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Power quality improvement using bridgeless-Landsman converter for LED driver

机译：使用无桥朗兹转换器的LED驱动器改善电能质量

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摘要

This study presents a bridgeless-Landsman converter for power factor correction (PFC) of light-emitting diode (LED) driver. It is targeted for high brightness LED driver with pulse-width modulation dimming for brightness control. This PFC converter is used to feed dual output flyback DC-DC converter which supplies power to the LED module and forced cooling unit with galvanic isolation. The brightness control of LED is performed by three independent synchronous buck converters. The PFC converter is designed to operate in discontinuous input inductor current mode for inherent PFC at universal AC mains. A prototype of the proposed PFC LED driver is developed to validate experimentally the design and model. The power quality indices of the proposed LED driver are evaluated at rated and light load conditions for universal AC mains (90-265 V) with brightness control. The power quality indices are found within acceptable range of international harmonic standard IEC 61000-3-2 for universal AC mains.
机译：本研究提出了一种用于发光二极管（LED）驱动器的功率因数校正（PFC）的无桥朗兹曼转换器。它适用于具有脉宽调制调光功能以进行亮度控制的高亮度LED驱动器。该PFC转换器用于向双输出反激式DC-DC转换器馈电，该转换器通过电隔离为LED模块和强制冷却单元供电。 LED的亮度控制由三个独立的同步降压转换器执行。 PFC转换器设计为在不连续的输入电感器电流模式下运行，以实现通用交流电源上固有的PFC。开发了所提出的PFC LED驱动器的原型，以通过实验验证设计和模型。建议的LED驱动器的电源质量指标在带有亮度控制的通用交流电源（90-265 V）的额定和轻负载条件下进行评估。电能质量指标在通用交流电源的国际谐波标准IEC 61000-3-2的可接受范围内。

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