Combination low-cogging force permanent-magnet linear motor and implementation method thereof

Abstract

The invention discloses a combination low-cogging force permanent-magnet linear motor and an implementation method thereof. The linear motor comprises a primary and a secondary, wherein the primary comprises a primary iron core and an armature winding, the armature winding is wound around primary iron core teeth, the secondary is formed by tightly assembling at least one group of master secondarymodule and slave secondary module, a single secondary module comprises a permanent magnet and a secondary yoke plate, the numbers of permanent-magnet poles in the single secondary module are same, andthe widths of permanent-magnet poles in each secondary module are different. Cogging forces of the master secondary module and the slave secondary module are positive values at a front half period and are negative values at a rear half period, a cogging force of the slave secondary module is a negative value at the front half period and positive value at the rear half period, the cogging force generated by the master secondary module and the cogging force generated by the slave secondary module are highly complementary in waveform, and the master secondary module and the matched slave secondary module are combined in a block way along a secondary moving direction. The linear motor has the beneficial effects that the total cogging force of the combined motor can be remarkably reduced, andthe utilization rate of the magnet is not reduced.

Description

technical field [0001] The invention belongs to the field of linear motors, and more specifically relates to a combined low cogging force permanent magnet linear motor and its realization method. Background technique [0002] Permanent magnet linear motors have the advantages of high thrust density, fast response speed, and high positioning accuracy, and have broad application prospects in linear motion occasions such as vertical lifting systems, transportation, and precision machining. When linear motors are used in occasions requiring large thrust, generally multiple unit linear motors are combined and installed along the direction of motion. According to the arrangement, they can be divided into single-sided and double-sided structures. Iron core, it can be considered that the total output thrust of the motor in this application is the sum of the output thrusts of the motors of each unit. After the modular combination of unit linear motors, although the superposition of ...

AI Technical Summary

Problems solved by technology

Its purpose is to solve the technical problem that the cogging force is doubled and the cogging force is large when the existing permanent magnet linear motor is used in combination, and it is not limited by the cooperation of the slot and pole, and can significantly reduce the cogging force of the permanent magnet linear motor , while not reducing the utilization rate of permanent magnet materials

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