开关型功率变换器的控制  

Control of Switched Power Converters

作　　者：蔡宣三[1] 

机构地区：[1]清华大学,北京100084

出　　处：《电源世界》2002年第6期56-63,共8页The World of Power Supply

摘　　要：开关型功率变换器的传统控制方式是电压型控制。输出电压信号与给定值比较,通过脉宽调制电路产生占空比脉冲,驱动功率开关。占空比的调制方向是减少电压误差,实现负反馈控制。前馈是一种开环补偿技术。电流型(双环)控制已广泛应用于开关稳压电源。近年开发或应用的新技术还有:电荷控制、单周控制等。磁调节器控制多路输出开关电源的非主要输出,也称后置调节器。In conventional voltage-mode control (a single loop) of the switched power converters(SPC) the output voltage signal is compared with the reference to produce a duty ratio pulse by a PWM driving the power switch.The duty ratios modulated in the direction to reduce the voltage error,so it is called the negative feedback control.The feedforward is an open loop compansating technique.Two loop control has become widely used in SPC with the current-mode control.The new control techniques namely:charge control and one-cycle control are developed or employed recently.The magnetic regulator using in controlling the non-main output voltage of the multi - output SMPS is a post-regulator.

关 键 词：单环反馈控制 电压型 电流型 双环 前馈 电荷控制 单周控制 磁调节器 

分 类 号：TM46[电气工程—电器]