邱克型功因修正電路之數位控制

Abstract

本論文以邱克型轉換器為主電路架構搭配數位控制方式來實現定電流感測控制下的功率因數修正電路，其電路架構有別於一般雙迴路控制的昇壓型轉換器架構。論文中主要探討這樣的非典型的架構的控制方式與輸出特性是否能滿足IEC61000-3-2的諧波標準?本文是採德州儀器C2000系列中的TMS320F28335這一顆DSP來進行整個電路的控制。此款DSP是屬於TMS320C28X系列中具有浮點運算功能，較以往的定點運算功能的DSP，TMS320F28335的精度大大提高外，也具有成本低、功耗小、數據及程序處理儲存量更大以及AD轉換更加精確與快速等特點。 數位電源控制具有提供簡單方便的適用性、提供更佳的電源管理系統、提供複雜電源控制的解決方案、提供一個共同的電源控制設計平台、降底成本、提供具有附加價值的智慧型整合功能。上述的優點都來至於可程式化的特性，這也是本文捨棄類比IC改用數位控制的主要因素。

This thesis presents Cuk converter and its digital control method to achieve the power factor correction (PFC) function. Compared to the common dual- loop-control method, this thesis focuses on the new control mode to meet IEC61000-3-2 harmonic standard. This context is adopted from Texas Instruments C2000 series TMS320F28335 , of which DSP chip is to be controlled by the entire circuit. This DSP is categorized into TMS320F28X series, which has floating-point capabilities. Compared to the fixed-point DSP, it has not only more accuracy arithmetic function, but also has the advantages of low cost and low power consumption. Furthermore, it can hold greater data storage capacity and handle more accurate and faster AD converter, and so on. Digital Power Control is equipped easy and convenient applicability, providing better power management system, sophisticated power control solution, common design platform power control, cost decrease factor, and, most importantly, value-added intelligent integration. As the above-mentioned advantages are derived from programmable feature, so this is also a main factor to use DSP Chip to replace analog PWM IC.