基于DSP的高功率因数移相全桥软开关数字电源研究与设计

【作者】 王海波；

【导师】 申群太；

【作者基本信息】 中南大学 ， 控制科学与工程， 2011， 硕士

【摘要】 随着社会的不断发展和进步,开关电源以其高性能、高效率、高功率密度等优点,已经取代了传统的线性调整器电源,成为电子设备中电源系统的首选。同时,新材料、新技术等的发展,推动着开关电源朝着高频化、数字化、分布式电源系统、系统集成等方向发展。本文以设计指定性能指标的全数字高功率因数软开关AC/DC通信开关电源为背景,研究开关电源的功率因数校正、软开关实现、磁性元件设计、单周期控制与模糊控制的数字化实现等相关技术。该电源为两级结构,前级完成功率因数的校正和输入单相交流电压的逆变,以Boost有源功率因数校正电路为主电路拓扑；后级则为主功率变换级,以移相全桥ZVS-PWM DC/DC变换器为主电路拓扑。控制器统一由TI公司的DSP芯片TMS320F2812来完成,考虑到DSP控制芯片的信号处理速度和算法实现的优势以及开关变换器非线性、时变的特点,前级采用单周期控制,后级采用模糊自适应PID控制。论文通过理论分析详细论述了该系统前级和后级的主电路和控制电路的整个设计过程,其中包括总体方案选择,各级主电路拓扑的选择、原理分析、器件参数计算和选择,单周期控制Boost APFC电路和模糊自适应PID控制的移相全桥ZVS-PWM DC/DC变换器的数字化实现、电路参数设计和模糊自适应PID控制优于传统PID控制器的Matlab仿真验证以及TMS320F2812DSP数字PWM信号和移相脉冲的产生策略等。更多还原

【Abstract】 Now with the social develops and advances constantly, switching power supply has replaced the conventional linear regulator power supply and become the first choice of the power supply system in electronic devices. At the same time, development in new material, technology and other areas promotes switching power supply developing towards high frequencies, digital control, distributed power systems and system integration, etc.In this paper, the design of specified performance all-digital high power factor soft-switching AC/DC communication switching power supply is the background. And the related technologies are researched,such as switching power supply power factor correction, soft-switching implementation, the magnetic component design, the digital implementation of one-cycle control and fuzzy control, etc.The power supply is composed of two-stage structure, the function of the first stage is to complete the input power factor correction and inverter single-phase AC voltage to Boost the main active power factor correction circuit topology; and the latter stage is the main power conversion stage.The phase-shifted full bridge ZVS-PWM DC/DC converter-based topology. TI’s TMS320F2812 DSP is the controller chip.For taking the speed of the signal processing and algorithm implementation of the DSP chip into account,the first stage uses one-cycle control and the post-stage uses fuzzy-PID control.In this paper, the entire design process of the before and after main circuit and control circuit is discussed in detail by theoretical analysis, including the choice of overall scheme and main circuit topology、the analysis of theory、the calculation and selection of device parameters, the digital implementation of one-cycle control of Boost circuit and fuzzy-PID control of phase-shifted full-bridge ZVS-PWM DC/DC converter, the Matlab simulation verifying of the advantage of the fuzzy-PID control relative to traditional PID control、the generation strategies of digital PWM signal and phase angle signal of TMS320F2812 DSP.更多还原