LED照明驱动电源研究与实现
发布时间：2018-11-01 11:56
【摘要】：本文的工作是设计一款可调光LED照明驱动电源,并进行仿真和调试。 本文首先介绍了LED照明的知识背景,然后介绍了驱动电源的五种常用的直流变换电路。本文研究了可控硅调光,并分析了四种调光兼容方案。本文还研究了功率因数校正和电磁兼容的工程方法。 根据设计需求,本文选用反激变换器和单级PFC作为驱动电源的拓扑,驱动电源工作于电流断续模式并采用峰值电流控制方式。基于AP1682,本文着重设计了功率因数校正功能和反激变压器,为提高可靠性,变压器中增加了RCD箝位电路。本文还设计了EMI滤波电路、输出滤波电路、线性补偿电路和空载保护电路。最后,本文针对调光兼容问题,设计了阻尼电路、泄放电路以及深度调光电路。 基于Saber,本文对单级PFC反激变换器进行了仿真,分析了功率因数校正功能,分析了变压器、开关管、副边功率二极管的工作情况,分析了EMI滤波电路的工作效果。基于LTspice IV,在不同的充电电阻下,本文对可控硅调光器的输出电压波形进行了仿真。 本文对驱动电源实物进行调试,分析了功率因数校正功能、输出电流线性调整率和负载调整率、功率器件的工作情况、电磁兼容效果。接入调光器后,本文测试了调光曲线并验证了深度调光的效果。
[Abstract]:The work of this paper is to design, simulate and debug a dimming LED lighting driver. This paper first introduces the knowledge background of LED lighting, and then introduces five kinds of DC conversion circuits commonly used in driving power supply. In this paper, thyristor dimming is studied and four dimming compatible schemes are analyzed. The engineering methods of power factor correction and electromagnetic compatibility are also studied in this paper. According to the design requirements, the flyback converter and single-stage PFC are selected as the topology of the driving power supply, which works in the current intermittent mode and adopts the peak current control mode. In this paper, the power factor correction function and flyback transformer are designed based on AP1682,. In order to improve reliability, the RCD clamp circuit is added to the transformer. EMI filter circuit, output filter circuit, linear compensation circuit and no-load protection circuit are also designed. Finally, the damping circuit, discharge circuit and depth dimming circuit are designed for dimming compatibility. Based on Saber, the single-stage PFC flyback converter is simulated, the power factor correction function is analyzed, the working condition of transformer, switch tube and auxiliary side power diode is analyzed, and the working effect of EMI filter circuit is analyzed. Based on LTspice IV, the output voltage waveform of thyristor is simulated under different charge resistance. In this paper, the function of power factor correction, the linear adjustment rate of output current and load adjustment rate, the working condition of power device and the effect of EMC are analyzed. After the dimmer is connected, the dimming curve is tested and the effect of depth dimming is verified.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.34
本文编号：2303859
[Abstract]:The work of this paper is to design, simulate and debug a dimming LED lighting driver. This paper first introduces the knowledge background of LED lighting, and then introduces five kinds of DC conversion circuits commonly used in driving power supply. In this paper, thyristor dimming is studied and four dimming compatible schemes are analyzed. The engineering methods of power factor correction and electromagnetic compatibility are also studied in this paper. According to the design requirements, the flyback converter and single-stage PFC are selected as the topology of the driving power supply, which works in the current intermittent mode and adopts the peak current control mode. In this paper, the power factor correction function and flyback transformer are designed based on AP1682,. In order to improve reliability, the RCD clamp circuit is added to the transformer. EMI filter circuit, output filter circuit, linear compensation circuit and no-load protection circuit are also designed. Finally, the damping circuit, discharge circuit and depth dimming circuit are designed for dimming compatibility. Based on Saber, the single-stage PFC flyback converter is simulated, the power factor correction function is analyzed, the working condition of transformer, switch tube and auxiliary side power diode is analyzed, and the working effect of EMI filter circuit is analyzed. Based on LTspice IV, the output voltage waveform of thyristor is simulated under different charge resistance. In this paper, the function of power factor correction, the linear adjustment rate of output current and load adjustment rate, the working condition of power device and the effect of EMC are analyzed. After the dimmer is connected, the dimming curve is tested and the effect of depth dimming is verified.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM923.34
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