Linear motor

Abstract

The invention relates to a linear motor, and aims to provide a linear motor which is high in structural rigidity, large in thrust density, small in thrust fluctuation, sound in dynamic response and high in heat dissipation capacity, can meet the high-precision application requirement and can also be suitable for high-load application occasions. The linear motor comprises a primary part and a secondary part, and there is an air gap between the primary part and the secondary part; the primary part comprises a primary bottom plate and a primary winding, and the primary winding is fixedly mounted at one side or two sides of the primary bottom plate and is encapsulated through heat-conducting insulating curing glue.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a linear motor. Background technique [0002] Linear motors are being used more and more widely due to their advantages such as simple structure, high positioning accuracy, easy adjustment and control, and high acceleration. At present, commonly used linear motors are divided into iron-core linear motors and iron-less linear motors. Iron-core linear motors have the characteristics of low cost, good heat dissipation, high thrust and high rigidity, but affected by the cogging effect, the cogging force and thrust fluctuations are large, the dynamic response is poor, and high motion accuracy cannot be achieved; although ironless linear motors have no cogging effect, the existing ironless linear motors mostly rely on the heat dissipation capacity of the motor body, and it is difficult to achieve better The cooling effect cannot be obtained, and higher motor power cannot be obtained, a...

AI Technical Summary

Problems solved by technology

At present, commonly used linear motors are divided into iron-core linear motors and iron-less linear motors. Iron-core linear motors have the characteristics of low cost, good heat dissipation, high thrust and high rigidity, but affected by the cogging effect, the cogging force and thrust fluctuations are large, the dynamic response is poor, and high motion accuracy cannot be achieved; although ironless linear motors have no cogging effect, the existing ironless linear motors mostly rely on the heat dissipation capacity of the motor body, and it is difficult to achieve better The cooling effect cannot be obtained, and higher motor power cannot be obtained, and it cannot meet high-load applications.

At the same time, the primary coils of existing iron-core linear motors mostly use enameled wire structures or printed circuit board structures. The forming process of enameled wire coils is complicated, the structure has low rigidity, and poor consistency. In addition, the equivalent air gap of the motor corresponding to the two coil structures is large, the thrust density of the motor is small, and the efficiency is low, and it cannot be applied in the field of high load and high acceleration.

Images