过电压

Company develops and manufactures chargers mainstream products are applicable to a variety of nickel-metal hydride, nickel cadmium rechargeable batteries, saturation in the charge automatically from the state-of-charge to trickle charge, but also has a discharge, detection, negative voltage control and overheating protection function, is the leading high-tech, high-end charger.

公司开发并生产的主流充电器系列产品是适用于各种镍氢、镍镉可充电池，在充电饱和状态下，自动从充电状态转为涓流充电，还具有放电、检测功能、负电压控制及过热保护等功能，是领导潮流的高科技、高档充电器。

A simulation research is conducted on the example of six-phase double star winding shifted by 30°synchronous motor.In order to investigate the control algorithm of multilevel inverter , high harmonics as well as its problems, a mathematical model of the control algorithm based on the voltage space vector is built. For the first time, the principle along boundary is introduced to confirm the chosen switch state when many switch states are corresponding to the same vector. Simulation analysis and hardware realization are conducted with the combination of diode clamped three-level inverter and five-level inverter.

建立了基于空间电压矢量控制算法的仿真模型；仿真研究中采用对偶小矢量搭配改善中点电位波动的问题；针对多个开关状态对应同一待选矢量的问题引入&循边原则&确定被选择的开关状态；对过调制问题进行了相应的处理：结合二极管嵌位式三电平逆变器和五电平逆变器进行了仿真分析和硬件实现。

By so doing, switching loss is reduced and the utilization ratio of busbar voltage is increased. The relevant software was designed to meet the needs of high speed cone winder.

针对可能出现的过调制情况给出了两种针对高转速和低转速的调变方法，降低了开关损耗，提高了直流母线电压的利用率。

Whether the voltage instability, or the temperature too high, in addition to the inspection in accordance with the above steps, but also the working conditions in accordance with the computer to quickly positioning, such as the host power supply is turned on, you can hear the computer self-completion, if the hard disk light keep flashing, it should be the second to the fourth step in the inspection.

是否电压不稳定，或温度过高等，除了按上述步骤进行检查外，还可以根据计算机的工作状况来快速定位，如在开启主机电源后，可听见计算机自检完成，如果硬盘指示灯不停地闪烁，则应在第二步至第四步检查。

Were there no transformers to adjust the voltage, long- distance transmission of electricity would be impossible.

若无变压器来调节电压，远距离输送电力是不可能的。长跑运动员需要有很大的耐力。他的长腿很快跑过了这段距离。路遥知马力。

The influence of the leakage inductance of transformer on flyback converter and power device is great, which can be suppressed by RCD clamp method. However, the parameters of RCD clamp are usually achieved by the designers' experience.

反激式电源变压器的原边漏感对电路性能及其功率器件影响很大，通过RCD钳位电路可以很好地抑制由于漏感而产生的电压过冲，但钳位电路参数设计往往是通过经验获得，设计方法不是很明确。

The Two Way Automatic Communication System is implemented by modulating the power voltage at preselected zero of the voltage waveform of the distribution network.

双向工频电力通信的基本原理是利用工频电压基波波形过零信息实现信号的调制和解调。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。