There are three types of stepper motors: PM, VR, and HB.
Permanent magnet stepping is generally two-phase, torque and volume is small, the step angle is generally 7.5 degrees or 15 degrees;
Reactive stepping is generally three-phase, and it can achieve large torque output. The step angle is generally 1.5 degrees, but the noise and vibration are large.
Hybrid stepping refers to the advantages of mixing a permanent magnet type and a reactive type. It is divided into two phases and five phases: the two-phase step angle is generally 1.8 degrees and the five-phase step angle is generally 0.72 degrees. This stepper motor is the most widely used.