Average Current Control For Multichannel Interleaving Magnetics Buck Converter

Nowadays the world faces two major problems which are energy crisis and environmental pollution, making importance of energy saving products more and more clearly. As a power source for electronic equipment, its in-depth study and make use of sustainable which has important significance for human development.It is essential for The coupled inductor and the deepening of research for improving the stability and dynamics of the switching power supply, but also can reduce the size and weight of switching power supply, thereby greatly reducing the cost, we can see in the Interleaved Buck Converter the introduction of a technology is necessary.Firstly integrated circuits for multi-channel pay and working process Buck converter topology is analyzed to obtain a multi-channel converter equivalent steady state and transient inductance inductance expression and has been normalized inductance express its further consolidation style, and as a theoretical basis for the use of Mathcad software normalized inductor plot analysis, summarized the integrated multi-channel cross-coupling of Buck converter design rules.In the multi-channel state of the system state space averaging method to construct a mathematical model to derive the various state variables to control variable transfer function to provide a theoretical basis for further study. To further improve system dynamic performance, the paper select average current control scheme to improve the system performance to the number of channels example where n= 2 Buck converter integrated cross design based on the average current control.As the research object to analyze the working state of two channel system selected firstly, A multiple channel of systematic analysis concludes two channel state variable to the transfer function of the controlled variable.Then using MATLAB software to make the two channels under the open-loop transfer function of the Potter graph,Get the open loop system and the characteristic curve of the system to analyze.Finally take the loop characteristics under the condition of two channel opening based on average current control scheme applied system.Design on the parameters of current and voltage double closed loop.Through Saber simulation software system to join the average current control scheme for the steady performance and dynamic performance simulation,Through the experimental test of actual results and the theoretical analysis of the existence of consistency and pointed out the shortcomings and the insufficiency in the paper.