Bilateral primary permanent magnetic vernier linear motor

Abstract

The invention discloses a bilateral primary permanent magnetic vernier linear motor which comprises a primary motor part and a secondary motor part. The primary motor part comprises primary iron cores, an armature winding and permanent magnets. Semi-closed groove design is adopted in the primary iron cores, the permanent magnets are attached to the surfaces of armature teeth, the magnetizing directions of every two adjacent permanent magnets on the same primary iron core are opposite, and the armature winding is installed in a semi-closed groove. The secondary motor part comprises secondary iron cores and secondary salient poles. An air gap is formed between the primary motor part and the secondary motor part. The primary motor part does not need yoke iron cores, so that the weight of the primary motor part is reduced; the secondary motor part is formed only by stacking silicon steel stamped sheets with the salient poles, permanent magnets and windings are not arranged, and the mechanical strength is high; the system dynamic performance can be improved through a movable primary structure; the armature winding and the permanent magnets are all located in the primary motor part so that the motor can be cooled conveniently.

Description

technical field [0001] The invention relates to a double-sided primary permanent magnet vernier linear motor, which can be used in reliable and high-efficiency linear motion fields such as rail transit, elevator drive, and low-speed high-thrust. Background technique [0002] Linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism, so it has obvious advantages over traditional transmission methods, such as simple structure, no wear, high precision, and high efficiency. Therefore, linear motors are more and more widely used. [0003] There are many types of linear motors, and the primary permanent magnet linear motor is one of them. The armature winding and permanent magnet are located in the primary, and the secondary is only an iron core with salient poles. Therefore, the secondary structure is simple and the mechanical strength is high. , easy cooling of permanent magn...

AI Technical Summary

Problems solved by technology

The traditional primary permanent magnet vernier linear motor usually includes a primary yoke core, which virtually increases the weight of the motor primary, especially for long secondary and short primary applications such as rail transit, which will greatly increase the weight of the entire moving parts, not only Increases the engineering cost of the system and will affect the dynamic performance of the system

[0004] The traditional bilateral linear motor is basically a simple superposition of two unilateral linear motors, and the overall performance parameters of the motor, such as power density, have not improved significantly

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