本論文以數位單週期控制實現三相無橋式升壓高功因交-直流轉換器，由於普遍使用的平均電流控制法必須要有乘法器電路以及除法器電路，且同時要有外環電壓補償器與內環電流補償器，因此轉換成數位控制相對複雜。本論文採用經過離散化的單週期控制技術，不需輸入電壓信號，只需要電壓補償器去消除市電兩倍頻漣波，讓整個控制法變成數位化的過程相對簡單。
本論文在實作單相並聯為三相無橋式升壓轉換器電路中時，每相電感電流會互相耦合，導致功率因數控制出現故障。因此必須在輸入電壓端加上一個三相變壓器以解耦相電流。
最後利用DSP驗證三相無橋式升壓高功因交-直流轉換器之單週期數位控制，實現輸入電壓50V(rms)~70V(rms)，輸出電壓100V。測試結果顯示此控制法可實現高功率因數以及低電流總諧波失真。

A DSP-based approach to realize one-cycle control (OCC) for the bridgeless boost AC-DC converter with power-factor-correction (PFC) is proposed in this thesis. The general use of the average current method usually needs a multiplier circuit, a divider circuit, an outer-loop voltage compensator and an inner-loop current compensator. The implementation is relatively complex. Therefore, this thesis adopts a voltage compensator with dis-crete-time one-cycle control method to avoid the complex computational structure. The control method does not need to feedback the line voltage. It only needs to eliminate the second order harmonic voltage component.
When the bridgeless topology is applied to a three-phase circuit, the inductor current of each phase could couple each other, leading to mal-function in the power factor control. Thus, a three-phase transformer must be added to the input voltage terminal to decouple the phase current.
Finally, the discrete-time one-cycle control scheme was implemented using an DSP to realize a prototype of the three-phase bridgeless PFC boost AC-DC converter. The input voltage ranges between 50V(rms) and 70V(rms), which is converted to a DC output voltage of 100V. Test result shows that the proposed converter can operate with high power factor and low current total harmonic distortion.

[1] "Electromagnetic compatibility (EMC) part 3-2： Limits for harmonic current emissions," IEC 61000-3-2, 2009.
[2] W. Zhang, F. Guang, L. Yan-Fei, and W. Bin, "A digital power factor correction (PFC) control strategy optimized for DSP," IEEE Trans. Power Electron., vol. 19, no. 6, pp. 1474-1485, 2004.
[3] B. A. Mather and D. Maksimovi´c, "A Simple Digital Power-Factor Correction Rectifier Controller," IEEE Trans. Power Electron., vol. 26, no. 1, pp. 9-19, 2011.
[4] A. de Castro, P. Zumel, O. Garcia, "Concurrent and simple digital controller of an AC/DC converter with power factor correction based on an FPGA," IEEE Trans. Power Electron., vol. 18, no. 1, pp. 334-343, 2003.
[5] E. Aridhi, M. Abbes, and A. Mami, "FPGA implementation of predictive control," in Proc. IEEE Mediterranean Electrotechnical Conference, pp. 191-196, 2012.
[6] J. Rajagopalan, F. C. Lee, and P. Nora, "A generalized technique for derivation of average current mode control laws for power factor correction without input voltage sensing," in Proc. IEEE Applied Power Electronics Conference and Exposition, vol. 1, pp. 81-87, 1997.
[7] J. Luo, M. K. Jeoh, and H. C. Huang, "A new continuous conduction mode PFC IC with average current mode control," Power Electronics and Drive Systems, vol. 2, pp. 1110-1114, 2003.
[8] M. Orabi, R. Haron, and A. El-Aroudi, "Comparison between Nonlinear-Carrier Control and Average-Current-Mode Control for PFC Converters," in Proc. IEEE Power Electronics Specialists Conference, pp. 1349-1355, 2007.
[9] M. K. H. Cheung, M. H. L. Chow, and C. K. Tse, "An analog implementation to improve load transient response of PFC pre-regulators," in Proc. International Telecommunications Energy Conference, pp. 848-855, 2007.
