新型非線性載波控制之高功因昇壓型整流器研製

Design and Implementation for High-Power-Factor Boost Rectifiers by Novel Nonlinear Carrier Control

賴俊呈(Chun-Cheng Lai)

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(2003年)

https://doi.org/10.6828/KSU.2003.00011

摘要

本論文中，吾人設計出一種操作在連續導通模式的新型非線性載波控制之昇壓型整流器，具備高功因及穩壓的性能。
在高功因方面是利用感測二極體的電流，來設計新型的非線性載波控制電路，控制輸入線電流與輸入線電壓的波形相同，以達到高功因的目的。電路設計過程中，利用實作及Is-Spice模擬軟體，驗證非線性載波控制電路之相關波形的正確性。
在穩壓方面是以LFR(Loss Free Resistor)模式的觀念，推導出非線性載波控制之高功因整流器的小訊號等效電路及其轉移函數，並使用頻譜分析儀量測波德圖，以驗證轉移函數的正確性。接著，利用頻率響應法(波德圖)，設計PI控制器，以達到閉迴路控制的穩壓目的。
閉迴路控制的實作電路完成後，以電力測量儀量測功因，確實達到0.99以上；另外，以負載變動及輸入電壓有效值變動，驗證輸出電壓的穩壓性能，果然達到極佳的穩壓效果。

關鍵字

高功因 ； 非線性載波控制

並列摘要

In this thesis, novel nonlinear-carrier (NLC) control is proposed for a boost rectifier operated in the continuous-conduction mode (CCM). The NLC controlled rectifier is designed to possess the performances of high-power-factor and output voltage regulation.
The diode current sensing is used to design the circuit of the novel NLC controller such that the resulting input-line current follows the input-line voltage, as required for unity-power-factor rectification. The waveforms relative to the novel NLC controller are verified by the experiment and simulation of Is-Spice software.
Based on the loss-free resistor (LFR) concept, a small-signal model for the unity-power-factor rectifier is derived. The transfer function of the analytical model is verified by the Bode plot measured from a spectrum analyzer. Furthermore, based on frequency response method a PI controller (Bode polt)is designed to achieve the closed-loop control for the performance of output-voltage regulation.
From the results of experiment, the power-factor is greater than 0.99 measured by a power meter. The output voltage is insensitive to the variations of load and input-line voltage. The performance of output- voltage regulation is excellent by the closed-loop control.

並列關鍵字

nonlinear carrier(NLC)control ； high power factor

參考文獻

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