The surface permanent magnet structure has a small rotor diameter, low rotational inertia, large equivalent air gap, small positioning torque, and low winding inductance,Servo Motor which is conducive to the improvement of the dynamic performance of the servo motor; at the same time, the armature response of this rotor structure motor is small,Servo Motor The torque-current characteristic has high linearity, simple control and high accuracy. Therefore, the permanent magnet AC servo motor usually uses this rotor structure.
According to the above analysis, the permanent magnet synchronous servo motor with embedded permanent magnet rotor has the following advantages: the permanent magnet is located inside the rotor, the structure of the rotor is simple, the mechanical strength is high, and the manufacturing cost is low. The rotor surface is silicon steel sheet,Servo Motor so the surface loss is small. The equivalent air gap is small, but the air gap magnetic density is high, suitable for weak field control. The permanent magnets have a high degree of freedom in shape and configuration, and the rotor has a small rotational inertia.
The reluctance torque can be effectively used to improve the torque density and efficiency of the servo motor. The salient pole effect of the rotor can be used to realize the start-up and operation of the sensorless position.
Therefore, the permanent magnet synchronous servo motor with embedded permanent magnet rotor is suitable for fields that require high speed, large torque, high power,Servo Motor high efficiency, weak field control and a wide range of constant power speed regulation.