In accordance with the familiar configuration for present lighting system, the common harm of harmonic wave and numerical values were showed here.
针对目前灯光系统设计中常见的配置情况，指出常见的谐波危害及相关数值的计算。
On the basis of analysis of operation performance of AC motor, the harm of harmonic wave of electric net work to electric motor is summarized in the paper.
在分析交流电机工作特性的基础上，阐述了电网谐波对电机的危害。
The harm of the high degree harmonic wave in power system was introduced and the selection of prevention and the measure of controlling the harmonic interference were put forward.
本文简要介绍电力系统中高次谐波的危害，以及选择的防治、抑制谐波干扰的措施。
The harm and type of harmonic wave were introduced, and the principle of active filter was analyzed as well.
介绍谐波的危害，产生谐波的类型，有源滤波的原理。
The cause, harm and effect of harmonic wave were introduced.
介绍了谐波的产生原因、危害及影响。
The cause, harm and effect of harmonic wave were introduced.
介绍了谐波的产生原因、危害及影响。
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