基于Buck变换器功率因数校正电路二次谐波的抑制  

Second Harmonic Restraint of Power Factor Correction Circuit Based on Buck Converter

作　　者：李志新[1] 张国友[1] 

机构地区：[1]海军工程大学电气工程学院,武汉430033

出　　处：《舰船电子工程》2013年第3期128-130,共3页Ship Electronic Engineering

摘　　要：基于Buck变换器的有源功率因数校正电路能在实现降压功能的同时,直接实现功率因数校正,但该电路的输出电压中含有较大的二次谐波电压,通常有增大反馈带宽和串联补偿器两种抑制二次谐波电压的方法。论文在对电路产生的二次谐波电压进行深入研究的基础上,对两种方法进行了比较,得出串联补偿器能够有效降低二次谐波电压,输入电流能够很好地跟踪输入电压且无畸变,保持较高的因数的结论。Power factor correction circuit based on Buck converter can realize drop down voltage while directly power factor correction, but produce the second harmonic voltage at the same time, usually, there are two ways to restraint the second harmonic vohage, augmenting bandwidth of voltage feedback and cascade compensation. The two ways are compared based on lucubrating the second harmonic voltage pro duced by the circuit, and the conclusion was the cascade compensation can not only effectually reduce the second harmonic but also realize higher power factor.

关 键 词：Buck变化器 功率因数校正 不连续导电模式 

分 类 号：TM46[电气工程—电器]