基于DSP三环控制的逆变电源的设计  

Design of three-loops control for inverter based on DSP

作　　者：赵佳[1] 沈颂华[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《机电工程》2008年第2期80-82,共3页Journal of Mechanical & Electrical Engineering

摘　　要：针对逆变电源输出电压波形畸变并且在大功率负载下输出电压掉压严重的问题,提出了采用电压有效值外环、电容电压环和电感电流内环的三环控制策略,选用TI公司的DSP TMS320F2812芯片实现了三环的控制算法,并且给出了程序流程图以及逆变电源的详细设计过程。在理论分析和仿真的基础上设计了一台采用单极性倍频SPWM调制的6 kVA/50 Hz/220 V逆变器,并进行了实验。实验结果显示,所采用的三环数字化控制方案能达到"逆变电源带大功率负载"条件下较优的动态、稳态特性。Aimed at the voltage wave distortion of inverter and the reduction of output voltage magnitude when the load is heavy, a design of the inverter power supply which uses the three-loop control with the effective value outer loop, the output voltage loop and the inductance current inner loop was introduced. DSP TMS320F2812 produced by TI corporation was selected to carry out this scheme, the program flow chart and the process of inverter design were presented. A SPWM inverter （6 kVA/50 Hz/220 V ） based on the simulation and experimental course with the parameters was designed, the results demonstrate the parameters selection is precise and the applied method actualized by DSP has nicer dynamic and steady characteristic when the inverter power is worked in the condition of heavy load.

关 键 词：逆变器 数字信号处理 三环控制 

分 类 号：TM464[电气工程—电器]