Coreless blade linear stator motor

By using a coreless blade-type linear stator motor structure, the problems of iron loss, weight, uneven magnetic field distribution, and cogging effect of traditional iron-core motors are solved, achieving efficient, lightweight, and precise motor operation, which is suitable for weight-sensitive applications and mass production.

CN122371629APending Publication Date: 2026-07-10NINGBO YINZHOU WEISHENG ELECTROMECHANICAL SCI& TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO YINZHOU WEISHENG ELECTROMECHANICAL SCI& TECH
Filing Date
2026-04-27
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Traditional linear motors with iron cores suffer from problems such as high iron loss, heavy weight, large moment of inertia, uneven magnetic field distribution, and obvious cogging effect, which affect motor efficiency and accuracy, and the winding equipment has a low degree of automation.

Method used

The coreless blade linear stator motor structure includes a coreless stator assembly and a permanent magnet assembly. The stator assembly is placed between the permanent magnet assemblies to form an air gap. It adopts a straight plate-shaped multiphase winding and a stacked conductive ring design to avoid cogging effect and iron loss. The conductive ring is formed by stacking and welding conductive plates, and the outer side is covered with a potting compound to enhance the structure and insulation performance.

Benefits of technology

It reduces energy loss, lightens weight, improves starting speed and dynamic response, enhances insulation performance and shock resistance, improves motor operating efficiency and precision, adapts to weight-sensitive applications, simplifies winding process, and is suitable for mass production.

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Abstract

This invention provides a coreless blade-type linear stator motor, comprising a coreless motor stator and a moving motor rotor that moves relative to it. The moving motor rotor includes a rotor frame and permanent magnet groups, which are arranged opposite each other on the side walls of a mounting slot to form several excitation magnetic fields. The coreless motor stator includes a fixed base and a coreless stator assembly, which is placed between two permanent magnet groups to form an air gap. The coreless stator assembly includes multi-phase windings, all of which together form a straight plate structure. Each phase winding includes an input phase end, an output phase end, and several sub-windings. Each sub-winding consists of multiple conductive coils connected sequentially. Each conductive coil includes a first conductive strip and a second conductive strip that are stacked and electrically connected to each other to form an armature magnetic field. This invention eliminates iron loss, reduces weight, lowers moment of inertia, and improves starting speed and operating efficiency through its coreless structure.
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