Research Of Digital-control Resonant Current Source Applied In A High-voltage Insulation Distributed Power Supply

This project focuses on digital-control resonant current source applied in a high-voltage insulation distributed power supply. It is a distributed power system, based on the AC current bus, capable of working for high-voltage isolation purpose and applied to power systems and high-power power electronics devices. This paper introduces the application situation and relative research works of the converter, different type's modulation methods for series resonant current source, the advantages of these methods and existing relative research results. Considering all of these, the main purpose of this research is developed, mainly focuses on the following three aspects.First, characteristics and optimization of the application and design method applying two kinds of typical modulations in the resonant current source is obtain after the analysis of two modulations based on time domain, frequency domain and state plane diagram. It's verified by prototypes and comparisons in the experiments.Second, the paper analyzes and compares the advantages and disadvantages of various modulations based on state plane diagram, harmonics and efficiency. The optimal modulation for series-resonant current source modulation is obtained after a comprehensive comparison.Third, in order to realize digital control in this program, design and implement of the Ti latest floating-point DSP control platform, also build digitally-controlled current source prototype, design control timing and protection.This paper introduces and analyzes the core parts of the program in detail, gives the specific parameters and the experimental results, Implement a series of optimization measures and basically achieves the requirement of industrial use.