[10] P. C. Todd, "UC3854 controlled power factor correction circuit design," U-134 Application Note, Texas Instruments, pp. 269-288.
[11] L. Yu-Tzung and T. Ying-Yu, "Digital control of boost PFC AC/DC converters with low THD and fast dynamic response," in Proc. IEEE International Power Electronics and Motion Control Conference, pp. 1672-1677, 2009.
[12] A. Prodic, C. Jingquan, R. W. Erickson, and D. Maksimovic, "Digitally controlled low-harmonic rectifier having fast dynamic responses," in Proc. IEEE Applied Power Electronics Conference and Exposition, vol. 1, pp. 476-482, 2002.
[13] K. M. Smedley and S. Cuk, "One-cycle control of switching converters," in Proc. IEEE Power Electronics Specialists Conference, pp. 888-896, 1991
[14] K. K. Sum, "Power factor and its effect on power quality," Power Conversion Proc. , 1989.
[15] 謝蓓薇，”以數位晶片化技術實現具單週期控制之無橋式昇壓高功因交-直流轉換器”，碩士論文，中華民國101年6月
[16] "Power Factor Correction (PFC) Basic," Application Note AN-42047, Fairchild Semiconductor, 2004.
[17] J. P. M. Figueiredo, F. L. Tofoli, and B. L. A. Silva, "A review of single-phase PFC topologies based on the boost converter," in Proc. IEEE Industry Applications (INDUSCON), pp. 1-6, 2010.
[18] L. H. Dixon, "High power factor prerequlator for off-line power supplies," Unitrode power supply design seminar, Manual SEM-600, 1988.
[19] C. Silva, "Power Factor Correction with the UC3854," Application Note, Unitrode Integrated Circuit.
[20] R. Redl and B. P. Erisman, "Reducing distortion in peak-current-controlled boost power-factor correctors," in Proc. IEEE Applied Power Electronics Conference, pp. 576-583, 1994.
[21] J. J. Spangler and A. K. Behera, "A comparison between hysteretic and fixed frequency boost converters used for power factor correction," in Proc. IEEE Applied Power Electronics Conference and Exposition, pp. 281-286, 1993.
[22] K. M. Smedley and S. Cuk, "One-cycle control of switching converters," IEEE Trans. Power Electron., vol. 10, no. 6, pp. 625-633, 1995.
[23] K. M. Smedley and S. Cuk, "Dynamics of one-cycle controlled Cuk converters," in IEEE Transactions on Power Electronics,vol. 10, no. 6, pp. 634-639, Nov. 1995, doi: 10.1109/63.471282.
[24] R. Brown and M. Soldano, "One cycle control IC simplifies PFC designs," in Proc. IEEE Applied Power Electronics Conference and Exposition, vol. 2, pp. 1-5, 2005.
[25] T. K. Jappe and S. A. Mussa, "Discrete-time one cycle control technique applied in single-phase PFC boost converter," in Proc. IEEE International Symposium on Industrial Electronics (ISIE), pp. 1555-1560, 2011.
[26] Energy Star Standard, 2008, http://www.energystar.gov/
[27] A. F. de Souza and I. Barbi, "High power factor rectifier with reduced conduction and commutation losses," in Proc. Int. Telecommunication Energy Confenrence, pp. 8.1.1–8.1.5, 1999.
[28] Yong Chen , Wen-ping Dai , Jun Zhou and Eric Hu "Study and design of a novel three-phase bridgeless boost power factor correction,"IET Power Electron.,2014,Vol. 7, lss. 8,pp. 2013-2021
[29] 陳韋璁，”輸入串/並聯輸出並聯模組化雙開關順向式轉換器研製”，碩士論文，中華民國104年7月
[30] W.A. Tabisz, M.M. Jovanovic, F.C. Lee, “Present and future of distrib-uted power systems,” IEEE Applied Power Electronics Conference and Exposition, pp. 11-18, February 1992.