Motor stator and alternating current motor

A motor stator, comprising:

• a stator yoke;
• and
• a stator winding;
• wherein a cavity with two ends passing through is provided inside the stator yoke;
• the stator winding comprises a flexible circuit board formed by winding and having a same shape as the cavity;
• one end of the flexible circuit board is provided with a terminal, the terminal is configured to connect an external alternating current (AC) power source;
• the flexible circuit board comprises at least two conductive layers, and a plurality of groups of coils are provided in the conductive layers;
• the plurality of groups of coils are provided at intervals along a circumference of the stator yoke, and are electrically connected to the terminal;
• the at least two conductive layers are provided in a stacked manner with one on top of the other, and the plurality of groups of coils in the at least two conductive layers are stacked in pairs along the radial direction of the stator yoke, and magnetic field directions of two coils stacked on each other in the at least two conductive layers are the same;
• and
• the flexible circuit board is attached to an inner wall of the stator yoke;
• current passes through the coil, generating a radial magnetic field perpendicular to the stator yoke in an air gap of the motor, and interacts with a rotor magnetic field to generate an electromagnetic torque required for the operation of the motor.