類比及數位控制之升壓型功率因數校正整流器研製

Implementation of Analog and Digital Controlled Boost Power-Factor-Correction Rectifiers

鄭永昇(Yung-Sheng Cheng)

指導教授 ： 陳信助

崑山科技大學/工程學院/電機工程研究所/碩士(2010年)

https://doi.org/10.6828/KSU.2010.00060

摘要

本文以升壓型轉換器為功因校正整流器的核心架構，利用主動式功因校正技術的平均電流控制法，提高功率因數，減少輸入電流諧波，以符合國際電流諧波規範，並且提升電源容量的利用率。
平均電流控制法之高功因升壓型整流器系統包含快速的內迴路電流控制及慢速的外迴路電壓控制，其中內迴路電流控制主要是為了使平均輸入電流追隨輸入電壓波形，達到高功因性能；外迴路電壓控制主要是為了穩壓性能，使得輸出電壓能維持在一定值，克服輸入電壓振幅漂移及負載變動的影響。
從控制的觀點而言，為了衰減電壓控制信號的二次諧波，以免影響功因，高功因整流器的電壓迴路頻寬通常限制在20 Hz以內，所以輸出電壓對負載變動的響應是慢的。本文應用負載電流注入控制法，使得負載變動時，輸出電壓能快速響應。
本文以類比控制及數位控制兩種方式，研製高功因升壓型AC-DC整流器。在類比控制實作中，以功因校正控制IC UC 3854為核心，整流器規格為輸入電壓90 ~ 260 Vrms、輸出電壓400 V、最大輸出功率400 W；在數位控制實作中，以數位信號處理器dsPIC30F4011為核心，整流器規格為輸入電壓90 ~ 130 Vrms、輸出電壓312 V、最大輸出功率450 W。藉由量測結果驗證了轉換器確實具有高功因特性，在輸入電壓振幅變動及負載變動下，都能具有良好的輸出穩壓特性。

關鍵字

升壓型功因校正整流器 ； 數位信號處理器 ； 負載電流注入法

並列摘要

The active power-factor-correction (PFC) rectifier based on a boost converter with average current-mode control (ACC) technique is investigated in the thesis. It would comply with the international current standards on power factor and input current distortion of power supplies.
A boost PFC rectifier with ACC is controlled by two feedback loops, a fast inner current loop and a slow outer voltage loop. The current control of inner loop regulates the input current, so that its average value follows the rectified input voltage to achieve high power factor. The voltage control of outer loop maintains the rectifier output voltage at a reference level, against variation in load and fluctuation in line voltage.
Form the control point of view, the main limitation of ACC-controlled PFC rectifiers is that the bandwidth of the voltage loop is less than 20 Hz in order to properly attenuate the contents of the second line harmonic at the control signal. Therefore, the dynamic response of the output voltage to load variation is slow. A load-current-injection control technique is applied to remedy the drawback.
Both of analog and digital control methods are implemented for the boost PFC rectifiers. The analog control part with universal input voltage , output voltage and rated power is based on integrated circuit. The digital control part, with input voltage , output voltage and rated power is based on digital signal processor dsPIC30F4011. The experimental results are provided to verify the high power factor and the well output voltage regulation against the input voltage variation and load change.

並列關鍵字

boost power-factor-correction rectifier ； digital signal processor ； load-current-injection method

參考文獻

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