无电流传感器的电流控制调宽式开关整流器

Current Control by a PW Modulated Switching Rectifier Instead of a Current Sensor

介绍一种新型单相开关整流器的控制方案 .它采用有源电流波形整形技术 ,控制输入电流连续导通 ,其控制开关的周期是固定的 ,导通时间的大小是根据输入电流的斜率进行调控 .它具有不需要电流传感器、线路功率因数高和电路简单等特点 .

A new plan of current control by using a single phase switching rectifier is presented. It adopts the techingue of active current wave-shaping to control continuous conduction of input current. Its switching-cycle is constant, and its conduction time is modulated according to the slope of input current. This control plan is characterized by no current sensor is needed, high in pf of circuit and simple in circuit. It has been proved by theoretical analysis and experimental results to be workable.