Research On Control System Of Power Electronic Converter Based On FPGA

The power electronic converter control systems are generally based on digital signal processor (digital signal processor, DSP) or DSP and auxiliary FPGA (field programmable gate array (FPGA). In the design of some high real-time requests, the expansion is limited. The hardware parallelism inherent in FPGA can satisfy the requirement of high performance control system. The hardware resources in FPGA are rich, more suitable for the development of full digital integrated control system. However, it is difficult to develop the full digital integrated control system based on FPGA by using the direct programming method. In order to change this situation, expand the application range based on FPGA control system in the field of power electronics, the thesis researched the typical FPGA control system, depthly analysed the structure and characteristics of the system. The general design principle, design process and realization method of the control system based on FPGA are concluded.It is the main reason for its application in the field of high performance that FPGA special hardware architecture determines the high real-time performance. In the paper, the structure and characteristics of FPGA and DSP are summarized, the operation mechanism of the two parts is analyzed, and the selection principle of the controller is summarized in different application occasions. Through the typical FPGA system application example, the essential characteristic of FPGA is expounded, and the unique advantages of the FPGA chip using the platform controller are demonstrated.The general design principle is key to improve the design efficiency. The design of the control system needs the hardware platform and software design principles. The design principles can be used to speed up the development of FPGA control system. By analyzing the characteristics of typical power electronic control system, this paper summarized the general design principles of FPGA power electronic digital control system, such as modularization, normalization, series parallel control and so on. By using these general design principles, the reusable modules are designed, which can simplify the complex system, improve the design efficiency and save the debugging time.Efficient visualization of the design process is a convenient way to achieve full digital integrated control system. The development of FPGA control platform not only needs master the HDL language, but also have rich professional knowledge, so the design is difficult, long development cycle; Unified reusable IP cores are less, stable and reliable design of control system is much more difficult. Based on the research and design of the FPGA power electronic converter control system at home and abroad, explored to use a EDA tools. realize the design process of FPGA power electronic converter control system, reduce the difficulty of development, shorten the development cycle, save development costs.Platform level verification is the ultimate goal of the research. Main circuit part of the platform is made of six IGBT. which consists of two level and three phase bridge circuit and driven by TX-DA962D driving plate.The control part is mainly composed of Xilinx VIRTEX-4-XC4VSX35 chip. Based on the normalization of the module library, the design process uses a graphical integrated flow in MATLAB/System generator environment. Building and jointing simulation system control model,which is composed of two level SVPWM IP core and three-level SVPWM IP core, and then converted into Xilinx plan ahead project file, realized the model to the seamless connection of the project file. After comprehensive analysis process, generates a binary file, complete culminating system verification in the platform.The general design principle, flexibly using the design tools to achieve seamless design flow, the rapidly completing the system level design, explored the efficient and convenient implementation scheme based on FPGA full digital control system.All do these are to lay a solid foundation for the FPGA control system in-depth research and development.