second harmonics 二次谐波
second harmonics restraint 二次谐波制动
the second harmonics 二阶谐波项
enhancement of the second harmonics 增强二次谐波信噪比
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In order to eliminate the second-harmonics in the output side of single-phase PWM rectifier, the filter circuit consisting of an inductor and a capacitor is often used.
为了消除单相电压型 PWM 整流器输出侧二次谐波的影响，经常接入电感、电容组成的二次吸收回路，本文对于二次吸收回路的参数选取和运用效果进行了研究。
This "second" article refers to the inheriting section of the "first" one, it firstly introduces six kinds of active measures to reduce harmonics pollution;
本文“二谈”系“一谈”的继篇，首先介绍了减小谐波污染的六类主动措施；
The key point of structure design and accuracy analysis in precision mount which is needed in the procession to obtain second and third harmonics generation is introduced.
介绍了实现倍频和混频过程所需的精密调整架的结构设计要点及其精度分析。
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