Principle

A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without the need for any intermediate conversion mechanism. It can be seen as a rotating motor split radially and unfolded into a plane.

Application:

Linear motors are mainly used in three aspects:

First, it is applied to automatic control systems, which have many applications.

secondly, it is a drive motor for long-term continuous operation;

and third, it is used in devices that need to provide huge linear motion energy in a short time and short distance.

Classification

Classification by structural form:

According to different use occasions, the structural form and distribution of linear motors are divided into:

Flat plate

U-shaped

Cylindrical

Classification according to the requirements of performance parameters in different applications:

(1) High thrust (high thrust, large displacement) linear motor: its typical application industries include high-speed, high-precision CNC machine tools, high-speed machining centers and parallel (rod mechanism) machine tools; Other high-speed, high-precision situations that require high thrust and large displacement, such as flight simulators, catapults, acceleration slides, etc.

(2) High response (high frequency response, small displacement) linear motor: Its typical application industries include various precision machine tools with high round-trip frequency, small displacement, and low thrust.

Features:

Features of linear motors:

1. Simple structure, linear drive with the minimum number of parts, so maintenance is relatively simple;

2. The stroke is theoretically unlimited, and the performance will not be affected by the change of stroke;

3. It can provide a wide speed range, from a few microns per second to several meters, ; The acceleration is large, up to 10g, which is a significant advantage over other lead screws, timing belts and rack and pinion drives;

4. The movement is stable, except for the linear guide rail or air float bearing that plays a supporting role, there is no other mechanical connection or conversion device;

5. High accuracy and repeatability, eliminating the intermediate link that affects the accuracy, the accuracy of the system depends on the position detection element, and there is a suitable feedback device that can reach the sub-micron level;