A three-phase symmetrical multistage Voltage multiplier

IEEE Power Electronics Letters Pub Date : 2005-03-01 DOI:10.1109/LPEL.2005.845174

S. Iqbal

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引用次数: 45

Abstract

A three-phase symmetrical Cockcroft-Walton (CW) multistage voltage multiplier (VM) is proposed. It consists of one smoothing column and six oscillating columns. The oscillating columns are connected to three-phase power through center-tap transformers. The capacitors of the smoothing column are charged six times per cycle by six oscillating columns and are discharged six times through the load, unlike the conventional symmetrical VM in which they are charged and discharged twice per cycle. The three-phase symmetrical structure completely eliminates the first five harmonic components of load-generated voltage ripple. Theoretical analysis indicates that the proposed three-phase symmetrical CW-VM has one-third the voltage ripple and voltage drop of the conventional single-phase symmetrical CW-VM. Experimental and simulation results of the proposed three-phase symmetrical CW-VM as well as of the conventional single-phase symmetrical CW-VM are presented. A comparison shows that the three-phase symmetrical CW-VM has significantly less voltage ripple, half the voltage drop, and a fourfold increase in output power over the conventional single-phase symmetrical CW-VM.

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三相对称多级电压倍增器

提出了一种三相对称的Cockcroft-Walton（CW）多级电压倍增器（VM）。它由一个平滑柱和六个振荡柱组成。振荡柱通过中心抽头变压器连接到三相电源。平滑列的电容器每个周期由六个振荡列充电六次，并通过负载放电六次，这与传统的对称VM不同，在传统的对称虚拟机中，电容器每个循环充电和放电两次。三相对称结构完全消除了负载产生电压纹波的前五个谐波分量。理论分析表明，所提出的三相对称CW-VM具有传统单相对称CW-VM的三分之一的电压纹波和压降。给出了所提出的三相对称CW-VM和传统单相对称CW-VM的实验和仿真结果。比较表明，与传统的单相对称CW-VM相比，三相对称CW-VM具有显著更小的电压纹波、一半的电压降和四倍的输出功率增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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