Low-eddy-current-loss primary structure of tooth groove type cylindrical linear motor

Abstract

The invention discloses a low-eddy-current-loss primary structure of a tooth groove type cylindrical linear motor. The low-eddy-current-loss primary structure comprises primary teeth, a primary yoke and a plurality of ring windings; the primary teeth and the primary yoke are separated components and are tightly sleeved together to form a primary iron core; one or more circular ring windings are embedded between every two primary tooth components; each annular primary tooth component is formed by arranging a plurality of tooth iron core blocks of the same specification in an array mode along the side length of an equilateral polygon, and each iron core block is formed by laminating silicon steel sheets in the circumferential direction; and the primary yoke component is formed by laminating silicon steel sheets along the motion direction of the motor, and each lamination is uniformly provided with a plurality of yoke shallow slots along the circumferential direction so as to block an eddy current path along the direction. According to the low-eddy-current-loss primary structure of the tooth groove type cylindrical linear motor of the invention, the primary iron core is combined by adopting a mode of tooth and yoke separation and lamination in different directions, so that the eddy current loss of the tooth groove type cylindrical linear motor can be effectively reduced, the efficiency of the motor is improved, and meanwhile, the motor can maintain relatively high thrust density.

Description

technical field [0001] The invention relates to the field of motors, in particular to a primary structure of a low eddy current loss cogging type cylindrical linear motor. Background technique [0002] Compared with the traditional rotary-linear transmission mechanism, the linear motor system can directly provide linear thrust to the load without any mechanical conversion device, and has the characteristics of fast dynamic response and high reliability. Among the many topological structures of linear motors, the magnetic field of cylindrical permanent magnet synchronous linear motors is closed in the circumferential direction, the magnetic circuit has good symmetry, no lateral edge effect, simple structure, high force density, and good servo performance. much attention. Compared with the slotless cylindrical linear motor, the cogged linear motor can provide higher thrust density and transmission efficiency, but the primary of the cogged linear motor is a sleeve-type structu...

AI Technical Summary

Problems solved by technology

Compared with the slotless cylindrical linear motor, the cogged linear motor can provide higher thrust density and transmission efficiency, but the primary of the cogged linear motor is a sleeve-type structure, which will form a large eddy current, which greatly It affects the performance of the motor and limits the expansion of its application range. Therefore, reducing eddy current loss is very important for the practical application of cogged cylindrical linear motors

In the existing primary structure of a cylindrical linear motor (publication number: 111668946A), the primary iron core is spliced ​​in pieces, which has a good eddy current suppression effect, but at this time the primary yoke core is missing a lot, and the gap is too large Causes a drop in thrust density, resulting in inefficient use of electromagnetic energy

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