Direct-drive electro-magnetic annular synchronous motor

By designing a segmented stator and segmented magnetic pole structure, combined with the absence of independent bearings and multi-layer sealing, stable and reliable operation of large mill motors has been achieved. This has solved the problems of installation and operation of large mills under high dust conditions, improved transmission efficiency and speed regulation performance, and reduced maintenance costs.

CN224191702UActive Publication Date: 2026-05-01XIANGTAN ELECTRIC MFG CORP LTD
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Patent Information

Application Number
CN202620434456.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2026-04-02
Publication Date
2026-05-01
Estimated Expiration
2036-04-02

AI Technical Summary

Technical Problem

Existing direct drive motors are difficult to adapt to the on-site installation conditions of large mills, and their sealing reliability, operational stability, and ease of maintenance under high dust conditions do not meet the high standards required for industrial applications.

Method used

It adopts a segmented stator and segmented magnetic pole structure, combined with a direct-drive structure without independent bearings, multi-layer sealing and a dedicated excitation power supply system, and is designed to adapt to the harsh working conditions of the mill site, so as to achieve stable, reliable and low-maintenance operation of the motor.

Benefits of technology

It solves the problems of transporting and installing large motors, improves transmission efficiency and operational stability, adapts to high dust conditions, reduces equipment maintenance costs, and meets the frequency conversion speed regulation requirements of mills.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model discloses a direct-drive electro-magnetic annular synchronous motor, and belongs to the technical field of large-scale synchronous motors. The motor comprises a split stator which is formed by splicing and fixing a plurality of stator petals along the circumferential direction; the block magnetic poles form a motor rotor, a plurality of independently-formed magnetic pole units are arranged at intervals in the circumferential direction, and each magnetic pole unit is directly and fixedly installed on the outer wall of the load rotating cylinder; the supporting and sealing structure is arranged at the axial end part between the split stator and the block magnetic pole and is used for sealing a gap between the split stator and the block magnetic pole; and the collector ring and brush carrier system is arranged at one axial end of the motor, and the output end of the collector ring and brush carrier system is electrically connected with the excitation windings of the block magnetic poles. According to the utility model, the split stator and the block magnetic pole structure are adopted, so that the transportation and field installation of the ultra-large motor are facilitated; the rotor is directly mounted on the outer wall of the milling cylinder to realize direct drive, a gear transmission link is omitted, the transmission efficiency is high, and operation is stable; a multi-layer sealing structure adapts to a high-dust environment, and the reliability is high; the speed regulation performance is good and the maintenance is convenient.
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