Three main types of stepper motors you should know

2018.10.30 Tue 更新

Three main types of stepper motors you should know: Permanent Magnet Stepper Motor: Permanent magnet motors use a permanent magnet (PM) in the rotor and operate on the attraction or repulsion between the rotor PM and the stator electromagnets.

A closed-loop stepper motor system may be the best option when the application requires improved energy efficiency and smoothness of operation, especially at high loads.
出典 : https://www.oyostepper.com/category-30-b0-Closed-Loop-Stepper-Motors.html

Linear Stepper Motors can dramatically reduce cost and save space. There is no coupling, no additional bearing support and no assembly work required.
出典 : https://www.oyostepper.com/category-22-b0-Linear-Stepper-Motor.html