Double-side staggered-tooth tau/2 short primary permanent magnet synchronous linear motor

Abstract

The invention discloses a Double-side staggered-tooth tau / 2 short primary permanent magnet synchronous linear motor. The motor comprises a primary assembly, a first secondary assembly and a second secondary assembly, wherein the primary assembly is composed of an upper armature winding, a lower armature winding and a primary iron core, the upper part and the lower part of the primary iron core areboth provided with a groove, and the armature windings are arranged in the grooves respectively; the first secondary assembly and the second secondary assembly are both composed of a permanent magnetand a yoke plate, and the permanent magnets are pasted on the lower surface of the yoke plate of the first secondary assembly and the upper surface of the yoke plate of the second secondary assemblyrespectively; the primary assembly is located between the first secondary assembly and the second secondary assembly and form air gap structures with the first secondary component and the second secondary component respectively; the displacement of the upper armature winding and the lower armature winding of the primary assembly in the transverse direction is S which is equal to tau / 2, and tau isthe polar distance of the motor; in the upper armature winding and the lower armature winding on the primary assembly, the space electric angle difference theta of the same-phase windings is smaller than or equal to 60 degrees and smaller than or equal to 120 degrees or theta is larger than or equal to -120 degrees and smaller than or equal to -60 degrees. By means of the structure, the thrust ripple of the motor is reduced, and meanwhile unilateral magnetic tension and fluctuation of the unilateral magnetic tension are reduced.

Description

technical field [0001] The invention belongs to the field of motors, in particular to a short primary permanent magnet synchronous linear motor with bilateral staggered teeth τ / 2. Background technique [0002] Double-secondary permanent magnet synchronous linear motors (such as Figure 7 Shown) In the case of processing technology and precision guarantee, the normal electromagnetic attraction formed between the primary and secondary can basically cancel each other on the middle part, so that the normal force generated in the motor can be dispersed to the two sides On the bearing, there is a strong guarantee for eliminating the influence of the normal force on the performance of the motor; and the motor with a double-sided structure can provide greater thrust in a given volume, and is more suitable for occasions with high thrust density. However, due to the common influence of end effect, cogging effect and armature reaction, this type of motor has the disadvantage of large t...

AI Technical Summary

Problems solved by technology

But its disadvantage is that the average thrust of the motor is reduced, and at the same time, the original characteristic that the primary component bears the unilateral magnetic pull force from the upper and lower secondary components just completely cancels out, thus causing the primary component to bear the unilateral magnetic pull force and its fluctuation increase. Large, which will affect the difficulty of motor assembly and affect the control accuracy of the linear motor system

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