大功率的

A balance circuit is given for great power single phase load through analyzing and calculating three phase circuit .

通过对三相电路的分析、计算，介绍了一种大功率单相负载的平衡电路，从而为船电中常见的由大功率单相负载而引起三相电的不平衡问题，找到了一种有效的解决方法。

High-frequency continuous modulation on the high-power semiconductor laser is required in our ladar system. The theory and driving methods of the semiconductor laser is summarized in this article. Two kinds of driving circuit including linear power amplifier and resonance power amplifier are designed for continuous and quasi continuous modulated laser.

针对研制的无扫描激光雷达系统，需要对大功率半导体激光器进行高频连续调制，本文总结了半导体激光器的原理和驱动方法，并针对连续和准连续调制大功率激光器的特点分别设计了两套驱动电路，包括线性功率放大驱动电路和谐振功率放大驱动电路。

Contrapose the Big power high voltage frequency conversion equipment broad use on big power wind pump speed conversion economize ,the article explain forecast of regulate speed achieve economize power of fire active calcareousness for steel making in big rotative kiln ,and practice use in steel factory.

针对于大功率高压变频器在大功率风机调速节能上广泛的应用，本文介绍了烧制炼钢用活性灰的大型回转窑用引风机变频调速改造的节能预测和在钢厂在的实际应用。

A high2efficiency coupling system was designed by using t heo ry of optical fiber coupling for t he high2power laser and t he beam t ransform , and in t he system numerical values of lens′apert ure and focus were optimized.

本文针对工业用大功率固体激光的特点，对光纤耦合系统的光束变换，大功率激光聚焦耦合的束宽等影响光纤耦合效率的问题进行了分析。

The test bedstand which is composed of electro-motor ,hydraulic pump ,hydraulic motor ,speed verily box and parallel compensating pump, can resolve the problem of power consumption and the power warm while large power hydraulic pump and motor testing.the principle of system is that electro-motor drive the hydraulic pump first,then the pump make the hydraulic motor work through its high pression oil,the follow working hydraulic motor feedback the power in niuju re-drive the hydraulic pump,at last the power is recovered.this bedstand make use of bishi hydraulic system ,which can have a closely construct ,and steadly chuandong ,lower noise ,high power recovery percentage and so on.

本实验台由电动机、油泵、油马达和变速箱以及并联补油泵等一起构成功率反馈实验油路，以解决大功率液压泵及马达在试验时的大功率消耗和能量耗散时的发热问题。实验台由电动机带动油泵，油泵输出油液驱动液压马达，油马达输出的扭矩通过变速箱传动回馈给液压泵的输入轴，从而实现功率回收。采用闭式液压系统，结构紧凑、运行平稳、噪声低、功率回收率高；机械补偿，电动机输入扭矩经变速箱传动驱动液压泵；液压补偿，并联补油泵对系统的高压油路进行流量补偿。

ABSTRACT At the beginning of 1990's, with the voice of emission control in the mediumspeed and heavy duty diesel field gathering up increasingly and the rule upbuilt, the research on applying electronic control injection technique in the medium-speed and heavy duty diesel has been put up in some corporations.

九十年代初，随着中速大功率柴油机领域内排放控制呼声的日益高涨和法规的建立以及在小型高速机上电控技术的成熟发展，一些厂家便开始了电控喷射技术在中速大功率柴油机上的应用研究工作。

Based on the hydraulic system design of one type of borers,comparing to the load-sensing technology,a new method of decreasing startup torsion of high-power hydraulic pump is adopted.

针对某型号钻机液压系统的设计，对比目前广泛运用的负荷传感降低大功率液压泵启动扭矩技术，设计采用了一种新型的大功率液压泵低扭矩启动的方法。

Along with the development of the modern and high technique war, put forward the new needs to the big power microwave vacuum tube, and provided the good environment for its development.

随着现代高技术战争的发展，对大功率微波电子管提出了新的需求，并为其发展提供了良好的环境，促使真空电子器件向更大功率、更宽频带、高效率和高可靠性方向快速发展。

This research improves the impedance marching method, by varying duty cycle in a DC-DC converter to make the apparent load impedance matching with current system impedance, and reach the mpp operation.

本论文是改善阻抗匹配法，使其在不同照度下皆能准确做最大功率点追踪，并且应用阻抗匹配法在实际的太阳光能发电系统，经由调整DC-DC转换器中的主动开关之责任周期来达到负载与太阳能板的匹配，达成最大功率传输。

Because the THz is between the millimeter wave and the infrared, it is difficult to produce the THz radiation resonance. But the application such as the radars and far distance detecting need great power THz resource. The gyrotron is the only device who can produce great power THz wave.

由于THz波段处于毫米波与红外线之间，THz辐射的产生困难很大，目前THz源的输出功率大多在毫瓦数量级，对于雷达、远距离探测等重要应用，需要瓦级以上的大功率THz辐射源，回旋管是目前唯一可在THz波段实现大功率输出的器件，其输出功率可达千瓦量级。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。