A three-degree-of-freedom linear electromagnetic actuator

Abstract

The invention belongs to the field of actuators, and concretely discloses a three-degree-of-freedom linear electromagnetic actuator. The actuator includes four actuator stator units having the same structure, an actuator mover, and three displacement sensors. The four actuator stator units are symmetrically distributed on the upper side, the lower side, the left side and the right side of the actuator mover respectively. Each actuator stator unit includes a rectangular stator iron core, a rectangular permanent magnet, two C-shaped stator iron cores, and two excitation coils. The rectangular stator iron core is bonded to the S pole of the permanent magnet, and the two C-shaped stator iron cores are symmetrically arranged on the two sides of the permanent magnet. The actuator mover includes a crossed mover iron core, and the four ends of the iron core are inserted into groove-shaped structures of the four actuator stator units respectively. The three displacement sensors are arranged on the actuator stator units, and are used for measuring displacement of the actuator mover. The three-degree-of-freedom linear electromagnetic actuator effectively solves the problem of non-linearity of electromagnetic force output of an actuator, and has the linear output characteristics and multi-freedom driving capabilities.

Description

technical field [0001] The invention belongs to the field of electromagnetic actuators, and more specifically relates to a three-degree-of-freedom linear electromagnetic actuator. Background technique [0002] A boring tool is a tool used to process a long hole on a workpiece. It generally has a slender structure. The slender boring tool often produces severe vibrations due to its low rigidity during processing, which affects the processing of the workpiece. precision and surface roughness. In order to avoid the vibration of the boring tool, passive vibration reduction is generally adopted, but the vibration reduction effect obtained by the passive vibration reduction method is relatively limited. [0003] In order to better suppress the vibration generated by the slender boring tool during machining, it is necessary to adopt an active vibration control method to improve the dynamic characteristics of the tool or workpiece, such as setting an actuator suitable for the borin...

AI Technical Summary

Problems solved by technology

However, currently there are few actuator products suitable for vibration control of boring tools on the market. As an actuator product used to control the vibration of boring tools, electromagnetic bearings can be installed on boring tools, but their electromagnetic force output is very low. Linear, and does not have the ability to control torsional vibration

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