The manufacturing process of motor core has a great impact on the operation performance of motor. The manufacturing process of motor core includes punching manufacturing and core press fitting. The modern stamping technology of motor iron core parts is to use multi station progressive die with high precision, high efficiency, long service life and integrating all processes in one die for automatic stamping on high-speed punch. The punching process is that after the punched strip comes out of the coil, it is leveled by the leveling machine, then automatically fed by the automatic feeding device, and then the strip enters the die, which can continuously complete the punching of blanking, forming, finishing, edge cutting, automatic lamination of iron core, blanking with twisted lamination and blanking with rotary lamination, until the finished products of iron core parts are transported out of the die, The whole punching process is completed automatically on the high-speed punch.

The motor core is a permanent magnet stepping motor core, and its performance is comparable to that of hybrid motor core; Different from the cylindrical rotor in hybrid and traditional permanent magnet motor iron core, the rotor in disc motor iron core is a thin (usually less than 1mm) disc. The traditional permanent magnet motor iron core is usually limited to a small step angle of 30 °, up to 12 stages / revolution.

Until recently, the stepper motor provided an additional 200 steps / revolution. Before, the resolution could only be obtained through the hybrid stepper motor; The new version has a 0.9 step angle and can provide 400 steps / revolution. Due to the very low distortion of the output torque sinusoid, the micro stepping accuracy is high.

The core of disc motor is usually slightly half larger than that of hybrid motor with the same power output, and the weight is reduced by 60%; The rotor and magnetic circuit in the stator are very light. The stator is molded plastic rather than metal.

Traditional DC servo motor cores use iron core armature, in which the coil is wound in the slot. However, some servo motor cores contain a flat armature composed of several layers of copper conductors combined with a rigid insulating disk. Since no iron is required in the disc armature, the inertia is very small. Thin armature design provides high torque inertia ratio; The high ratio produces an acceleration from 0 to 3000 rpm at a speed of only 60 revolutions.