基于电流跟踪控制的新型负载相位调节器

A Novel Load Phase Regulator Based on Current Tracking Control

对负载相位调节器进行了深入研究,包括其主电路工作原理和控制方法.采用AC/DC桥式变流为主电路结构,提出了一种电压外环、电流内环的双闭环控制策略,同时使输入电流跟踪预先给定的正弦波,以保证输出电压的稳定性.给出了主电路中电感和电容取值范围的估算方法,并分析了电流跟踪控制的开关管工作频率的数值算法.最后通过仿真验证了系统的可行性和准确性.

This paper presents a kind of single-phase PWM rectifier based on current tracking control. According to the operation principle of the main circuit, a new control strategy is proposed. With an inner hysteresis current-loop and an outer vohage-loop control,the stability of the output voltage can be improved and the phase difference between the input voltage and current can be controlled as expected. On this basis,the choice of some important parameters in circuit design is put forward. The formula of switching frequency are derived by analyzing the principle of hysteresis comparison control. At the end of the paper,some simulation results are presented,which shows the feasibility and accuracy of the design.