以DSP實現之半橋式單級轉換器控制

Implementation of a Half-Bridge Single-Stage Converter Control Using DSP

柯懿峰(Yi-Fong Ke)

指導教授 ： 歐勝源

國立臺北科技大學/電資學院/電力電子產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00188

摘要

本論文提出一種以數位訊號處理器(Digital Signal Processor, DSP)為基礎之單級AC/DC轉換器，發展出數位式單級功率因數修正器之控制方法，以提升功率因數及效率、降低諧波失真(Total Harmonic Distortion, THD)及成本。
所提電路基本結構是以功率因數修正級的半橋電路架構(AC/DC)與功率調節級半橋隔離式電路架構(DC/DC)合併成具功率因數修正(Power Factor Correction, PFC )的單級轉換器架構(AC/DC)，降低原本的電路開關數，也使兩級控制迴路簡併成單一的迴路，藉以降低成本、提高效率。在控制架構上，除了傳統方式外，本文提出一種新式控制策略，採用單一的電壓迴路控制，使電流操作在不連續模式 (Discontinuous Conduction Mode, DCM)，簡單而能達成功率因數修正效果。
本論文採用德州儀器(Texas Instruments, TI)所生產的數位訊號處理器DSP-TMS320LF2407A來實現所提出的控制法則，相對於傳統控制法則乃至類比控制，數位控制迴路的電路設計較簡單且具設計彈性。最後以實作電路驗證所提之控制策略，結果顯示控制策略確實可行且符合設計要求。

關鍵字

單級轉換器 ； 數位控制 ； 功率因數修正

並列摘要

A single-stage AC/DC converter which is developed using Digital Signal Processor (DSP) to implement a novel control strategy for elevating power factor and efficiency and reducing THD and cost is proposed in this thesis.
The single-stage topology is merged from one power factor corrector and one power regulation stage, both the half-bridge structures. The proposed circuit features the reducing of switch number and only one control circuitry. Power factor correction is easily and successfully achieved with the novel DCM control strategy using DSP-TMS320LF-2407 manufactured by TI. Compared to traditional control methods, the proposed is simpler, more flexible to implement higher power factor and efficiency. Experiments are conducted to verify the theoretical analysis.

並列關鍵字

Single-Stage converter ； Digital control ； Power Factor Correction

參考文獻

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