摘要
本文介绍了一种基于数字信号处理器(DSP)的移相调频(PSFV-PWM)控制逆变电源,给出了主电路拓扑结构,分析了其控制原理并设计了控制程序流程,新颖的移相调频控制能够实现输出电压90%的调整率,输出电流波动小于单纯移相调功PWM方式,并在轻载时保持连续。实现了功率开关器件的ZVZCS(零电压零电流通断)软开关,有利于进一步提高开关频率和降低开关损耗。DSP采用高性能的专用数字信号处理芯片TMS320F2812,实现了系统的数字控制,满足了系统控制的灵活性和实时性,减小了系统的体积和生产成本。仿真分析和实验结果证明了此控制模式的可行性与合理性。
An inverter power supply of phase-shifted and frequency-varied PWM(PSFV-PWM)control based on DSP is introduced in this paper.The main circuit is presented and analyzed,and program flow chart is also designed.The novel phase-shifted and frequency- varied control method can realize 90% adjustment rate of the output voltage.Composed with conventional PS-PWM.the amplitude changes of load current are lower and the output current is easier to keep continuous on the condition of light load.The ZVZCS soft switch mo...
出处
《电源世界》
2007年第8期19-22,共4页
The World of Power Supply
关键词
DSP
移相调频
逆变电源
功率控制
DSP
phase-shifted and frequency-varied
inverter
power control