應用於電源供應器前級之數位控制功率因數校正器之設計

Implementation of a Digital Power Factor Correction Controller for Power Supply Applications

徐志杰(Chih-Chieh Hsu)

指導教授 ： 劉萬榮

國立臺北大學/電機資訊學院/電機工程研究所/碩士(2011年)

摘要

本論文以全數位可程式化控制概念設計並實現應用於高功率之交直流功率因數校正級轉換器。輸入市電110VAC，至功率因數校正級電路中，輸出400V直流電壓、最大負載功率200W。功率因數校正控制器以Microchip公司所量產的dsPIC30F4011晶片，撰寫功率因數校正控制演算法，透過平均電流控制法，使電感電流能追隨輸入電流波形，達成低諧波失真、低漣波電壓與高效率目的。
由於以全數位化控制實現電源系統具有可程式化、元件少、設計彈性佳的優點，所以業界也陸續開始進行數位化電源的開發與設計，分別偵測輸入電壓、電感電流、輸出電壓並與參考電壓比較後，送至內、外迴路數位PI進行補償，藉由控制法來調整電感電流變化，完成循環週期的控制迴路，最後達成輸出穩壓與電流波形追隨輸入電壓波形的目標。同時，論文中將透過Matlab/Simulink軟體模擬，功率因數校正電路系統的行為與響應，作為實體電路中各點波形的參考與補償器參數調整的模型。

關鍵字

功率因數校正 ； 數位可程式化控制

並列摘要

This thesis focuses on the study of digitally programmable control concepts as well as on the design and implementation of a power factor correction(PFC)circuit for high power applications. It uses a 110VAC mains voltage as input and then step-up input voltage to the PFC converter by the autotransformer.The output voltage and load power are 400V and 200W respectively. Digital signal controller(DSC) system control core uses dsPIC30F4011 produced by Microchip. The algorithms of the PFC utilizes the average current control method which allows the inductance current and voltage be in phase to achieve low harmonic distortion, low ripple output voltage and high efficiency
A DSC-based fully digital control of PFC can achieve programmable, fewer components and greater flexibility design. The circuit can be realized through scaling input voltage, inductor current, and output voltage by ADC module. Then compensates and obtains the error signal by comparing the set reference voltage in the digital PI compensation. The down-scaled signal will be sent to the DAC to do the steps and control the duty signal for PWM with a complete cycle of the control loop. Finally, the desired output regulation and current in-phase with voltage waveform are achieved. Behavioral simulation of the power factor correction stage is verified by using Matlab/Simulink software and full model of PFC is obtained by reference waveform parameters adjustment and compensation.

並列關鍵字

Power Factor Correction ； Digital Programmable Controlled

參考文獻

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[8]S. U. Sulistijo and P. N. Enjeti, "Advanced DSP Based Single Phase Power 　Factor　Correction Approach," Unitrode Power Supply Design Seminar, 2000.

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