This article will introduce you to the basics of stepper motors, including their operating principle, construction, control methods, uses, types and their advantages and disadvantages. 1. stepper motor basics Stepper motor is a kind of motor that rotates the shaft by stepping (i.e. moving at a fixed angle). Its internal structure makes it possible to know the exact angular position of the shaft without a sensor, by simply calculating the number of steps. This feature makes it suitable for a wide range of applications. 2. stepper motor principle of operation Like all motors, stepper motors include a fixed part (stator) and a movable part (rotor). The stator has a gear-like protrusion around which a coil is wound, while the rotor is a permanent magnet or variable reluctance core. We will cover the different rotor configurations in more depth later. Figure 1 shows a cross-section of a motor with a variable reluctance core rotor.Translated with DeepL.com (free version)
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