voltage efficiency

In this paper, some problems about IGBT's operation characteristics are discussed. A driving mode called zero voltage commutation and zero current commutation ( ZVC/ ZCC) technique with high efficiency and safety is introduced.

对IGBT的工作特性及存在的问题进行了深入探讨，详细介绍了用于提高大功率IGBT电桥的开关效率和安全性的ZVC／ZCC驱动模式。

At present, most withstand voltage test used by manual testing. The test works not only less efficiency and dangerous, the test result determined is subjective.

而目前，大多数耐压试验采用人工手动测试，不仅工作效率低、危险性大，而且测试结果判定主观性大，急需现代化的自动测试系统，规范其测试流程，提高测试效率。

Even 10 % upper of input voltage , the inverter efficiency is over 94 %.

以上的输入, 逆变器的效率都超过94%.

By comparing the performance of two prototypes, it was discussed how the load current and output voltage of front stage ( input voltage of back stage) influence on the efficiency of DC/ AC inverter, then the basis for the circuit optimization was obtained.

通过两台原理样机的性能比较，讨论了负载电流、前级输出电压（后级输入电压）对逆变器效率的影响，为优化设计电路提供了依据。

SPWM modulation is the important way to improve the invert power supply voltage efficiency and reduce the harmonic component.

SPWM调制是提高逆变电源电压利用率和减少谐波分量的重要方法。

The efficiency η is reduced while I 2 is still increased with the corona voltage and the corona current.

增大电晕电压和电晕电流可增加离子流引出总量，但引出效率却下降。

Comparing the test results of working frequency interflow high voltage and monopolar pulse high voltage, showed that highest removal efficiency was gained with ambipolar pulse voltage;

与工频交流高压、单极性脉冲高压的试验结果比较表明，双极性脉冲高压取得了最高的降解效果；

With a matrix structure and computer-aided automatically conversion of testing voltage, the testing efficiency has been greatly improved and a good data repeatability obtained.

由于采用阵列结构，计算机自动转换测量电压，测试效率大为提高，测得数据重复性好。

In the full-bridge thyristor shunt-wound inversion power supply, the efficiency of heating smaller forgings limited by the working frequency is low because of the high output voltage, the long induction coil, and the great noise.

由于全桥晶闸管并联逆变电源的输出电压高，感应圈长，噪声大，受工作频率限制，加热中小锻件的效率低。

In consideration of thermochemical method in demulsification of high water-content crude oil, the influences of temperature and quantity of demulsifier on the demulsification efficiency and demulsification velocity were investigated. Study on Demulsification Rate Under High Voltage Electric Field

针对高含水原油破乳中广泛采用的热化学法，试验研究了加热温度、加入破乳剂量对破乳效果和破乳速率的影响。水/油型乳液的高压电破乳速率的研究

The treatment of hardly biodegradable organic wastewater is studied by using electro-oxidation process, which emphases on the influence of the electrode material, packing, tank voltage, space between the electrodes, reaction time on the efficiency of organism degradation in the research.

采用电氧化法处理某化工厂难生化有机废水，重点考察了极板材料、填料、槽电压、极板间距、有效反应时间、pH值对难生化有机废水的处理效果的影响情况。