Analysis and Measurement of Small Signal Stability for a Commercial PFC Circuit
Date Issued
2007
Date
2007
Author(s)
Huang, Wei-Lun
DOI
zh-TW
Abstract
The theme of this thesis is focused on the measurement and analysis in the small signal model of a power factor correction circuit (PFC). By the design of a system feedback compensator, the analysis of system stability is achieved.
In this thesis, several PFC models and control methods are introduced, and the operating theory of PFC is illustrated in detail. In further, the small signal models in average current mode of both current and voltage loops are derived so that the transfer functions can be applied to the design of the system feedback compensator. In order to validate the feasibility, the MATHCAD and MATLAB programs are applied to test the accuracy.
By utilizing TI commercial PFC control IC “UCC3817”, the control loop compensator is implemented and completed. The measurement results of frequency response analyzer are in accord with the mathematical computation. In the end, the practical techniques and approaches to measure both current and voltage loops, which can be an important reference for the industry, are advanced and come to a conclusion.
Subjects
升壓式轉換器
功率因數修正
小信號迴路增益量測
平均電流模式
交流 / 直流電源轉換器
電壓迴路控制
電流迴路控制
Boost Converter
Power Factor Correction
Small-Signal Loop Gain Measurement
Average Current Mode Control
AC DC Converte
Voltage Mode Control
Current Mode Control
Type
thesis
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