Research on delay-dependent stability of parallel DC-DC converter system based on a Wireless communication

The current-sharing technology based on Wireless communication allows the current of DC-DC parallel system to be divided equally very well. However, the information transmitted by the network inevitably exist a transmission delay, which makes the traditional system into a time-delay systems. This paper presents a method to compute the Critical Delay of a DC-DC Parallel delay system. The method uses frequency-domain techniques and the DC-DC Parallel System linearized average model to obtain the critical delay. Then a Simulation Model with two parallel modules was built. And the main circuit of the modules is BUCK converter. Finally using the MATLAB simulation tools, we demonstrate the correctness of the method.