基于DSP控制的移相全桥ZVS变换器研究与设计

发布时间：2018-04-16 07:41

本文选题：DSP控制器 + 软开关技术　；参考：《南京理工大学》2014年硕士论文

【摘要】：随着电子技术的快速发展,电源系统的性能需要不断提高,因此数字化和软开关技术成为开关电源的发展热点。本文将软开关技术与数字化相结合,设计实现了基于MC56F8013芯片的移相全桥ZVS变换器。首先,本文介绍了开关电源的发展趋势、常见拓扑以及数字开关电源的特点,提出了数字化移相全桥ZVS变换器的设计方案。之后,分析了移相全桥ZVS变换器的控制方式和工作模态,研究了占空比丢失和滞后臂软开关等难题。再次,本文设计了移相全桥ZVS变换器的硬件电路和控制程序。硬件设计包括主电路功率器件选型、磁性元件设计、采样电路设计及驱动电路设计等。同时,基于控制芯片,研究了移相角生成策略,运用状态空间平均法对移相全桥ZVS变换器进行小信号建模分析,设计PI调节器,最终,根据设计要求编写程序流程图,完成软件设计。最后,基于MATLAB软件,对移相全桥ZVS变换器进行仿真研究,结合实际情况,给出多种仿真波形。同时,设计出基于MC56F8013芯片的500W移相全桥ZVS变换器样机,并对样机实验波形及测试数据进行详细分析,最终验证了移相全桥ZVS变换器设计的正确性。
[Abstract]:With the rapid development of electronic technology, the performance of power supply system needs to be improved constantly, so digital and soft switching technology has become a hot spot in the development of switching power supply.In this paper, a phase-shifted full-bridge ZVS converter based on MC56F8013 chip is designed and implemented by combining soft switching technology with digitization.Firstly, this paper introduces the development trend of switching power supply, common topology and characteristics of digital switching power supply, and puts forward the design scheme of digital phase-shifted full-bridge ZVS converter.Then, the control mode and working mode of phase-shifted full-bridge ZVS converter are analyzed, and the problems such as duty cycle loss and soft switch of hysteresis arm are studied.Thirdly, the hardware circuit and control program of phase-shifted full-bridge ZVS converter are designed.Hardware design includes main circuit power device selection, magnetic element design, sampling circuit design and drive circuit design.At the same time, based on the control chip, the phase shift angle generation strategy is studied, and the state space averaging method is used to model and analyze the phase-shifted full-bridge ZVS converter, and Pi regulator is designed. Finally, the program flow chart is written according to the design requirements.Complete software design.Finally, based on the MATLAB software, the simulation of phase-shifted full-bridge ZVS converter is carried out. Combined with the actual situation, various simulation waveforms are given.At the same time, the prototype of 500W phase-shifted full-bridge ZVS converter based on MC56F8013 chip is designed, and the experimental waveform and test data of the prototype are analyzed in detail. Finally, the correctness of the design of phase-shifted full-bridge ZVS converter is verified.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

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