Mixed excitation servo motor

Abstract

The invention discloses a mixed excitation servo motor. The mixed excitation servo motor comprises a stator iron core, a rotor iron core, excitation windings, armature windings, a permanent magnet and a shaft, belonging to the special motor technology field. The rotor iron core is fixed on the shaft; ten convex rotor poles are uniformly distributed on the rotor iron core; the stator iron core has twelve convex stator poles; the twelve stator poles consists of six pairs of parallel stator poles; an armature groove is arranged between the two stator poles in each pair of parallel stator poles; an excitation groove is formed between two adjacent pairs of parallel stator poles; an excitation winding is wound on each pair of parallel stator poles; the winding directions of adjacent excitation windings are reverse; the excitation winding is arranged on the bottom of the excitation groove; a concentrated armature winding is wound on each stator pole; the armature winding is arranged at the notches of the excitation groove and the armature groove; tangential magnetizing permanent magnets are embedded in the yoke parts of the two stator poles in each pair of parallel stator poles; and the magnetizing direction of the adjacent permanent magnets are opposite. The mixed excitation servo motor has advantages of the mixed excitation motor; the excitation windings are isolated from the armature windings; the rotor has no permanent magnet and no excitation winding, so that the mutual-interference does not exist and the reliability is high.

Description

technical field [0001] The invention relates to a hybrid excitation servo motor, which belongs to the technical field of special motors. Background technique [0002] The servo motor can control the speed and position accuracy very accurately, and can convert the voltage signal into torque and speed to drive the control object. It is widely used in the field of industrial production automation. In the early stage of servo motor development, DC motor became the main type of servo motor due to its good controllability, and was widely used in various servo systems such as machine tools. However, with the advancement of science and technology, especially the emergence of rare earth permanent magnet materials, permanent magnet AC servo motors can meet the requirements of modern high-performance servo systems for high precision, wide speed range, low speed, high torque, good stability, and fast dynamic response. requirements. Hybrid excitation not only has all the advantages of ...

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Problems solved by technology

With the deepening of the research, the inventor found that the technology proposed in the early stage still has a large commutation torque ripple, so it is urgent to study a high-reliability servo motor with small commutation torque ripple

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