C-shaped tooth permanent magnet linear motor with double-stator arc-shaped and auxiliary groove mixed structure

Abstract

The invention discloses a C-shaped tooth permanent magnet linear motor with a double-stator arc-shaped and auxiliary groove mixed structure, and the permanent magnet linear motor comprises a housing, an output shaft is slidingly disposed in the housing, an inner stator is fixedly disposed in the housing, the inner stator sleeves the output shaft, a support ring is disposed on the output shaft, and a rotor iron core is disposed on the support ring. A first permanent magnet and a second permanent magnet that are symmetrically distributed are arranged in the rotor iron core, an outer stator is fixed on the inner wall of the housing, and an armature winding is arranged in the outer stator; the rotor of the permanent magnet linear motor is of a three-permanent-magnet structure, and compared with a traditional single-permanent-magnet structure, the larger output force is provided; compared with a traditional double-stator motor, three auxiliary grooves are formed in the inner stator, the length of the inner stator is shortened, the total mass of the motor is reduced, the material cost of the motor is reduced, and the power density of the motor is improved; compared with a motor with an unoptimized inner stator, the positioning force of the motor is greatly reduced, and meanwhile, the motor has a longer effective stroke.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a C-shaped tooth permanent magnet linear motor with a mixed structure of double stator arcs and auxiliary slots. Background technique [0002] The traditional compressor drive technology mostly uses rotating motors to connect cranks and shafts, ball screws and other driving methods. Due to mechanical friction and energy transmission during the transmission process, the efficiency is low, and the complex mechanical structure also reduces the reliability and reliability of the system. Increased maintenance difficulty. The linear motor saves the complicated mechanical structure in the compressor because of its unique motion mode, which not only reduces the cost, simplifies the system structure, but also increases the reliability and efficiency of the system. [0003] Among the linear oscillating motors, the permanent magnet linear oscillating motor has been widely concerned and used...

AI Technical Summary

Problems solved by technology

When the motor uses a single permanent magnet as the mover, the mover inertia is small, and the positioning force can be ignored within the effective stroke, but the shortcomings of its relatively small output force and the effective stroke being limited by the axial length of the motor cannot be ignored.

When using three permanent magnet structures, although the output force has been greatly improved, the larger positioning force affects the quality of the output force and increases the difficulty of motor control.

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