Phase Current Unbalance Estimation in Multiphase Buck Converters
Phase Current Unbalance Estimation in Multiphase Buck Converters
复制标题
多相降压转换器中的相电流不平衡估计
DOI：
10.1109/pesc.2006.1712203
复制
发表时间：
2006
影响因子：
6.7
通讯作者：
Seth R. Sanders
中科院分区：
文献类型：
--
作者：
G. Eirea;Seth R. Sanders
提出了一种多相降压变换器相电流不平衡度的估计方法。该方法利用输入电容器有效串联电阻（ESR）处的电压降中包含的信息来估计每相的平均电流。虽然电流的绝对估计取决于ESR的值，因此不是绝对准确的，相对于彼此的电流的相对估计被证明是非常准确的。该方法可以用低速率下采样A/D转换器来实现，并且计算不密集。实验结果表明，估计值和测量值之间的良好协议。
A method for estimating the phase current unbalance in a multiphase buck converter is presented. The method uses the information contained in the voltage drop at the input capacitor's effective series resistance (ESR) to estimate the average current in each phase. Although the absolute estimation of the currents depends on the value of the ESR and is therefore not absolutely accurate, the relative estimates of the currents with respect to one other are shown to be very accurate. The method can be implemented with a low-rate down-sampling A/D converter and is not computationally intensive. Experimental results are presented, showing good agreement between the estimates and the measured values.