Moving-magnetic type linear motor

Abstract

The invention provides a moving-magnetic type linear motor which mainly comprises a stator and a rotor, wherein the stator comprises two yoke supporting rings in the shape of a circular ring, and at least four strip-shaped stator yokes which are uniformly distributed along the circular ring are arranged between the two yoke supporting rings; the inner surface of each stator yoke is in a tooth socket structure which comprises N stator teeth; a coil is coiled on the tooth socket structure; after the coil is electrified, adjacent stator teeth form opposite magnetic poles; the rotor is positioned in a cylindrical cavity surrounded by the stator yokes; for each stator yoke, the rotor has N-1 magnetic poles which are axially arranged in parallel, the magnetic lines of the magnetic poles are distributed in the radial direction, and the polarities of adjacent magnetic poles which are arranged at intervals are opposite; and the rotor is connected with a plate spring through a connection shaft. The moving-magnetic type linear motor reduces the magnetic leakage loss, improves the permanent magnet efficacy, has good radiating effect and simple and compact structure, and is convenient in installation and maintenance.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a moving magnet linear motor. Background technique [0002] Traditional moving magnet linear oscillating motors such as figure 1 As shown, it has a cylindrical axisymmetric outer iron yoke 11 and an inner iron yoke 12 , and the armature coil 2 is embedded in the groove of the outer iron yoke 11 . Four permanent magnetic rings 41, 42, 43, 44 are located in the air gaps of the inner and outer iron yokes. When the permanent magnet mover moves from the position shown in the figure to the right end of the stroke, the main magnetic flux passes through the inner and outer iron yokes 11, 12 and the permanent magnets 41 and 43 to form a loop, and the permanent magnet flux is clockwise; when the permanent magnet mover moves from When the position shown in the figure moves to the left end of the stroke, the main magnetic flux passes through the inner and outer iron yokes 11, 12 and the per...

AI Technical Summary

Problems solved by technology

In terms of electromagnetic structure, the motor with this structure often arranges permanent magnet rings with different polarities next to each other, such as figure 1 The permanent magnets 41 and 42 are adjacent to each other, and the permanent magnets 43 and 44 are adjacent to each other, so that a considerable part of the permanent magnet flux is directly closed without passing through the armature core, which increases the leakage loss and reduces the performance of the permanent magnet; The coil 2 is in the semi-enclosed yoke iron box 1, which increases the difficulty of processing, installation and maintenance of the yoke iron; and is not conducive to the heat dissipation of the armature; when changing the electromagnetic power according to the application requirements, there is a lack of simple and effective methods

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