用于低电压大电流LED驱动的无桥ZETA PFC转换器

2017 6th International Conference on Computer Applications In Electrical Engineering-Recent Advances (CERA) Pub Date : 2017-10-01 DOI:10.1109/CERA.2017.8343387

A. Jha, Bhim Singh

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引用次数: 14

摘要

本文研究了用无桥ZETA对低压大电流多串发光二极管(LED)进行功率因数校正的方法。该应用程序是为具有照明控制的大面积LED照明设计的。采用多模LED调光技术进行照明控制。BL-ZETA PFC转换器为隔离反激式DC-DC转换器提供电源。反激变换器的稳压低压是同步降压变换器的源电源，用于多串LED驱动和LED结强制冷却系统。BL-ZETA PFC变换器电感设计基于不连续电感电流模式(DICM)，以低成本提供良好的PFC。根据硬件测试结果，设计和开发了所提出的LED驱动器。对LED驱动器的关键参数进行了测试和测量，并在通用输入交流(90-265 V)的全负载调光控制能力下进行了测试，观察到总谐波失真(THD)小于IEC 61000-3-2 C类谐波限值。

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Bridgeless ZETA PFC converter for low voltage high current LED driver

This paper deals with power factor correction (PFC) in low voltage high current (LVHC) multi-string light emitting diode (LED) using a bridgeless (BL) ZETA. This application is designed for large area LED lighting with illumination control. A multi-mode LED dimming technique is used for lighting control. The BL-ZETA PFC converter feeds power to isolated flyback DC-DC converter. The regulated low voltage from flyback converter is a source power to the synchronous buck converters for multi-string LED driver and forced cooling system for LED junction. The BL-ZETA PFC converter inductor design is based on discontinuous inductor current modes (DICM) which provide good PFC at low cost. The proposed LED driver is designed and developed with hardware test results. The critical parameter of the LED driver is tested and measured at full load with dimming control capability for universal input AC (90–265 V). The total harmonic distortion (THD) is observed lesser than the IEC 61000-3-2 Class C harmonic limits.

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来源期刊

2017 6th International Conference on Computer Applications In Electrical Engineering-Recent Advances (CERA)

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