臺灣博碩士論文加值系統

應用柔性切換技術（切換於零電壓或零電流）於功率換流器上可以有效的改善其性能，例如：提高工作頻率以離開人們的音頻範圍，降低電磁干擾（EMI），減少切換損及限制功率開關元件之dv/dt、di/dt等切換應力。本論文所使用之半共振式直流鏈（Quasi-Resonant dc link）柔性切換電路，此電路於換流器上需外加兩個開關，一個功率二極體、電感及電容，而且所加入之開關亦為柔性切換，因此額外之能量損失可降至最少。如此之半共振式電路可於直流鏈上產生出零電壓，使換流器開關恰切換於零電壓處。另外調變策略為使用空間向量脈寬調變（Space-Vector PWM）捨棄傳統之正弦脈寬調變（Sinusoidal PWM），SPWM無法完全使用直流鏈電壓、諧波大而且為類比控制方式，線路複雜不易維修。現今數位化以成驅動控制器的一般標準，故性能優越且易於數位化之SVPWM以成脈寬調變策略中之主流。而整個系統之控制則全由Altera的晶片組FLEX PF10KA10LC84-4來執行，此種以硬體語言描述之設計方法使設計之時程大幅縮短，並增加了系統設計的維護性及修改性。由實驗之結果證明我們所使用之此種柔性切換電路工作穩定且可靠度佳。

Soft-switching techniques ( zero current switching or zero voltage switching ) applied to power inverter can substantially improve the performances, allowing high frequency operation and minimization of acoustic noise and EMI, reduction of switching losses, limitation of dv/dt and di/dt stress in the power devices .The quasi-resonant dc link soft switching circuit used in this paper needs additional components such as two switches, a diode, an inductor and a capacitor, the two switches are also soft switching, which produces a minimum losses. The quasi-resonant dc link circuit notching the bus voltage and allowing the switches of the inverter just switching at zero voltage. The modulation technique we adapt is Space-Vector PWM and refuse traditional sinusoidal PWM, because the SPWM can't completely utilize the dc link voltage, current ripple is badly and analogical mode control, which is complex and not easy to maintain. Now the digitalization design has become the standard of the drive- controller, so the superior performance and easy-digitized SV-PWM has become major method in the PWM techniques. The control of the system are processed by the chips FLEX PF10KAL10LC C84-4 of Altera company. Whose hardware description language can scrimp the time in design and makes the system more easily to maintain and modify. The experiment results have shown that our soft-switching circuit works very stable and reliably.

