In the elevator the transformation is not groundless, it is necessary to have these, and in the elevator using the long component aging, backward technology, function does not meet the requirements and so on related factors.

At present, the rapid development of the elevator technology, high security, high performance of the elevator products continue to emerge, not only improve the quality of life, but also for the community to create more economic benefits. However, some long service life and quality level is not high in the elevator, because of its high failure rate, poor comfort, safety and reliability is low, cannot meet the needs of the development of modern society, and become our problem. In order to prolong the service life of the elevator, and to ensure its safety and quality of operation, people will put into use after the elevator to carry out a series of services such as maintenance, repair and transformation. Some elevator big companies claim that the elevator will be in the building with the existence of a certain reason. We believe that this goal should be achieved with its subsequent maintenance, repair and transformation of the service is not open.

It is well known that the elevator is a kind of special equipment which is dangerous. In order to ensure the safe operation of the elevator, to protect people's lives and property safety, the State practices a licensing system for the production of the elevator, the elevator is managed by the Bureau of quality and technical supervision of the implementation of safety supervision system, except for the newly installed elevator inspection, in the annual safety inspection ladder implementation once a year.

Throughout the history of China's elevator development, we can see that the elevator technology in China's development is very rapid. The application of fuzzy theory, the serial communication technology and microcomputer control technology to replace the old relay contact control; VVVF application of advanced instead of backward AC-2 AC double speed drive with high efficiency; permanent magnet gearless or planetary gear transmission to replace the worm gear transmission efficiency is low; replace the traditional door machine with frequency drive door machine; replace the mechanical safety of traditional photoelectric door protection device without collision; instead do not conform to the standard angle so as to guide side rails or hollow auxiliary light rail type T. Scientific and technological progress has created a good external conditions for the transformation of the ladder, the application of these new technologies, new components need to be engaged in the transformation of the unit to carry out careful and thorough re design in order to achieve good results.