New continuous-input current charge pump power-factor-correctionelectronic ballast

Continuous-input current charge pump power-factor-correction (CIC-CPPFC) electronic ballasts are proposed in this paper. The CPPFC circuit and unity power factor condition using the charge pump concept are derived and analyzed. The average lamp current control with switching frequency modulation was developed so that low crest factor and constant lamp power operation can be achieved. The developed electronic ballast has continuous input current, so that a small line input filter can be used. The proposed CIC-CPPFC electronic ballast was implemented and tested with two 45 W fluorescent lamps. It is shown that the measured line input current harmonics satisfy IEC 1000-3-2 Class C requirements     

Power factor-corrected DCM-based electronic ballast

This paper deals with the design, modeling, analysis and simulation of power factor-corrected and low crest factor-based electronic ballast for a compact fluorescent lamp. The proposed electronic ballast is a combination of a buck–boost ac–dc converter as power factor regulator operating in discontinuous conduction mode and a half bridge series resonant inverter, which is used for converting constant dc link voltage into high-frequency ac voltage to drive the fluorescent lamp. The design, modeling and simulation of this topology are performed using MATLAB-Simulink for an 18 W, 220 V, 50 Hz compact fluorescent lamp. With the utilization of proper commutation techniques like zero voltage switching, the overall switching losses are reduced at high operating frequency of 60 kHz. The power quality indices such as displacement power factor, distortion factor, total harmonic distortion of ac mains current, power factor and crest factor are evaluated for proposed electronic ballast, which is found as per IEC-61000-3-2 class C requirements.     

提高荧光灯电子镇流器效率的研究

荧光灯的发光效率与电源的频率存在一定的依赖关系,发光效率在一定频率范围内随电源的频率增大而升高,但是电子镇流器的效率随频率的提高而降低,所以需要综合地选择一个合适的工作频率,才能使灯管和镇流器整体的效率最高。本文深入研究了电子镇流器中各元件的参数性能对电子镇流器工作效率的影响,提出了减小荧光灯电子镇流器自身功耗的方法,其使荧光灯电子镇流器自身功耗降低1W以上,对于设计制造高性能电子镇流器具有一定的参考价值。     

一种新型调光电子镇流器

介绍了一种新型的荧光灯调光控制方式,即通过同时调制占空比和开关频率的方式控制荧光灯的输出功率。首先,基于与功率相关的荧光灯模型,通过基波近似的方法得到了控制方程,得出了荧光灯的调光特性。然后,以一个半桥式串联谐振并联负载电路为例,给出了设计步骤及仿真、实验结果。     

高功率因数可调光荧光灯电子镇流器

提出了一种简单易行的晶闸管控制荧光灯调光方法。给出了新型电子镇流器的电路结构,重点讨论了提高其功率因数、功率变换及可变调光的工作机理。该新型电子镇流器通过在调光器中引入电源电压信号处理装置,使电源进线由原来单纯传递电能,转变为包含控制信号,在原有接线方式的基础上实现了亮度可调。样机实验表明,该电子镇流器具有一定的应用价值。     

An electronic dimming ballast with bifrequency and fuzzy logiccontrol

This paper presents the analysis and design of a series-resonant parallel-loaded inverter applied to electronic dimming ballasts with bifrequency and fuzzy logic control. The analysis of the ballast is carried out in conjunction with the fluorescent lamp represented in a plasma model. The component values of the power stage, as well as two switching frequencies, according to the desired maximum and minimum power levels are, therefore, determined. The power levels in between are controlled by varying the ratio between two time intervals for which the two frequencies last, respectively. This mechanism is achieved by using a fuzzy logic controller (FLC). A ballast prototype with the FLC which is implemented on an 8-bit microprocessor with a reduced instruction set computer architecture has been built. Experimental measurements have shown the feasibility of the ballast with the proposed control strategy     

光源光输出波动的准确测量及其影响因素

本文定义了表征光源光输出波动的三个参数：波动深度、闪烁指数和调制深度。比较了线性照度传感器、光敏二极管、普通照度计探头和光电倍增管四种探测器用于测量光波动的优缺点,发现照度传感器能满足测量要求,而在简单测量时可以采用光敏二极管。用照度传感器对各种常用光源的波动深度进行测量,发现钨丝灯的波动深度为6%～31%,随功率的增大而下降。对荧光灯,电感镇流时波动深度高达42%～48%;使用高质量的电子镇流器时波动深度可以〈10%。方波电子镇流的金属卤化物灯光波动〈3%,小于电感镇流的1/20。分析了光源瞬时功率波形与光波动的相关性,发现要使光波动深度小,要求荧光灯电子镇流器的直流母线要平滑,高强度气体放电灯瞬时功率的过零时间越短越好。     

小功率荧光灯具谐波超标问题探讨

随着灯具产品越来越多地使用电子镇流器,所产生的谐波电流造成的影响越发严重.现在国家强制认证的"CCC"标准中对谐波的要求日益重视.小功率的固定式、嵌入式荧光灯具谐波容易超标,该文对此进行了分析,并进行了整改的探讨.     

