September 2022, on the 11th and 13th, the real estate chamber of Commerce of the whole federation issued the notice on approval of the establishment of the group standard of the real estate chamber of Commerce of the whole federation, namely, aluminum alloy sliding door for building, and linear motor for electric doors and windows. 

      Among them, the group standard number of aluminum alloy sliding door for building is T/CRECC17 -2022; the group standard number of linear motor for electric door and window is T/CRECC18 -2022. Both standards were approved and included in the chamber's standard-setting plan. 

      As a entrusted unit, Guangdong Provincial Door Industry Association actively organized member enterprises to participate in the preparation of the standard. Now two years have passed, and the project has made real-time progress. Since the twenty-one th century, with the rapid development of linear motor technology, linear motor in the field of automatic doors and windows has been a number of practical applications. Take Guangzhou Zhuo development and sales of magnetic levitation automatic door, its working principle is 1, magnetic disk is positive and negative pole; 2, linear motor will be electric into electromagnetic, electromagnetic produce positive and negative pole band magnetic field, with magnetic disk; 3. The linear motor and the magnetic disk use the same-sex repulsion of the magnet, the opposite-sex attraction principle to push the bearing bracket to run; 4, one is the upper and lower attraction repulsive force to reduce the use of the wheel, and the other is to drive the bearing bracket around the operation of the force. 

      Kunshan Tongmao Electronics Co. , Ltd. is a manufacturer integrating linear motor, voice coil motor, linear platform development, smart manufacturing and sales. The company is committed to providing customers with linear and swing motion solutions, improve the dynamic performance of customer machines and reduce customer acquisition costs, products exported to overseas. 

        This article was originally published by Kunshan Tong Mao Electronics Co. , Ltd. (www.tmmotion.com ) .