Flux switching type linear rotary permanent magnet actuator

Abstract

The invention provides a flux switching type linear rotary permanent magnet actuator. The actuator comprises a casing (1), stators, a mover, a winding and a mover shaft, wherein six stator poles are arranged in the circumferential direction of each stator; each stator comprises a stator yoke (2), the stator poles (5), tangentially-magnetized permanent magnets (6), U-shaped axially-magnetized permanent magnets (8) and concentrated windings (4); three same stators are arranged on the aluminum casing (1) in the axial direction; stator cores are connected by non-magnetic conductive materials; themover shaft is connected with the casing (1) through the sleeve connection of a linear bearing and a rotary bearing; the permanent magnets are embedded inside the stators; the mover comprises a movercore (3) and mover salient poles (7); and the mover salient poles are axially staggered by 22.5 degrees and forms a double-layer flux switching type structure together with the stator structure to improve the torque / thrust density. The actuator has the beneficial effects that the magnetization directions of the tangentially-magnetized permanent magnets and the axially-magnetized permanent magnetsare complemented to greatly increase the air gap flux density and further increase the torque / thrust density.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors, and is an electromagnetic device used in the field of industrial production that can realize linear, rotary or helical motion. Background technique [0002] Traditional motors can only achieve single rotation or linear motion. However, in the fields of industrial production, semiconductor packaging, aviation, and radar, there are more and more demands for multi-degree-of-freedom compound motion, and the requirements are getting higher and higher. Two-degree-of-freedom motion is one of the most widely used multi-degree-of-freedom motions. The traditional way to obtain two-degree-of-freedom motion in a straight line is through a combination of linear and rotary motion. Linear motion is usually performed by a servo motor that performs rotational motion through the middle. The mechanism is converted, and the rotary motion is completed by another motor. This kind of structure makes the two-degr...

AI Technical Summary

Problems solved by technology

This type of structure makes the two-degree-of-freedom drive mechanism have a larger volume and weight, and leads to larger system errors and lower positioning accuracy

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