All Ampler bikes have a small geared hub drive with a brushless motor. Brushless motors mean that there are no brushes between the stator and the rotor. This makes the motor efficient and means that there are no wearing parts in need of replacement, making it essentially service-free. The motor was developed by Ampler together with Aikema.
- The maximum torque is 50 Nm
- The motor has a nominal power output of 250 W.
- The peak power output of the motor is about 400 W.
- The motor complies with the European standard EN15194, which also means a maximum assist of 25 km/h
Due to its brushless design, no energy recuperation is possible, but this also means that no resistance is felt without motor assistance. A regular freewheel is installed inside the motor.
Operating the motor requires sophisticated electric systems. We’ve custom-developed a control board which ensures smooth and quiet operation even at high power levels. The hub motor includes double gear reduction to get a maximum torque of 50 Nm at a motor diameter of just 120 mm, allowing for a high power-to-weight ratio while keeping the looks inconspicuous.