Stepper motor

A stepper motor, comprising:

• two plates arranged opposite to each other;
• a rotary shaft having two ends supported on and in rotational connection with the two plates, respectively;
• a magnet sleeved and fixed on an outer periphery of the rotary shaft;
• and
• a stator unit sleeved on the rotary shaft;
• wherein the two plates are arranged on both sides of the magnet in an axial direction of the rotary shaft and to space from the magnet, the stator unit comprises a plurality of windings arranged to space from the magnet, and the plurality of windings are fixed between the two plates and are arranged along the axial direction of the rotary shaft;
• wherein each winding of the plurality of windings comprises two respective claw poles arranged opposite to each other and sleeved on the rotary shaft and at least two respective solenoids fixed between the two respective claw poles, the at least two respective solenoids are arranged at intervals along a circumferential direction of the rotary shaft and arranged on both sides of the magnet, and each solenoid of the at least two respective solenoids comprises a respective iron core fixed between the two respective claw poles and a respective coil wound on the respective iron core;
• and
• wherein coils of the plurality of windings that align with each other along the axial direction of the rotary shaft have a same axis, every two adjacent windings of the plurality of windings are connected to each other by fixing two respective adjacent claw poles to each other, and two claw poles of the plurality of windings that are respectively adjacent to the two plates are fixed and connected to the two plates, respectively.