基于IR1150的单相高功率因数整流器设计与实现

设计了一种新型单相高功率因数整流器,控制电路采用基于单周期控制的电流连续模式(CCM),功率因数校正芯片IR1150作为主控芯片,无需传统功率因数校正(PFC)电路所需的乘法器、输入电压采样以及固定的三角波振荡器,简化了PFC电路的设计并缩小了装置体积。分析了系统的工作原理,对高功率因数整流器的主要模块如升压储能电感、输出电容、电流环与过电流保护、电压环与输出过电压保护、电磁干扰(EMI)滤波器和噪声干扰的抑制等进行了详细分析与设计。在升压储能电感设计中,采用了一种新型薄铜带工艺绕制的Boost储能电感,有效地减小了高频集肤效应,改善了Boost变换器的开关调制波形并降低了磁件温升。500W的样机实验表明,该高功率因数整流器设计合理、性能可靠,功率因数可达0.994。

Design and implementation of single-phase high power factor rectifier controlled by IR1150

A boost high power factor rectifier is proposed,which takes IR 1150 as its master control IC based on one cycle control in CCM(Continuous Current Mode).It does not need multiplier,AC input voltage sampler and fixed ramp oscillator,which simplifies the design of PFC(Power Factor Correction) circuit and reduces its size.The fundamental principle of the proposed rectifier is introduced.Functions of its components are analyzed in detail,such as boost inductor,output voltage capacitor,current loop and over-current protection,voltage loop and over-voltage protection,EMI filter and noise suppression.The boost inductor winding adopts thin copper tape,which effectively reduces the skin effect,improves the on-off modulating wave of the boost converter and suppresses the temperature rising of magnetic element.Experiment results of a 500 W prototype prove that the designed rectifier is rational and reliable with power factor up to 0.994.