Mixed excitation servo motor

Abstract

The invention proposes a hybrid excitation servo motor, which includes a stator core, a rotor core, an excitation winding, an armature winding, a permanent magnet and a shaft, and belongs to the technical field of special motors. The rotor core is fixed on the shaft, and there are 10 uniformly distributed convex rotor poles on the rotor core; the stator core has 12 convex stator poles, and the 12 stator poles can be divided into 6 pairs of parallel stator poles; each pair There is an armature slot between the two stator poles of the parallel stator poles, and an excitation slot between two adjacent pairs of parallel stator poles; each pair of parallel stator poles is wound with an excitation winding, and the winding directions of the adjacent excitation windings are opposite; The field winding is located at the bottom of the field slot; each stator pole is wound with a concentrated armature winding, and the armature winding is located at the notch of the field slot and the armature slot; the yoke of the two stator poles of each pair of parallel stator poles The part is embedded with tangentially magnetized permanent magnets, and the magnetization directions of adjacent permanent magnets are opposite. The technology of the invention not only has the advantages of the hybrid excitation motor, but also the excitation winding and the armature winding are isolated from each other, there is neither permanent magnet nor excitation winding on the rotor to interfere with each other, 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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