Light-emitting-diode (LED) drivers are required to maintain the power quality of both the AC input and DC output side. The regulation prevents adverse impacts on the grid and maintains the nominal operating condition of LEDs. Without significant filtering, the input power from a single-phase AC source can result in low-frequency flickers that raise health issues. This study proposes a LED driver topology to achieve low harmonics at the AC side and maintain flicker-free operation to drive LEDs. A novel ripple-cancelling scheme is developed to minimise redundant power processing and reduce circuit complexity to achieve high-conversion efficiency. The new topology supports a simple control strategy to operate the driver effectively. Experimental evaluation demonstrates the system performance and verifies the novelty and contribution.

中文翻译：

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基于新颖的纹波消除技术的LED驱动器可实现无闪烁运行并降低功耗

需要发光二极管（LED）驱动器来保持交流输入和直流输出端的电能质量。该法规可防止对电网造成不利影响，并保持LED的正常工作状态。如果没有有效的滤波，单相交流电源的输入功率会导致低频闪烁，从而引发健康问题。这项研究提出了一种LED驱动器拓扑，以在AC端实现低谐波并保持无闪烁运行来驱动LED。开发了一种新颖的纹波消除方案，以最大程度地减少冗余电源处理并降低电路复杂度，以实现高转换效率。新拓扑支持简单的控制策略，以有效地驱动驱动程序。实验评估证明了系统性能，并验证了其新颖性和贡献。