摘要
单相Boost PFC整流器在输入电压频率较高时,输入电流过零将产生畸变。本文分析了单周期控制BoostPFC电路电流环输入导纳模型,指出电流环等效功率级为一阶系统,且其输入导纳在低频段呈纯阻性,在1kHz左右才开始呈现容性,使得输入电流超前于输入电压。因而其在航空400Hz及360～800Hz交流系统中不存在明显过零畸变,合适作为航空电源前级变换器。
Input current distortion in the vicinity of input voltage zero crossing of boost single phase power factor corrected （PFC） rectifier in high line frequency occurs. Current loop model and input admittance model of one cycle control PFC boost rectifier is presented. It is pointed that its equivalent power stage of current loop is a 1 s, order system, and its input admittance is pure resistive in low frequency domain and capacitive since 1 kHz around, then input current phase leads occurs. However, it is does not matter in aero ac power system with 400Hz or 360 - 800Hz line frequency, and is suitable for applications as front converter in aero power supply system.
出处
《电测与仪表》
北大核心
2011年第2期26-30,共5页
Electrical Measurement & Instrumentation
关键词
单向PFC
电流过零畸变
单周期控制
输入导纳
single phase PFC, current zero -crossing distortion, one cycle control, input admittance