第一章 緒論
第二章 半共振式直流鏈電路分析
第三章 空間向量脈寬調變分析
第四章 模擬結果與實驗驗證
第五章 結論與展望

〔1〕 H. Hemphill and T. Wiesman,"The influence of motor cable parameters on conducted EMI and motor reliability," Power Conversion and Intelligent Motion, October, pp.92~101, 1993.
〔2〕 B. Mokrytzki,"Filters for adjustable frequency devices," Ninth Annual Applied Power Electronics Conference and Exposition, pp.542~548, 1994.
〔3〕 S. Chen and T. A. Lipo, "Modeling of Motor Bearing Currents In PWM Inverter Drives," IEEE Transactions on industry application, vol. 32, No. 6, Nov/Dec 1996.
〔4〕 P. L. Cochran,"Polyphase Induction Motor Analysis Design and Application," Marcel Dekker Inc, New York, pp.388~395, 1989.
〔5〕 D. M. Divan,"The Resonant dc Link Converter - A New Concept in Static Power Conversion," IEEE Trans. Ind. Applicant, vol. 25, No. 2, pp. 317~325, March 1989.
〔6〕 J. He and N. Mohan,"parallel Resonant dc Link Circuit -A New Zero Switching Loss Toplogy With Minimum Voltage Stress," In IEEE Power Electron. Specialists Conf, pp. 1006~1012, 1989.
〔7〕 L. Malesani, P. Tenti, D. M. Dvain, and V. Toigo,"A Synchronized Resonant DC Link Converter For Soft-Switched PWM,"IN IEEE. Ind. Applicat. Soc. Annu. Meeting, pp. 1006~1012, Oct 1989.
〔8〕 J. S. Lai and B. K. Bose,"High Frequency Quasi-Resonant DC Voltage Notching Inverter for AC Motor Drives,"In IEEE-IAS. Ann. Meeting, pp. 1202~1207, Oct. 1990.
〔9〕 J. He, N. Mohan and B. World,"Zero-Voltage-Switching PWM Inverter for High- Frequency dc-ac Power Conversion,"IEEE-LAS. Ann. Meet, pp. 1215~1221, Oct. 1990.
〔10〕J. G. CHO, H. S. KIM, and G. H. CHO,"Novel soft switching PWM converter Using A New Parallel Resonant DC-Link,"IEEE Power Electron. Specialists Conf. Rec, pp. 241~247, Jun. 1991.
〔11〕L. Malaseni, P. Tenti, P. Tomasin, and V. Toigo,"High Efficiency Quasi-Resonant DC Link Three-phase Inverter Full-Range PWM,"In Applied Power Electron. Conf. Rec, pp. 472~478, Feb. 1992.
〔12〕Duk-Bae Suh, Jong-Woo Choi, and Seung-Ki Sul,"Voltage Gradient Suppression In Application To AC Motor Drives-Resonant DC Link Approach,"IEEE Transaction On Power Electronics, pp. 601~606, 1996.
〔13〕Duk-Bae Suh, Jong-Woo Choi, and Seung-Ki Sul,"Resonant Link Bidirectional Power Converter：partⅠ- Resonant Circuit, partⅡ- Application To Bidirectional AC Motor Drive Without Electrolytic Capacitor,"IEEE Transaction On Power Electronics. vol. 10, No. 4, pp. 479~493, 1995.
〔14〕F. Bernet,"Diminishing Torque Pulsation In Induction Motors Powered By Pulsewidth Modulated Inverters,"Conf. Rec. 1st IFAC Symp. Contr. Power Electron Drives, pp. 615~634, 1974.
〔15〕J. Holtz and S. Stadtfeld,"A Predictive Controller For Stator Current Vector Of AC Machines Fed From A Switched Voltage Source," Conf. Rec. IPEC-Tokyo'83, pp. 1665~1675, 1983.
〔16〕Y. Murai, k. Asano and Y. Tsunehiro,"Discussion On PWM Method For Reduction Of Torque Pulsations On An Inverter Fed Induction Motor," Trans. IEEJ, vol. 101B, pp. 315~322, 1981.
〔17〕T. Takeshita and N. Matsui, "One-Chip Microcomputer-Based Flux-Controlled Real Time PWM,"Trans. IEEJ, vol. 105B, pp. 531~538, 1985.
〔18〕H. W. Broeck, H. C. Skudelny, and G. V. Stanke,"Analysis And Realization Of Pulsewidth Modulator Based On Voltage Space Vector,"IEEE - TAS, vol. 24, No. 1, pp. 142~150, Jan. 1988.
〔19〕V. R. Stefanovic and S.N. Vukosavic,"Space-Vector PWM Voltage Control With Optimized Switching Strategy,"IEEE Industry Applications Society Annual Meeting, Conference, pp. 1025~1033, 1992.
〔20〕B. Diong,"Space Vector PWM Control Of An Induction Motor Drive,"Proc. 4th IEEE. Conf, pp. 578~579, Appl. 1995.
〔21〕Y. Murai and Y. Tsunehiro,"Improved PWM Method For Induction Motor Drive In Verters,"Proc. IPEC-Tokyo, pp. 407~417, 1983.
〔22〕M. Morimoto, S. Sato, K. Sumito, and K. Oshitani,"Voltage Modulation Factor Of The Magnetic Flux Control PWM Method For Inverter,"IEEE Trans. Ind. Electron, vol. 38, pp. 57~61, 1991.
〔23〕R. M. Park,"Two-Reaction Theory Of Synchronous Machines, partⅠ： Generalized Method Of Analysis,"AIEE Trans, vol 48, pp. 716~730, July 1929.
〔24〕J. Holtz, P. Lammert, and W. Lotzkat,"High-Speed Drive System With Ultrasonic MOSFET PWM Inverter And Single-Chip Microprocessor Control,"IEEE Trans. Ind. Appl, vol. IA-23, No. 6, pp. 1010~1015, Nov/Dec. 1988.
〔25〕A. M .Trzynadlowski and S. Legowski ,"Minmum-Loss Vector PWM Strategy For Three-Phase Inverters,"IEEE. Trans . Power Electron, vol. 9, pp. 26-4, Jan. 1994.