共查询到19条相似文献,搜索用时 156 毫秒
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提出了一种E类驱动结构的谐振式电子镇流器,将E类结构和buck-boost功率因数校正结构整合成一种单级式电子镇流器。由于E类驱动式的谐振电路只需一个开关管,经过整合后的电路也只需一个控制电路和一个开关管,进一步降低了镇流器的成本提高了效率。文章分析了E类镇流器电路工作在最佳情况下的工作状态,仿真采用脉宽调制控制电路工作。 相似文献
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本文介绍了微线性公司(Micro Linear)制造的一种电子镇流器核心控制集成电路及其工作原理。该电路包括功率因数校正电路和灯光亮度调整的自保护电路,是电子镇流器向智能功率集成的一个很好实例。 相似文献
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新型电子镇流器控制芯片IR2156 总被引:1,自引:0,他引:1
文中介绍了一款低成本、高效电子镇流器控制芯片IR2156的主要特点和功能模式 ,给出了由IR2156组成的紧凑型节能灯和普通荧光灯电子镇流器的应用电路 相似文献
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<正> 笔者通过对多种市售成品电子镇流器电路的剖析和反复实验对比,设计出一种性能稳定、工作可靠、性价比高的电子镇流器电路,它不仅适合电子爱好者自制,也可供生产厂家借鉴参考。 工作原理 图1示出了电子镇流器的电原理图,为便于说明原理,图1中绘出虚线框内的日光灯管接线。二极管D1~D7和电容C2、C3等构成交流电整流滤波电路,向镇流器电路提供直流用电。开关功率三极管BG1、BG2和双向触发二极管ST、单孔磁环变压器T等构成高频振荡开关波(方波)产生电路,其中R1、C4和ST组成锯齿波发生器,用于启动振荡电路。方波振荡电路将直流电变为高频交流电,用于点燃日光灯管。由于BG1、BG2工作在开关状态,故可获得极高效率。电感L2和C8、C9等构成串联谐振电路,其作用是起辉日光灯管和限制灯管工作电流。 相似文献
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Chien-Ming Huang Tsorng-Juu Liang Ray-Lee Lin Jiann-Fuh Chen 《Power Electronics, IEEE Transactions on》2007,22(5):1573-1582
This paper presents a constant power control circuit for a three-stage high-intensity discharge (HID) electronic ballast. The three-stage electronic ballast is composed of a boost pre-regulator to achieve a high power factor, a DC/DC buck converter to regulate lamp current with constant lamp power, and a full-bridge inverter to drive the HID lamp with a low-frequency ac squarewave current. The buck converter operating in current mode utilizes current sense level-shift technique to achieve constant power output. The proposed constant power control circuit is easily designed and implemented for the three-stage HID electronic ballast. Finally, a laboratory prototype of a 70 W HID electronic ballast is implemented. The measured results show that the proposed ballast can be applied for various HID lamps with low lamp power variation (less than 0.6%). 相似文献
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一种高性能电子镇流器的设计 总被引:2,自引:0,他引:2
介绍了BL8301的主要特点,给出了提高抗干扰能力的滤波电路和用于荧光灯的电子镇流器实用电路,对工作原理进行了详细分析,给出了电路设计参数和设计方法,简要说明了在设计制作过程中的难点问题。该电子镇流器具有结构简单、成本低、性能优良、可靠性高的特点。实验验证了设计是可行的。 相似文献
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A novel single-stage push-pull electronic ballast with high input power factor is presented in this paper. The proposed electronic ballast combines the front-end power-factor corrector and push-pull converter into a single-stage power converter. Compared to the single-stage class-D electronic ballast, the proposed circuit does not require an isolated driver. The control of the circuit is easier and the cost less. The circuit of the ballast is analyzed and the design guidelines are listed. The experimental results verify the theoretical derivation 相似文献
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This paper proposes a three-phase electronic ballast with current-equalization function. By properly designing the resonant tank and the values of the resonant inductance and resonant capacitance, the current difference between lamps can be significantly reduced. Hence, 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. The analysis and design of the proposed circuit will be presented in this paper. Finally, the proposed three-phase electronic ballast with current-equalization function will be implemented to validate and demonstrate the performance and feasibility of the proposed circuit 相似文献
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基于电子驱动器VK05CFL的CFL电子镇流器可以实现预热、灯寿终保护、灯存在检测和自动重启等功能。文中介绍了VK05CFL的引脚功能和内部结构,给出了用VK05CFL芯片设计高性能电子镇流器的几种实现方案。 相似文献
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The “charge pump” electronic ballast circuit, which employs a charging capacitor and a high-frequency AC source to implement power factor correction (PFC), has become an attractive topology for ballasting fluorescent lamps. However, the basic “charge pump” electronic ballast circuit has the problems of high total harmonic distortion (THD) of the input current and high crest factor (CF) of the lamp current. This paper analyzes the origin of the problems and proposes a novel solution. With the addition of two small clamping diodes, good input current (PF>0.99, THD<5%) and lamp current (CF<1.6) can be obtained with open-loop control. Experimental results are provided for verification 相似文献
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文中给出了一种采用高效功率因数校正控制器KA7526设计的低功耗、高功率密度的电子镇流器的新型电路 ,并给出了电路中各元器件的具体参数 ,同时介绍了KA7526控制器的主要特点、引出端功能和内部结构 相似文献