对称型Cockcroft—Walton倍压器纹波的谐波特性

Ripple harmonics in symmetrical Cockcroft-Walton voltage multiplier

在一个自制的模型倍压器上，通过测量纹波，分析了纹波的各次谐波成分与电路非对称性和负载的关系．结果表明，纹波可以分为由电路非对称性产生的奇次谐波和电容器充放电产生的偶次谐波．轻载时奇次谐波中基波起主导作用，可以认为其是在线性近似条件下电路非对称在输出端产生的交流纹波部分。电路非对称时，随着负载电流的增大，二极管导通状况的非对称性使奇次谐波成分变大。

Harmonics of the ripple have been investigated experimentally at a self-made model Cockcroft-Walton (C-W) voltage multiplier, as a function of the circuit asymmetry and load. The results showed that the odd harmonics of the ripple was due to the circuit asymmetry and the even harmonics due to the charge-discharge process of capacitors. Under a light load condition, the fundamental harmonics was dominant compared with other harmonics, which could be considered to be the alternating ripple caused by the circuit asymmetry in the linear circuit approximation. When the circuit was asymmetrical, asymmetry of the diode conduction could increase the odd harmonics of the ripple.