Types and characteristics of stepper motor stepper motor in the structure, there are three main types: reactive (Variable Reluctance, VR), permanent magnet (Permanent Magnet, PM) and mixed (Hybrid Stepping, HS). * Reaction windings on the stator, the rotor composed of a soft magnetic material. Simple structure, low cost, small step angle up to 1.2 °, but the dynamic performance is poor, low efficiency, heat a large, difficult to guarantee reliability. * Permanent magnet rotor permanent magnet stepper motor permanent magnet material, the rotor poles and stator poles same. Which is characterized by good dynamic performance, the output torque, but poor accuracy of this motor, step angle large (typically 7.5 ° or 15 °). * Hybrid hybrid stepper motor combines reactive and permanent magnet advantages of multi-phase windings on the stator, the rotor with permanent magnet materials, rotor and stator teeth are several small steps to improve the accuracy of moments. Its characteristics are output torque, dynamic performance, step angle is small, but the complex structure, the cost is relatively high. Press the stator windings to points, a total of two-phase, three-phase and five equal series. The most popular is the two-phase hybrid stepping motor, accounting for more than 97% of the market share, the reason is the high cost, coupled with broken drive to good effect. This kind of basic motor step angle of 1.8 ° / step, accompanied by a half step drive, the step angle is reduced to 0.9 °, coupled with the drive after its subdivision step angle can be broken up to 256 times (0.007 ° / micro step). Since friction and manufacturing precision and other reasons, the actual control accuracy is slightly lower. The same can be equipped with different segments of the stepper motor drive to change the precision and effectiveness. Ressaix stepper motor series ressaix two-phase, three-phase hybrid stepping motor, using high-quality cold-rolled steel and high temperature permanent magnet manufacturing, product specifications cover 35-130 range. With a low temperature, high reliability, due to its good internal damping characteristics, and thus running smoothly, no obvious shock zone. To meet the different industries, different environment's needs. Ressaix using patented technology developed three-phase stepper motor drive system, a better solution to the traditional stepper motor speed crawling, there is resonance, noise, high torque, low starting frequency and drives poor reliability shortcomings, with AC Some of the servo motor operating characteristics, its operating results may be comparable with the imported products. Two-phase stepper motor naming <> The above example indicates frame sizes 57mm, two-phase hybrid step angle of 1.8 degrees, torque 0.9Nm, design number 01, unilateral output shaft of the motor. Three-phase stepper motor naming <> The above example indicates frame sizes 57mm, three-phase hybrid step angle of 1.8 degrees, torque 0.9Nm, design number 01, unilateral output shaft of the motor. Two-phase stepper motor selection list, the number of phases appearance model static torque (NM) Step Angle (o) the number of phase current lead resistance (Ω) Inductance (mH) Length L (mm) Rotor Inertia (g.cm2) Weight ( kg) in series parallel adapter driver