Insulation coordination for equipment within low - voltage systems - part 4 : considerations of high - frequency voltage stress 低压系统内设备绝缘协调性.第4部分:高频电压应力问题
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Various textiles and leather are used as the bed charge of high - frequency voltage marks so as to produce a softening effect on the material 高频电压标主要底料是各种布料或皮料。特点是产品更加柔软。
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The main advantage of this pdm converter is that one half - cycle of the high - frequency voltage becomes the basic unit of synthesis of the low - frequency signals . the area difference under the reference signal and synthesized signal and the next pulse with the polarity will reduce thi s difference Pdm技术的特点是将高频交流脉冲信号的一个半周期作为合成低频信号的基本单元，通过比较同时刻参考波形和输出波形的面积差，使得两个曲线包围的面积可以基本维持平衡。
