臺灣博碩士論文加值系統

複金屬燈屬於高照度氣體放電燈之一種，具高發光效率、良好演色性、壽命長與體積小等優點，是相當重要的照明燈源之一。本論文提出具定功率控制之新型複金屬燈電子式安定器，當燈管等效電阻變化時仍可將燈管功率控制在一定值，並以低頻方波電流驅動燈管避免音頻共振之現象。
具定功率控制之三級架構電子式安定器主要由昇壓型轉換器、降壓型轉換器與全橋型換流器所組成。控制燈管功率的降壓型轉換器操作於電流模式控制法並利用具準位位移電流偵測電路來達到定功率控制，量測結果顯示燈管功率的變化在±0.6%之內，且70W安定器整體效率在86.4%至89.5%之間。本論文亦提出一雙級高功因電子式安定器，前級是一單開關雙輸出整合型轉換器，後級為一低頻操作的半橋型換流器。輸入功因修正與燈管定功率控制之功能可由單開關雙輸出整合型轉換器來達成，實驗結果顯示輸入電流諧波失真可符合IEC 61000-3-2 Class C之規範，且燈管功率之變化在±1.1%之內，70W安定器整體效率則在85.5%至86.1%之間。
在多燈管應用方面，本論文提出兩個多燈管電路架構。第一個是三級架構多燈管電子式安定器，主電路架構包含昇壓型轉換器、返馳型轉換器與半橋型換流器。每一燈管功率均由相對應的返馳型轉換器獨立控制，量測結果顯示此安定器可驅動四支20W燈管且整體效率為85%至86.5%之間。另一雙級雙燈管電子式安定器主架構包含昇壓型轉換器與三臂換流器。具錯相式控制之三臂換流器同時兼具燈管定功率控制與燈管低頻驅動之功能，實驗結果顯示可驅動兩支35W燈管之安定器整體效率在85.7%至89.7%之間。

The metal-halide (MH) lamp is one kind of high-intensity-discharge (HID) lamp. The MH lamp provides high performance in terms of luminous efficacy, color rendering, long life, and compact size. Thus, the MH lamp has become a popular lighting source. In this dissertation, novel electronic ballasts with constant power control for MH lamps are proposed. The MH lamp is driven by low-frequency square-waveform current to avoid the phenomenon of acoustic resonance. Also, the lamp power is controlled at a constant level, even if the equivalent resistance of the MH lamp is changed.
The three-stage electronic ballast with constant power control is constructed of a boost converter, a buck converter, and a full-bridge inverter. The buck converter is a lamp power control stage, which is operated at the proposed current mode control with a level-shifted current-sensing signal to achieve constant output power control. The measured results show that the variation of the lamp power is within ± 0.6 %. The overall efficiency of the 70W three-stage electronic ballast is between 86.4 % and 89.5 %. In addition, a two-stage, high power factor electronic ballast is presented in this dissertation. The front stage is a single-switch two-output integrated converter. The post stage is a low-frequency half-bridge inverter. The functions of power factor correction and lamp power control are achieved by the single-switch two-output integrated converter. The measured results illustrate that the harmonic distortion of the input current satisfy the requirements of the IEC 61000-3-2 Class C standard. The variation in lamp power is within ± 1.1 %, and the overall efficiency of the 70W two-stage electronic ballast is between 85.5 % and 86.1 %.
For multi-lamp applications, two circuit topologies are proposed in this dissertation. The proposed three-stage multi-lamp electronic ballast is composed of a boost converter, flyback converters, and a half-bridge inverter. Each lamp’s power is independently controlled with constant power by the corresponding flyback converter. The measured results show that the overall efficiency of the 20W four-lamp electronic ballast is between 85 % and 86.5 %. The proposed two-stage two-lamp electronic ballast includes a boost converter and a three-leg inverter. The functions of constant lamp power control and low-frequency lamp driving are achieved by the interleaving controlled three-leg inverter. The measured results depict that the overall efficiency of the 35W two-lamp electronic ballast is between 85.7 % and 89.7 %.

LIST OF CONTENTS……………………………………………………………………I
LIST OF FIGURES………………………………………………………………………III
LIST OF TABLES………………………………………………………………………VI
CHAPTER 1 INTRODUCTION………………………………………………………1
1.1 Background…………………………………………………………………………1
1.2 Motivation…………………………………………………………………………1
1.3 Dissertation Outline…………………………………………………………………5
CHAPTER 2 THREE-STAGE ELECTRONIC BALLAST WITH CONSTANT
POWER CONTROL……………………………………………………7
2.1 Introduction…………………………………………………………………………7
2.2 Operating Principle of Three-Stage Electronic Ballast……………………………7
2.3 Analysis of Buck Converter…………………………………………………………9
2.4 Analysis of The Proposed Constant Power Control Method………………………14
2.5 Control Circuit of Three-Stage Electronic Ballast…………………………………18
2.6 Design Example and Experimental Results………………………………………21
2.7 Summary…………………………………………………………………………27
CHAPTER 3 TWO-STAGE HIGH POWER FACTOR ELECTRONIC
BALLAST………………………………………………………………28
3.1 Introduction………………………………………………………………………28
3.2 Operating Principle of The Proposed Two-Stage Electronic Ballast………………28
3.3 Analysis of Single-Switch Two-Output Integrated Converter……………………32
3.4 Control Circuit of The Proposed Two-Stage Electronic Ballast……………………37
3.5 Design Example and Experimental Results………………………………………39
3.6 Summary…………………………………………………………………………45
CHAPTER 4 THREE-STAGE MULTI-LAMP ELECTRONIC BALLAST………46
4.1 Introduction………………………………………………………………………46
4.2 Operating Principle of The Proposed Multi-Lamp Electronic Ballast……………46
4.3 Analysis of Flyback Converter……………………………………………………48
4.4 Control Circuit of The Proposed Multi-Lamp Electronic Ballast…………………53
4.5 Design Example and Experimental Results………………………………………54
4.6 Summary…………………………………………………………………………58
CHAPTER 5 TWO-STAGE TWO-LAMP ELECTRONIC BALLAST……………59
5.1 Introduction………………………………………………………………………59
5.2 Operating Principle of Interleaving Controlled Three-Leg Inverter………………59
5.3 Control Circuit of Interleaving Controlled Three-Leg Inverter……………………69
5.4 Design Example and Experimental Results………………………………………73
5.5 Summary…………………………………………………………………………79
CHAPTER 6 CONCLUSIONS………………………………………………………80
REFERENCES…………………………………………………………………………82
VITA………………………………………………………………………………………89
LIST OF PUBLICATIONS……………………………………………………………90

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