Application Of Cell Mapping Method In Chaotic Detection Of Power Electronic Nonlinear System

In this paper, the cell mapping method is applied to the chaotic detection in the power electronic nonlinear system. Cell mapping method is one of the numerical computing technology for the global analysis of nonlinear system, and the stability of a nonlinear system can be judged by cell mapping method. As far as computational efficiency is concerned, cell mapping method has its advantages compared with the traditional chaotic method.A new mechanism of asynchronous motor chaotic detection is developed in this paper to solve the difficult problem that the weak electrical signals of a stator are difficult to measure when a motor is at a low speed. Traditional chaotic method will waste a lot of time in practice, and it is often not accurate enough, so in this mechanism cell mapping theory is introduced into the chaotic detection of speed signals. The results of experiments indicate that this way is feasible and it has smaller error than that without speed sensor.Taking double closed-loop feedback controlled Buck converter as an example, this paper also realizes the identification of the state of Buck converter system by global analysis which was based on its control model and cell mapping method. The experiment results show that the method is feasible.