Bilateral staggered teeth 180° low thrust fluctuation continuous pole permanent magnet synchronous linear motor

Abstract

The invention provides a bilateral 180 DEG-staggered tooth low-thrust ripple continuous pole permanent magnet synchronous linear motor, which belongs to the technical field of motors. The bilateral 180 DEG-staggered tooth low-thrust ripple continuous pole permanent magnet synchronous linear motor comprises a first primary assembly, a second primary assembly and a secondary assembly, wherein both the first primary assembly and the second primary assembly are formed by armature windings and primary iron cores; the secondary assembly is composed of permanent magnets, iron poles and back yokes; the permanent magnets all have the same polarity and are arranged alternatively with the iron poles; the permanent magnets are attached to the upper surface and the lower surface of a yoke plate; the iron poles and the yoke plate are integrally formed; the first primary assembly and the second primary assembly are located at two sides of the secondary assembly, and two air gap structures are formed with the secondary assembly; and the first primary assembly and the second primary assembly are staggered for a 180-DEG electrical angle in a horizontal direction, that is, a distance of displacement S=ktau (k is an uneven number and tau is the pole pitch of the motor) is staggered. A three-phase winding on the first primary assembly is arranged in an iron core slot according to a sequence of A-B-C, a three-phase winding on the second primary assembly is arranged in an iron core slot according to a sequence of A-B-C, and in-phase windings on the first primary assembly and the second primary assembly have opposite winding directions. The structure can reduce the thrust ripple of the motor, and a unilateral magnetic pulling force and the ripple thereof can be reduced.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a double-sided staggered 180° low-thrust fluctuation continuous-pole permanent-magnet synchronous linear motor. Background technique [0002] Continuous pole permanent magnet synchronous linear motor adopts permanent magnets and iron poles alternately arranged to form a magnetic circuit. The amount of permanent magnets is only 50% of that of conventional motors, but the thrust generated is not less than 85%, which greatly improves the utilization rate of permanent magnets. . Using two primary components and one secondary component can effectively eliminate the unilateral magnetic pull and make full use of the volume space, and double the thrust without changing the length of the mover. It has the advantages of high thrust and thrust density, so in each This kind of high-precision linear linear motion occasion has a wide range of application prospects. However, the flat plate l...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of large thrust fluctuation of the existing double-primary continuous pole permanent magnet synchronous linear motor, the present invention proposes a bilateral staggered tooth 180° low thrust fluctuation continuous pole permanent magnet synchronous linear motor

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