随着现代化工业设备投入使用，用户对电源系统的性能提出了更高的要求，传统的模拟控制技术已不能满足现代工业的需求，取而代之的采用数字控制技术。数字控制技术可以完成复杂的控制算法，提高精确度，进行智能化设计等，而且已成为目前发展的主流方向，本文就是一种基于数字控制的电源系统。 本文首先介绍了逆变电源的发展现状以及设计的意义，并针对SPWM波三种调制技术和生成方法，在其理论分析的基础上，搭建了Simulink仿真模型，最终选择了双极性调制方式和不对称规则采样法；然后根据逆变电源的设计指标要求，设计了主电路，包括功率开关管的选取、高频变压器的设计、滤波电路和吸收电路设计等。同时还基于逆变电源的数学模型选择了数字PID算法和电压瞬时值内环和电压有效值外环的双闭环控制策略，并利用Simulink仿真环境对开环控制、电压瞬时值单闭环控制以及电压瞬时值和电压有效值双闭环控制进行仿真分析，仿真结果表明双闭环控制策略能够很好地实现设计要求；最后设计了基于DSP芯片TMS320F28335逆变电源的控制系统，包括推挽控制电路、逆变驱动电路和采样电路等硬件电路设计和软件设计。 本文最后利用芯片TMS320F28335作为主控制器搭建了实验平台，对设计进行实验验证，并给出结论分析，实验结果表明设计可以达到预期要求。

With the development of modern industrial equipment put into use, users put forward higher requirements about the performance of the power supply system, the analog control technology has been unable to meet the requirements of modern industry, the digital control technology replace it. The control of digital can be applied to complete the complex control algorithm, improve the precision and intelligent design, and has become the main direction of the current development. This paper is based on a power system digital control. First, this paper introduces the current development of inverter power supply and the significance of this paper design, for three kinds of SPWM modulation technology and methods of the generation of SPWM wave, on the basis of theoretical analysis, built the Simulink simulation model for analysis, and ultimately chose the bipolar modulation mode and asymmetry regular sampling method; Then according to the requirements of the inverter power supply design, this paper designs the main circuit, including the design of the power switch, design of high-frequency transformer, filter circuit and the snubber circuit and the like. as the same time, based on the mathematical model of the inverter circuit, this paper chose Digital PID control algorithm and the instantaneous voltage inner and voltage RMS outer loop double-loop control strategy, and the open-loop control, the instantaneous value of the single-loop control voltage and instantaneous voltage and RMS voltage double-loop control simulation are analyzed by Simulink simulation environment, the simulation results show that the dual-loop control strategy can achieve a good design requirement; finally, based on DSP chip TMS320F28335 design the inverter control system, including a push-pull control circuit, inverter drive circuit and sampling circuit hardware circuit design and software design. Finally, using the chip TMS320F28335 as the main controller build an experimental platform for design experiments, and conclusion and analysis are given, the experimental results show that the design can achieve the desired requirements.