Robot Vacuum Replacement Cliff Sensor 2020 ，Compatible for Roomba s9+ (9550) The brushless motor adopts electronic commutation to avoid mechanical contact noise and runs quieter. The motor has no mechanical commutator and adopts a fully enclosed structure, which can adapt to dry and wet garbage treatment, prevent dust from entering the motor, and reduce the possibility of failure. The permanent magnet motor can enter the generator state when braking, and can convert part of kinetic energy into electric energy to improve energy utilization rate. Compared with the asynchronous motor, the permanent magnet vacuum cleaner motor has simpler driving control, easier operation and more convenient use. The large torque makes the motor rotate strongly under load. If it encounters large particles or hair entanglement, it can maintain a stable rotating speed and smoothly suck away garbage. The blades are driven to rotate at a high speed to generate negative air pressure in the sealed shell, thereby absorbing dust, hair, debris and other garbage. The mechanical characteristics of the single-phase series motor are hard. When the air path conditions change, that is, when the motor load changes in a wide range, the motor The speed changes very little, which can keep the vacuum cleaner with stable dust collection performance.