Radial wire winding stator magnetic pole piece structure

The utility model relates to an iron pole piece structure of a radial winding stator. The iron pole piece consists of a hub and a plurality of poles. The center of the hub is provided with a hole. Every pole is integrated with the hub. Moreover, every pole extends radially from the radial circumference of the hub, and expands tangentially at the tail end to form a pole terminal. The iron pole piece structure is characterized in that the value of the angle of a single pole terminal divided by the polar angle of two neighboring poles is between 0.86-0.95. With the iron pole piece structure, the optimized ratio alpha is used to define the iron pole piece shape to increase the overlapping of the inductance and the torque and reduce the cogging torque of a motor. Moreover, the self-startup capability of the motor is strong and the torque ripple is small, so the overall performance of the motor is promoted.