荧光灯照明光输出和闪烁的研究

对荧光灯照明光输出特性的研究和评价十分必要。闪烁指数是重要的评价指标。闪烁基频为工频频率的二倍，采用电感镇流时闪烁高达10％以上，降压或调光则急剧增加。采用电子镇流时，特别是输入功率因数有源校正方式，可使荧光灯在宽输入电压变动范围内接近于无闪烁运行。     

基于电荷泵功率因数校正技术的小功率高压钠灯用电子镇流器

本文研究了输入电流连续型电荷泵功率因数校正(CIC-CPPFC)技术在电子镇流器中的应用,采用CIC-CPPEC技术实现的电子镇流器,与传统的双功率级电子镇流器相比,结构简单、电压应力低、功率密度高、成本低。本文成功设计出了一台适合50W高压钠灯用电子镇流器。实验表明,这种单功率级电子镇流器不仅能实现高压钠灯变频软启动,而且能保证在输入电网电压大范围变化时实现恒功率运行。它具有完善的多重保护功能,功率因数大于0.98,THD值小于15%。     

基于电荷泵功率因数校正技术的小功率高压钠灯用电子镇流器

本文研究了输入电流连续型电荷泵功率因数校正(CIC-CPPFC)技术在电子镇流器中的应用,采用CIC-CPPEC技术实现的电子镇流器,与传统的双功率级电子镇流器相比,结构简单、电压应力低、功率密度高、成本低。本文成功设计出了一台适合50W高压钠灯用电子镇流器。实验表明,这种单功率级电子镇流器不仅能实现高压钠灯变频软启动,而且能保证在输入电网电压大范围变化时实现恒功率运行。它具有完善的多重保护功能,功率因数大于0.98,THD值小于15%。     

基于SIMULINK的电子镇流器无源功率因数校正(PPFC)的仿真

电子镇流器以其体积小,质量轻,节能等优点,在照明工程中得到越来越多的应用。该文介绍了电子镇流器的工作原理,几种无源功率因数校正技术,并对其进行了仿真。     

A practical comparison among high-power-factor electronic ballasts with similar ideas

This paper provides a comparative analysis among four electronic ballast topologies with high power factor, employing the same switch for inverter and power factor correction stage. The analyses done are based on experimental results. A commercial electromagnetic ballast (EMB) is tested to provide a comparison with implemented electronic ballasts. The features of each topology are shown through the discussion of their advantages and disadvantages. The electronic ballasts are made for two 40-W fluorescent lamps at 50-kHz switching frequency and for a 110-V/sub rms/ 60-Hz utility line.     

Design and analysis of an electronic ballast with a secondary DC output

An electronic ballast circuit for a high‐frequency operated fluorescent lamp, which uses switched‐capacitor techniques, is presented in this paper. A part of energy in the electronic ballast is derived to a secondary DC output as a power supply. All the switching devices are zero‐current switching in the proposed circuit. The circuit is integrated with the function of a DC/DC converter. Therefore, the circuit has a dual functionality with simple control method. Simulation results and experimental results of the ballast with an FL‐15D lamp are used to verify the performance of the proposed circuit. Copyright © 2007 John Wiley & Sons, Ltd.     

T4、T5电子节能荧光灯故障的统计分析和设计改进

T4、T5荧光灯是新型高效节能光源,但是它配套的电子镇流器支架早期损坏率较高影响了其推广,对收集的损坏样品的统计分析表明,T4、T5荧光灯电子镇流器设计存在“误用”元件问题,经试验提出了设计改进建议。     

混合型调光电子镇流器的研究

介绍了一种新型的荧光灯调光控制方式，即通过占空比调制和频率调制相结合的方式控制荧光灯的输出功率。首先，基于与功率相关的荧光灯模型，通过基波近似的方法得到了控制方程，得出了荧光灯的调光特性；然后，以一个半桥式串联谐振并联负载电路为例，给出了设计步骤及仿真、实验结果。     

调光式荧光灯电子镇流器研究

提出了一种由Buck-Boost功率因数校正电路和Class-D谐振逆变器组成的单级调光式荧光灯电子镇流器的实现和控制新方案,并由40W荧光灯的实验样机得出分析结论和设计方法。结果表明,这种镇流器结构简单,直流母线电压低于300V,适合于220V/50Hz电网工作,功率因数达到0.98,THD低于13%,并且能够实现平滑调光。     

The effects of supply harmonics on the performance of compactfluorescent lamps

A performance evaluation of ten compact fluorescent lighting systems operated with sinusoidal and distorted voltage waveform conditions is described. The lamps are provided with either an electronic ballast, a magnetic core ballast, or a magnetic core ballast with a power factor correction circuit. The test results show that the electrical performance of the lamps for both sinusoidal and distorted voltage waveform operation is related to the type of ballast used. The operating cost of these lamps is calculated and compared to the cost of operating a conventional 60 W incandescent lamp     

Single-Stage Single-Switch High-Power-Factor Electronic Ballast for Fluorescent Lamps

This paper presents an efficient, small-sized, and cost-effective single-switch power-factor-correction (PFC) scheme for high-frequency electronic ballasts. The circuit topology originates from the integration of a buck-boost PFC converter and class-E electronic ballast. Only one active power switch is commonly used by both power stages to save the cost of active switches and control circuits. The active switch is controlled by pulsewidth modulation at a fixed switching frequency and constant duty cycle. The electronic ballast can achieve nearly unity power factor by operating the buck-boost converter at discontinuous conduction mode. With carefully designed circuit parameters, the active power switch can be operated at zero-voltage switching, leading to high circuit efficiency. A prototype circuit designed for a PL-27-W compact fluorescent lamp is built and tested to verify the theoretical predictions. Satisfactory performance is obtained from the experimental results.     

High power factor electronic ballast using resonant converter for compact fluorescent lamp

This paper proposes a novel single stage single switch resonant inverter with high power factor for electronic ballast. The power factor correction circuit is at the input side. It is designed to operate at discontinuous conduction mode. The lamp power is controlled by adjusting the duty ratio of the active switch of the power factor correction circuit. The circuit operation is analyzed in detail to derive the design equations. Circuit parameters are designed based on design considerations. Finally, prototype electronic ballast for a 40‐W compact fluorescent lamp is built and tested. The efficiency and the performance of the proposed converter are verified for the designed prototype. Copyright © 2016 John Wiley & Sons, Ltd.