Analysis of Linear Module and Linear Motor

Linear Motor, also known as linear motor. A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism.

The difference between Linear Module and linear motor:

Linear modules are different from linear motors. They are all automatic transmission elements, which can realize linear motion. They all assemble various parts on aluminum profiles and add cover plates, which look similar in appearance.

1. The difference between the principle of linear motion.

Although similar in appearance, the principle of linear motion is different. The linear motor directly converts electrical energy into mechanical energy, and linear motion does not require an intermediate mechanism, and the linear module needs to convert curved motion into linear motion.

2. Poor accuracy.

The accuracy of the linear motor is higher than that of the linear module. The linear motor has a simple structure, and the linear motion does not need to go through an intermediate conversion mechanism. The motion inertia is reduced, the dynamic response performance and the positioning accuracy are greatly improved, and the accuracy of the linear motor can be achieved, and the accuracy of the linear module is generally around.

3. Poor speed.

Linear motors have great advantages in terms of speed. The speed of the linear motor is 300m/min; the acceleration is 10g. The speed of the ball screw is 120m/min; the acceleration is . Compared with speed and acceleration, the linear motor has considerable advantages. After successfully solving the heating problem, the speed of the linear motor will be further increased, but the speed of the rotary servo motor + ball screw is more limited, and it is difficult to increase it again. In terms of dynamic response, linear motors have advantages due to motion inertia, backlash, and mechanism complexity.

In terms of speed control, the linear motor responds faster and has a wider speed regulation range, reaching 1:10,000. It can reach high speed when starting, and can quickly stop when running at high speed.

4. Poor noise.

The noise of the linear motor is less than that of the linear module, because the linear motor has no centrifugal force constraint, there is no mechanical contact during movement, and there is no friction and noise. The transmission parts have no wear, which can greatly reduce the mechanical loss and avoid cable dragging. cable. Noise caused by gears and pulleys to improve overall efficiency.

5. Price difference.

The performance of linear motors is higher than that of linear modules in all aspects. Therefore, in terms of price, linear motors are more expensive, usually several times more expensive.

The above are the main differences between linear modules and linear motors. Of course, aside from these differences, the drives come with different equipment. Linear modules are controlled by servo motors or stepper motors, and the linear motor itself is the driving device.

So how to choose between the two? According to the different characteristics of linear electric and linear modules, you can refer to the following options:

1. Generally, customers with small force, long stroke and high precision requirements can choose to use linear motors;

2. For customers with large force, short stroke and high precision requirements, the lead screw linear module can be selected;

3. For customers with general force, long stroke and low precision requirements, the Synchronous Belt Linear Module can be selected.