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拓扑与电路 PWM控制 DC-DC变换器 ★ 2.0

基于开关电容的电流补偿器用于缓解PWM驱动器与LED光源间长电缆的影响

Switched-Capacitor-Based Current Compensator for Mitigating the Effect of Long Cable Between PWM Driver and LED Light Source

语言:

中文摘要

在大规模照明应用中,LED光源与PWM驱动器之间的长电缆会导致电流脉冲上升沿延迟,降低光通量,并产生负向电压尖峰。本文提出了一种基于开关电容的电流补偿器,旨在消除长电缆寄生电感带来的负面影响,提升驱动电流的响应速度与系统稳定性。

English Abstract

It is sometimes unavoidable to have light-emitting-diode (LED) light sources and their pulsewidth modulation (PWM) drivers connected by long cables in large-scale illuminations. However, long-cable inductance delays the rate of rise of the driving current pulses and thus leads to the reduction of luminous flux output. It also causes the off-state voltage across the light sources negative, which wo...
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SunView 深度解读

该技术主要针对照明驱动领域,与阳光电源核心的光伏逆变器及储能系统业务关联度较低。然而,其核心思想——利用开关电容电路补偿长距离传输线带来的寄生参数影响,在阳光电源的组串式逆变器或大功率储能系统(如PowerTitan)的内部信号传输、传感器采样链路或特定辅助电源设计中具有一定的参考价值。在大型地面电站或储能电站中,若存在长距离控制信号或低压辅助电源传输,该补偿拓扑可作为提升信号完整性与系统抗干扰能力的优化方案。