單位功率因數之交流直流轉換器的分析與設計

Abstract

在高功率因數之交流-直流整流器中，當負載變 動時，如何設計控 制器，使得輸出電壓能迅速恢復穩 定值，是這裡我們所要探討的課 題。本論文探討主動 全橋式整流器，設計電壓控制器，以使輸出電 壓的反 應時間縮短。我們利用平均(averaging)及線性化 (linearization)的方法，建立此系統的一個近似數學 模型，然後 提出兩種控制器的設計方法，分別為適應性 比例-積分控制器( adaptive PI controller)，以及線 性二次調節器(linear quadratic regulator)，使得系 統的輸出電壓有快速恢復穩定的能 力。 The main subject to investigate here is designing a controller make the output voltage follow with the voltage command as soon as possible when loading is variating in AC-DC rectifier with high power factor. To improve the time response by designing a voltage controller, the active full bridge rectifier is adopted. A approximation mathematics model is established by the way of averaging and linearization, and then the adaptive PI Controller and Linear Quadratic Regulator are designed to make the output voltage follow with the voltage command rapidly and stably.