Primary permanent magnet linear motor actuator

Abstract

The invention discloses a primary permanent magnet linear motor actuator. The primary permanent magnet linear motor actuator comprises a driving shaft, a secondary mover convex tooth block, a secondary mover channel block, primary stator iron cores, an armature winding and a permanent magnet body, wherein a secondary mover of a primary permanent magnet linear motor is arranged on a driving shaft and consists of the secondary mover convex tooth block and the secondary mover channel block arranged in the axial direction of the driving shaft at intervals; four primary stators of the primary permanent magnet linear motor are separately and symmetrically arranged on the outer side of the driving shaft; each of the primary stator comprises two primary stator iron cores; each of the primary stator iron cores is provided with a plurality of stator channels; each of the stator channel comprises a large stator channel and a small stator channel; and the large stator channels and the small statorchannels are arranged at intervals. Through creative proposal of a four-sided tubular structure, the pushing force density and the power density of the actuator can be improved, so that the driving shaft of the actuator has a simple structure and is high in robustness; and through arrangement of a built-in water cooling pipeline, the heating effect is reduced.

Description

technical field [0001] The invention belongs to the field of linear actuators, in particular to a primary permanent magnet linear motor actuator. Background technique [0002] The linear motor can directly output electromagnetic thrust to realize linear motion, thus greatly simplifying the mechanical structure of the linear actuator. The existing permanent magnet synchronous motor combined with advanced power conversion devices can obtain high-speed, precise and controllable driving performance. However, since the permanent magnet is placed on the drive shaft, it is easy to cause damage to the permanent magnet in high-speed, impact-resistant applications. In addition, when the actuator operates at high frequency and continuously, the temperature rise effect has a greater impact on the output performance of the motor, which can easily overheat the permanent magnet and cause irreversible demagnetization, and the armature coil is easy to burn out. [0003] In view of the abov...

AI Technical Summary

Problems solved by technology

However, since the permanent magnet is placed on the drive shaft, it is easy to cause damage to the permanent magnet in high-speed, impact-resistant applications

In addition, when the actuator operates at high frequency and continuously, the temperature rise effect has a greater impact on the output performance of the motor, which can easily overheat the permanent magnet and cause irreversible demagnetization, and the armature coil is easy to burn out

Images