本碩論提出一具有鎖相迴路控制之均流電子式安定器及一具有均流效果之三相式電子安定器應用於冷陰極燈管。鎖相迴路控制的實現是藉由偵測諧振槽輸入電壓及變壓器漏電感的相位來達成。在本論文所提出的鎖相控制技術下，其電子安定器的操作頻率能連續的追蹤諧振頻率。因此電路的操作頻率不會低於諧振頻率，如此開關不會增加額外的切換損失。此外，藉由本文的參數最佳化設計，均流電子式安定器在滿載時的操作頻率即為燈管間輸出誤差電流最小時之頻率，因此有效的降低燈管輸出電流間的誤差。
　　本論文所提出之具有均流效果之三相式電子安定器，是藉由適當的設計諧振槽的諧振電感及諧振電容值間之比例，利用阻抗匹配之方法能有效的降低燈管輸出電流間的誤差。在本論文所提出之電路架構下沒有使用任何外加的均流電路元件，因此有效的節省電路成本。此外本論文將對所提出鎖相控制迴路技術及具有均流效果之三相式電子式安定器作一詳細的分析及設計。
　　最後本文將設計及完成一具有鎖相迴路控制之均流電子式安定器及一具有均流效果之三相式電子安定器應用於冷陰極燈管，以驗証在本文所提出電路之性能及可行性。

　This thesis has proposed a phase-locked loop (PLL) control scheme for the electronic ballast with current-equalization and a three-phase electronic ballast with current equalization function.

　The PLL control scheme is implemented through detecting the phase signals of both the input voltage of resonant tank and the two terminals of leakage inductor in the transformer, and then the operating frequency of the circuit continuously tracks the resonant frequency. Consequently, the operating frequency of the circuit has no change to be lower than the resonant frequency. Thus, the turn-on switching losses are not increased.

　In this thesis has also proposed a three-phase electronic ballast with current equalization function. By properly designing the value of resonant inductance and resonant capacitance, the current difference between the lamps can be significantly reduced. Hence, the current-equalization can be achieved by means of impedance-matching. Without an additional current-equalization circuit, the cost of the proposed circuit is reduced due to fewer components.

Finally, the proposed a phase-locked loop (PLL) control scheme for the electronic ballast with current-equalization and a three-phase electronic ballast with current equalization function circuits will be implemented to validate and demonstrate the performance and feasibility of the proposed circuits.

[1] Marco A. Dalla Costa, Mario L. Landerdahl Jr, and Ricardo N. do Prado, “Independent Multi-Lamp Electronic Ballast”, Industry Applications Conference, 2002. 37th IAS Annual Meeting. Conference Record of the , Volume: 2 , 13-18 Oct. 2002 Pages:1065 - 1070 vol.2.
[2] Chin Chang, “Multiple Lamp LCD Backlight Driver with Coupled Magnetic Components”, US 6,310,444 B1, Oct. 30, 2001.
[3] C.-C. Chen, Y.-T. Chuang, Y.-M. Chen and T.-F. Wu, “Multi-Phase Multi-Lamp Driving System for LCD Back Light”, in Proc. IEEE PESC Conf., 2004,pp.1823-1827.
[4] Ying Hsien Tsai, “Multiple CCFL Current Balancing Scheme for Single Controller Topology”, US 6,459,216 B1, Oct. 1, 2002.
[5] R. L. Lin, “Lamp Current-equalization Techniques with Phase-locked Loop Control for Cold Cathode Florescent Lamp” Taiwan Patent, Pub. No. 94124601, July, 20, 2005.
[6] Wei-Hong Lin, Chia-Yuan Chen, Deng-Kang Chang and Cheng-Chia Hsu, “Multi-Lamp Driving System”, US 6,534,934 B1, Mar. 18, 2003.
[7] Zaitsu, “Converter comprising a piezoelectric transformer and a switching stage of a resonant frequency different from that of the transformer,” U.S. Patent No. 5,768,111, February 26, 1996.
[8] Rodriguez F., Ribas J. and Alonso J.M.,”Analysis and design of the LCC-parallel series inverter with resonant current control as HPS lamp ballast,” Proceedings of Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual , Volume: 2 , June 17-21, 2001.

[9] C.S. Moo, H.L. Cheng, T.F. Lin and H.C. Yen,” Designing a dimmable electronic ballast with voltage control for fluorescent lamp,” Proceedings of the IEEE International Symposium on , Volume: 2 , July 12-16, 1999.
[10] M. Kazimierczuk and D. Czarkowski, “Resonant Power Converters,” John Wiley & Sons, Inc., 1995.
[11] R. L. Lin, “Lamp Current-equalization Techniques with Phase-locked Loop Control for Cold Cathode Florescent Lamp” Taiwan Patent, Pub. No. 94124601, July, 20, 2005.
[12] Yiyoung Sun, ” Improved simulation accuracy and reduced design time for electronic ballast designs which incorporate fixed frequency controller ICs, ” Proceedings of Conference Record IEEE, vol. 4, Oct. 6-10, 1996, pp 2183-2188.
[13] CD4046BC Data Sheet, Fairchild Semiconductor Corporation, 2002.
[14] LM565/LM565C Data sheet, National Semiconductor Corporation, 1999.
[15] Ming-Chieh Yeh, “Phase-locked Loop Control for Electronic Ballasts with Inductor voltage-Phase Feedback” M.S. Thesis, National Cheng Kung University, June. 2004.
[16] R. L. Lin, “A Three-Phase Electronic Ballast with Current Equalization Function” Taiwan Patent, Pub. No. 94130177, September, 2 , 2005.
[17] Dan Cretu, William G. Dunford, Mark Edmunds, “A Comparison of Three-Phase Resonant and PWM Converter for High Current, High Power Application” Proceedings of APEC ’97, pp.631-637.
[18] Eric Baker, “Design of Radial Mode Piezoelectric Transformers for Lamp Ballast Applications,” M.S. Thesis, Virginia Tech, May., 2002.
[19] L6384 Data Sheet, STMicroelectronics, Dec., 1999.