Intelligence Control And Date Communication Technology For Compound AC Contactor

AC contactor is a wildly used switch apparatus. Its performance has direct correlation not only with the economic interest, but also with energy consumption of state electric power system. Along with the development of technology, the mechanical life of AC contactor has reached to 15 million times. But the electric life of AC contactor is only about 10% of its mechanical one. This is to say the electric life of main contact has become the key factor to restrict the AC contactor progress. In some particular working conditions, such as AC-4, contact erosion occurs commonly in the making process. This situation brings higher requests in technology level. In order to reduce the contact electrical erosion, it requires us to analysis the whole process, achieve the optimal control of AC contactor, reduce the contact collision, and realize arcless divide-shut brake in the meantime. Along with the diminution of physical resources, the society brings higher requests to AC contactor in energy-saving.This article analyzes and investigates the intelligent control and design technology of AC contactor penetratingly. This article mainly divided the following apartments to analyze:Firstly, propose the non synchronous structure of AC contactor and inset the single chip technology to the AC contactor system, in order to bring out contactor intelligent and analyze the running process of it; Secondly, investigate the dynamic characteristic of AC contactor in different conditions, which are different exciting voltage, different best closing making angle and different process control. Then find the optimal control proposals to remove contact bounce and reduce magnet core strike through the study. In this way we can increase the performance index and using life of AC contactor. Subsequently, analyze the main influence factor about zero-current-off control. In the base of studying on intelligent AC contactor, develop the prototype based on CJ20-25 contactor. Finally, use CAN in the AC contactor, and study the data communication technology of AC contactor.