Electric roller motor

The invention provides an electric roller motor, which at least comprises a rotor core, a shaft, a stator fixing block, an exciting winding, 4X stator cores, a bearing and an armature winding, wherein the electric roller motor is of an outer rotor structure; a transmission belt is directly driven by an outer circumference surface of the rotor core; X is a positive integer; each stator core is provided with two stator poles; the rotor core is provided with 9X rotor poles which protrude inwards; the polar distance between two stator poles on the same stator core is equal to that between the rotor poles; an armature coil along the circumferential direction can be sequentially divided into two phases of windings with an electrical angle of 90 degrees. The two phases of windings of the motor can form two isolated channels, and when one channel is in a fault, the other channel can carry out fault-tolerant operation, so that the reliability of a system is improved and the motor can be used for directly driving a rol