摘要
随着数字控制技术的不断发展,在电源变换领域涌现出许多全新的控制策略来弥补模拟控制的不足。文中采用改进的预测控制算法,不仅解决了数字控制系统难于实现高频化的问题,而且消除了输出电压纹波对控制系统性能的影响,使得系统的功率因数得到了进一步改善,采用这种控制策略,还可令系统的输出电压基本不受到负载变化的影响,输出电压的稳定性更好。使用Matlab/simulink仿真软件对整体控制系统进行了数字仿真实验,并取得了比较理想的控制效果。
With the development of digital techniques, more and more control algorithms are implemented in power electronic circuits by using digital chips, such as microprocessors or digital signal processors （DSPs）. This paper describes a modified predictive algorithm for power factor correction. The novel control scheme not only can achieve higher switch frequency which normal digital control scheme can not reach, but also eliminate affection of output voltage ripple to control loop system. With this digital control scheme we can realize higher power factor and output voltage will not change when load changes. The application efficiency is proved by the simulation experiment results.
出处
《计算机仿真》
CSCD
2007年第4期235-239,共5页
Computer Simulation
