integrated Gearbox: The integrated design of the reduction gear and motor eliminates components such as chains and sprockets found in traditional transmission systems, significantly saving space and reducing maintenance costs. For example, it is directly compatible with compact vehicles such as karts and ATVs without requiring additional transmission modifications. Lightweight and Heat Dissipation: Utilizing an aluminum alloy housing, the unit weighs only 10.8-14kg. Class F insulation (temperature resistance 150°C) and IP67 waterproof design ensure stable operation in high-temperature and humid environments.

* Modular Adaptability: Supports dual Hall effect sensor and encoder feedback, and is compatible with controllers such as the EM150 and EM200, enabling multi-speed shifting (1-3 gears), sport mode switching, and regenerative braking.

3. Energy Efficiency and Reliability

* High Energy Efficiency: Utilizing a V-shaped rotor design and permanent magnet synchronous technology, it achieves a maximum efficiency of ≥93%. At 72V, it outperforms hub motors of the same power. For example, when paired with a 72V, 52Ah battery, the freight electric vehicle can carry a 200kg load and travel over 80km.

* Durability Verification: The gearbox has passed over 100,000 cycles of life testing and operates in a wide temperature range of -20°C to 80°C, making it suitable for high-intensity scenarios such as logistics fleets and outdoor off-roading.