In the in- active state, the breakdown voltage were higher than the single air in the same conditions under AC and positive DC voltage, but it was opposite under negative DC voltage.
放电间隙较大的静止状态下，直流电压正极性和交流电压下气固混合两相体的击穿电压都大于相同条件下单一空气的，而直流电压负极性时则相反。
A positive polarity dc voltage is applied to the electrodes.
一个正极性的直流电压加于该电极上。
It was obtained through experiment and simulation that positive DC corona inception voltage and corona ion current under different air pressure and humidity conditions.
文中通过实验测量和模拟计算，得到了不同气压湿度下的正直流电晕起始电压和电晕离子电流。
The initiation voltage of short circuit treeing after the positive and the negative dc pre-stress increase by 26 8% and 36 3% respectively.
在正负极性直流预压短路树枝试验中，分别提高试样短路树枝起始电压26 8%和36 3%。
Researches indicate that negative peak value of the output voltage of the testing winding is linear with the positive DC magnetic biasing potential;
研究得出，当磁芯中存在正偏磁时，检测绕组输出端电压的负峰值与直流偏磁磁势是线性关系；
DC voltage is always positive (or always negative), but it may increase and decrease.
交流电压总是正极(或总是负极)，它一样会增殖或减殖。
These converters perform from positive to positive and negative DC DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure.
该变换器完成从正电压至正和负电压的DC- DC升压变换，功率密度和效率高，拓扑结构简单价廉。
These converters perform from positive to positive and negative DC DC voltage increasing conversion with high power density, high efficiency and cheap topology in simple structure.
该变换器完成从正电压至正和负电压的DC- DC升压变换，功率密度和效率高，拓扑结构简单价廉。
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