摘要
开关点预置最优正弦脉宽调制方案是以预设的最优开关点进行控制，具有总谐波含量小等优点，但缺点是开关点固定，控制不够灵活。基于DSP的数字变换器，采用开关点预置SHEPWM控制策略，并结合最优SPWM，可以实现变换器在线控制调压，由于采用了软件控制的变换器调压方案，电路较为简单。论述了SHEPWM的原理和求解方法，并对其进行了系统仿真验证。
Switching-nodes-preset optimum Sine Pulse Width Modulation(SPWM), which opetimized the switchingnodeand promoted the performance of the output votage. Because of the fixation of switching-node, system has less agility. DSP-based numeric inverter using switching-node-preset SHEPWM control stratgy and combining with opetimum SPWM realizes control of inverter on line. At the same time the system controlled by software has simple circult. This articledescribes the principle of SHEPWM, method of SHEWM equations soution and carry on simulation and verification forthe system.
出处
《电力电子技术》
CSCD
北大核心
2000年第2期19-22,共4页
Power Electronics
