摘 要

无极灯作为新兴的照明灯具一经问世就迅速发展并且不断的推广。无极灯的照明原理和传统的钨丝灯、荧光灯、白炽灯等有极照明器具有着明显的不同，极大的提升了灯具照明的光效、显色性和使用的寿命。无极灯运用功率电子学、等离子体学、磁性材料学等研究成果，其原理为高频电源经耦合器产生高频旋转磁场使气体原子变为等离子态，返回基态时释放光能，摆脱了基于有极电源灯具的电气冲击问题，极大的提高了使用寿命。本文首先介绍了低频无极灯的工作原理和发展研究现状，并且在无极灯基于稳态工作时作变压器等效工作模型。然后根据本次设计的具体要求，分析并对输出额定功率15w,220Khz的无极灯电子镇流器进行设计。

首先选定电子镇流器主电路的两级型的拓扑结构，这种结构一级为Boost升压电路，用于提高功率因数并抑制输入电流的高次谐波；另一级为DC/AC变换器，调节输出和无极灯进行匹配。两级都有自己的控制环节，使整体电路可控性提升，但同时也存在着元件数多，成本较高的缺点。第二，分析系统的电磁干扰来源，设计简单、实用的EMI滤波器，从而抑制电网和电磁感叹和射频干扰，满足一定的标准。第三，设计PFC环节，本设计基于L6561芯片设计相关参数和电路设计，从而实现调节输出直流电压，使功率因数达到0.99以上。第四，逆变环节的选择和设定。无极灯的逆变环节采用他激式半桥逆变结构，控制简单可靠，实现输出400V、220Khz高频脉冲波的要求。本次设计没有要求系统工作的完整性，鉴于设计的实用性，加入了谐振电路的设计。

最后根据上述的原理和要求，设计一款直流输出400V，实际输出220Khz、额定15W的低频无极灯镇流器前级。它包括了EMI滤波环节、桥式整流环节、PFC功率矫正环节和逆变驱动环节和谐振环节，从而使无极灯正常工作。本次的设计结构简单，尤其是PFC环节的外接元件少，成本低，有利于具体的实现和工业生产但同时能满足较高的设计精度。

关键词：无极灯，EMI，功率因数矫正，半桥逆变，谐振

Abstract

Promise lights as emerging lighting has come out on the rapid development and continuous promotion. The principle of lighting the electrodeless lamp and the traditional tungsten filament lamp, fluorescent lamp, incandescent lamp and so on have a very different lighting device, greatly enhance the lighting efficiency of lighting, color and the use of life. Induction lamp using power electronics, plasma, magnetic materials and other research results, the general principle of high-frequency power supply by the coupler to produce high-frequency rotating magnetic field so that gas atoms into a plasma state, return to ground state when the release of light, Based on the electrical impact of lamps with pole power, the service life is greatly improved. This paper first introduces the working principle and development status of low frequency electrodeless lamp, and makes the equivalent working model of the transformer when the electrodeless lamp is based on steady state operation. And then according to the specific requirements of this design, analysis and 15w, 220Khz electrodeless lamp design electrodeless lamp electronic ballasts and high-frequency power converters.

   First, the two-stage topology of the electronic ballast main circuit is selected. This structure is Boost boost circuit, which is used to improve the power factor and suppress the high harmonics of the input current. The other stage is DC / AC The converter, the regulated output and the electrodeless lamp are matched. Two have their own control links, so that the overall controllability of the circuit to enhance, but also there are many components, the higher cost shortcomings. Second, the analysis system of electromagnetic interference sources, simple design, practical EMI filter, thus inhibiting the power grid and electromagnetic sigh and radio frequency interference, to meet certain standards. Third, the design PFC link, the design based on L6561 chip design parameters and circuit design, in order to achieve the regulation of output DC voltage, the power factor of 0.99 or more. Fourth, the selection and setting of inverter links. The inverter part of the inverter with his frictional half-bridge inverter structure, simple and reliable control, to achieve the output 400V, 220Khz high-frequency pulse wave requirements. This design does not require the integrity of the system work, in view of the practicality of the design, joined the resonant circuit design.

   Finally, according to the above principles and requirements, the design of a DC output 400V, the actual output 220Khz, 15W low frequency lamp ballast. It includes the EMI filter links, bridge rectifier links, PFC power correction links and inverter drive links and resonant links, so that the work of the electrodeless lamp. This design is simple, especially PFC part of the external components less, low cost, is conducive to the realization of specific and industrial production but at the same time to meet the high design accuracy.

Key words: electrodeless lamp , EMI, power art correction, half bridge inverter

目 录

摘 要 I

Abstract II

1 绪论 1

1.1无极灯的历史和发展 1

1.1.1无极灯发展 1

1.1.2无极灯的原理 1

1.2无极灯的研究现状 2

1.2.1国内外无极灯的研究现状 2

1.2.2无极灯的发展趋势 3

1.3 论文的主要工作 3

2 无极灯电子镇流器组成环节 5

2.1设计要求和原理框图 5

2.2系统的拓扑结构选择 5

2.2.1按控制级区分 5

2.2.2按拓扑电路结构区分 7

2.3功率因数矫正方法区分 8

2.3.1连续模式控制 9

2.3.2断续的模式控制 11

2.4逆变系统的驱动区分 12

2.5本章小结 13

3 PFC环节的设计 14

3.1功率因数矫正的原因 14

3.2基于芯片L6561芯片的PFC环节设计 14

3.2.1芯片的选择和分析 15

3.2.2 L6561电路的搭建和仿真 16

3.3实验结果和分析 19

3.4本章小结 22

4逆变环节和谐振环节的设计 23

4.1逆变器的种类和选择 23

4.2逆变电路驱动电路的设计 25

4.3本章小结 28

5 无极灯等效参数和谐振环设计 29

5.1无极灯的等效模型和参数计算 29

5.2逆变谐振电路参数设计 30

5.2.1逆变电路的设计和工作过程分析 30

5.2.2谐振回路的参数设定 31

5.3本章小结 34

6 EMI环节的设计 35

6.1电子整流器的噪声影响 35

6.2不同类型噪声的抑制方法 35

6.3 EMI环节的设计 35

6.4本章小结 36

7总结和分析 37

参考文献 38

致 谢 39

附 录 40

1 绪论

1.1无极灯的历史和发展

1.1.1无极灯发展

照明系统极大的影响着人们的生活质量和工作质量。传统的照明系统无论是采用灯丝还是电极照明都必不可免的面临着发光、发热、电气冲击等造成的损耗，大大减少了照明系统的使用寿命。如白炽灯虽具有高功率因数、立即启动的优点，但光效低、发热从而导致寿命缩短；气体放电光效高、寿命长，但大部分不可立即启动，泄露易污染环境等。基于电磁感应的无极灯则没有上述的问题，同时兼具高光通量、低发热量、显色度高、低电磁污染等优点，因此无极灯迅速发展。

1.1.2无极灯的原理