一种无需输入电压检测的单相有源PFC的研究

Research on A Single-Phase Active PFC Without Input-Voltage Sensor

单相有源PFC的两个控制目标是单位输入功率因数和低纹波输出电压,从控制角度和保护角度需要检测输入交流电压、电感电流和输出电压,但是有些控制算法无需全部检测输入电压、电感电流或输出电压。对一种无需输入电压检测的单相PFC控制原理进行了理论分析,利用MATLAB/SIMULINK进行了仿真分析,并基于DSP TMS320F28335进行了实验研究。所得结果相互验证,并符合相关的理论分析。

The two aims of single-phase active power factor corrector （ PFC ） are unitary input power factor and low output voltage ripple. In terms of control and protection, input AC voltage, inductor current and output DC voltage should be detected at the same time. But some algorithms need not to detect all of them. In the paper, one of the single-phase active PFC＇s without input voltage are analyzed in theory, then simulated by means of MATLAB/SIMULINK, and finally implemented digitally based on TMS320F28335, a DSP supporting floating calculations. The gained results prove the theoretical analysis.