输出电感

输出电感，又称滤波电感或平滑电感，是电压调节模块（VRM）中的关键元件，在输出级起储能作用。它与输出电容配合，将开关晶体管产生的脉冲直流电压转换为稳定、低纹波的直流输出：在开关周期的导通期间储存能量，在关断期间释放能量。该元件对于维持电压稳定、降低电磁干扰（EMI）以及提高CPU、GPU和其他数字处理器电源电路的功率效率至关重要。

输出电感基于电磁感应原理工作。当电流流过线圈时，产生磁场并储存能量。在开关周期的导通阶段，电流增大，能量储存在磁场中；在关断阶段，磁场崩溃，感应出电压以维持流向负载的电流。这一作用将开关晶体管产生的脉冲输入平滑为连续的直流输出，其电感值决定了电流变化率和滤波效果。

The output inductor operates based on electromagnetic induction principles. When current flows through its coil, it generates a magnetic field that stores energy. During the switching cycle's on-phase, current increases, storing energy in the magnetic field. During the off-phase, the magnetic field collapses, inducing a voltage that maintains current flow to the load. This action smooths the pulsed input from the switching transistors into a continuous DC output, while its inductance value determines the rate of current change and filtering effectiveness.