Linear motor drive technology has been more and more mature since its birth and development. It is widely used in various fields because of its outstanding advantages such as high precision, no wear, low noise, high efficiency, fast response and space saving. Linear motor has been widely used in civil, industrial, military and other industries.

1. In the transportation industry

In 2002, China successfully produced a maglev train driven by linear motor, which adopts a new shape curve and streamlined front wall of bullet. The vehicle is 15 meters long, 3 meters wide, 20 tons empty weight, 44 seats, and can carry 100 people. The heavy load of Zui is 16 tons. The design speed is 150 km / h and the test speed is 80 km / h. China has become one of the few countries that master the magnetic levitation technology.

2. In the construction industry

For example, linear motor driven elevators are widely used in intelligent buildings. The * elevators driven by linear motors in the world were installed in the Wanshi building, guama District, Tokyo, Japan in April 1990. The load of the elevator is 600kg, the speed is 105m / min, and the lifting height is 22.9m. Because the elevator driven by linear motor has no traction unit, the machine room on the top of the building can be omitted. If the height of the building is increased to about 1000 meters, it is necessary to use the elevator without wire rope. This kind of elevator is driven by linear motor of high temperature superconducting technology, the coil is installed in the shaft, and the car is equipped with high-performance permanent magnet materials.

Linear motor elevator

3. In the semiconductor industry

Linear motor with its high speed, high precision, pollution-free features, is widely used in lithography, IC bonding machine, IC molding machine and other processing equipment, and a single device often requires multiple linear motors.

Structure of lithography machine

4. In the medical industry

Linear motor is also emerging, ranging from electric nursing bed, X-ray fluoroscopy bed, electric operating table to cardiac pacemaker.

5. In the numerical control processing industry

The traditional "rotary motor + ball screw" transmission mode can achieve a high feed speed of 30 m / min and an acceleration of only 3 M / 2 s. The linear motor drives the worktable, the speed is 30 times of the traditional transmission mode, the acceleration is 10 times of the traditional transmission mode, and the Zui is up to 10g; The stiffness is increased by 7 times; There is no reverse dead zone in the table driven directly by linear motor; Because of the small inertia of motor drive, the linear servo system can achieve high frequency response

6. In the military industry

The IEEE society of electrical and Electronic Engineers (spectrum online) reported on November 12, 2004 that the United States has begun to test two systems that revolutionize the way aircraft carriers eject aircraft. The heart of electromagnetic aircraft ejection system is a 103 meter long linear induction motor. Electromagnetic aircraft ejection system has better performance and ejection control range, which is suitable for a wide range of ejection aircraft. The weight of the accelerated aircraft is about 4.5-45 tons, the ejection speed is between 100-370 km / h, and the control sensitivity is flexible, which can not be achieved by the steam catapult

In recent years, the application of linear motor has shown an accelerated growth trend. The application of linear motor is extensive, and has penetrated into various fields of economic development. With the improvement of linear motor drive technology, linear motor will gradually replace the traditional screw drive in the future. Therefore, we must gradually improve the use and maintenance of linear motor and other supporting technologies to meet the changing market needs and increase our market competitiveness.