What is a Linear Motor?

What is a Linear Motor?

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Principles of Linear Stepper Motor
A linear motor is a transmission device that can directly convert electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating electrical machine which is cut radially and developed into a plane. The side derived from the stator is called the primary, and the side derived from the rotor is called the secondary. In practice, the primary and secondary are manufactured to different lengths to ensure that the coupling between the primary and secondary remains unchanged over the required travel range. Linear motors can be either short primary and long secondary, or long primary and short secondary. Taking into account the manufacturing cost and operating cost, short primary and long secondary are generally used at present.

The linear motor has compact structure, low power loss, high speed and high acceleration. By directly driving the load, the linear motor can realize high-precision position positioning control in different ranges from high speed to low speed.

Features of Linear Motors
First of all, the structure is simple, and there is no need to turn the linear rotation operation into an additional device for the linear rotation operation, which greatly simplifies the structure of the platform itself, and greatly reduces the weight and volume.

Second, The positioning accuracy is high. When operating in a straight line, the linear motor can be easily and directly driven, which can eliminate various positioning errors caused by the intermediate links. Therefore, the positioning accuracy is high. If the microcomputer control is used, the positioning accuracy of the entire system can also be greatly improved.

The third is fast response, high sensitivity and good follow-up. The linear motor is easy to use the magnetic suspension to support the actuator, so that there is always a certain air gap between the actuator and the stator without contact, which avoids the contact frictional resistance between the stator and the stator, and improves the sensitivity and rapidity of the system.

Fourth, the work is safe and reliable, and the service life is long. The linear motor can easily transmit force non-contact, the mechanical friction loss is not high, the failure is few, maintenance-free, so the work is safe and reliable, and the service life is long.

Fifth, high-speed, linear motor can realize high-precision position control in different ranges from high-speed to low-speed after directly driving the load.

Applications of Linear Stepper Motor
Linear stepping motors are widely used in many fields with high precision requirements, including manufacturing, precision calibration, precision fluid measurement, and precise position movement. Such as CNC plotters, recorders, CNC plotters, CNC cutting machines, disk storage, precision positioning machines, etc. 

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