查询词典 power frequency

The article researched new type thyristor trigger that adapts the frequency of input power automatically, then analyzed the designing ways and process of frequency-tracked trigger in detail, yet validated capability of trigger through experiment and actual appliance in project, we also build up the fault-diagnosed and disposal cell of hypogyny machine with SIMATIC S7-200 PLC, besides, programmed and debugged to realize various monitor and diagnose; more, smart design make protection function more perfect and action more sensitive, so it can realize perfect swift and reliable protection under fault condition.

本文重点研究了以频压变换技术为核心的新型频率跟踪触发器，详细分析了频率跟踪触发器的设计思路和设计过程，实现了在同一移相控制电压下，当同步电压频率大范围变化时触发器输出触发脉冲的电角度保持不变的目的，满足了项目对同步电压频率变化时晶闸管准确触发的要求；并通过实验和工程实际应用验证了触发器的性能。设计了基于SIMATIC S7-200 PLC软硬件的故障诊断系统并调试了各项监控、诊断功能；实现故障条件下准确、迅速及可靠的保护。

He showed us a video frequency in which the CEO of Microsoft shouted crazily before a conference.At first, all of us laughed at the insaneness of the CEO, but when we heard the man in the video frequency said,"I love this company", and at the same time we heard Liu Chang's explanation,we fell in silence. Beyond the laughter, we were deeply impressed by the power and charm of the enthusiasm. We will benefit from it in our whole life.

他还播放了一个微软CEO在开会前近乎疯狂的大叫的视频，在视频播放的前面阶段里，大家都在为那个CEO的疯狂而感到好笑，但转到最后当视频里的人说"I love this company "以及刘畅的解说时，现场安静了下来，笑声之外，我们更多的收获是知道了热情的力量，热情的魅力，这将是我们一生都受用不完的。

The low-frequency instability in variable speed constant frequency doubly fed induction generator which is widely used in wind power generation is studied.

研究了广泛应用于风力发电的变速恒频双馈感应电机系统中的低频不稳定现象。

With the efforts of pre-processing interelectrode electrical parameters, discharge voltage and discharge current, the data acquisition system is qualified only if it can gather signal with frequency of 2MHz, the maximum frequency the pulse power source can generate.

通过对待测信号的调理，使采集系统的任务降到只需以微细电火花脉冲电源的脉冲速率进行采样即可，即速率要求为2 MHz。

Traditional frequency multiplier chain could obtain high stable and low phase noise signals, but it has complex circuit structure and needs to solve these problems of interstage circuit matching and filtering, which become prominent as the increase of operation frequency. Avalanche device is the important solid power device to generate millimeter wave signals.

传统的倍频放大链路虽然能够获得高频率稳定度、低相噪的毫米波信号，但其电路结构复杂，降低了系统的稳定性；同时还需(来源：A9bBb532C论文网www.abclunwen.com)要解决级间匹配滤波的问题，这在毫米波频段高端变得更为突出。

This paperexplores the way to analyze the time domain amplitude spectrum , frequency domain power spectrum and inverse frequency spectrum todetect faults with AI technology, especially expert system.

本文探讨了利用智能技术特别是专家系统来进行旋转机械的时域幅值谱、频域功率谱及倒频谱分析，从而进行故障诊断的方法和途径。

The results showed that the kerf width increases with the increase of the power density, pulse frequency and pulse width; the cutting speed is increased and the cutting quality is improved with increasing the pulse frequency.

结果表明，缝宽随激光功率密度、频率以及脉宽的增加而加大；提高激光输出重复频率，不仅有利于提高加工质量，而且可以增大切割速度，提高加工效率。

6800G Blu-ray version of the wireless kit is a colorful Technology recently recommended a new suite of wireless power, using zero-latency 2.4GHZ radio frequency technology, can receive information from up to 10 meters; 16 radio channels, can be automatically frequency-hopping; keyboard with full - The new ultra-thin keycap, laser character, mute better effect, and the permanent lossless.

多彩科技是国内著名的外设厂商，商品性价比非常高。6800G蓝光版无线套件是多彩科技近期全新推荐的一款无线省电套件，采用零延迟2.4GHZ无线射频科技，接收距离可达10米；16个无线频道，可自动跳频；键盘采用全新超薄键帽，镭射字符，静音效果更佳，且永久不掉字。

The Company mainly operates and acts as the agent for the following products including:frequency conversion cabinet,frequency converter,soft starter,automated control system,series of low-voltage circuit breaker,contactor,control relay,protective relay,knife switch,isolating switch,capacitor,dual power switching unit,low-voltage mutual inductor,low-voltage fuse,high-voltage vacuum circuit breaker,high-voltage mutual inductor,high-voltage load switch,high-voltage fuse,microcomputer integrated protection device and components and parts including automatic control products, Lights,button,terminal,electric meters and electromechanical products including pump,valve fan,motor,voltage transformer,wires and cables.

公司主要经营及代理的产品有：变频柜、变频器、软启动器、自动化控制系列及系列低压断路器、接器、控制继电器、保护继电器、刀开关、隔离开关、电容器、双电源切换装置、高压真空断路器、高低压互感器、高压负荷开关、高低压熔断器、微机综合保护装置及自动化控制产品、信号灯、按钮、端子、电度表等元器件及水泵、阀门、风机、电机、变压器、电线电缆等机电产品约1000多个品种、20000余种常用规格。

The paper studies UFLS with several times accelerating shedding load function, analyzes dynamic frequency characteristic of power system during UFLS, derives the formula which is served as setting rate of frequency change for criterion of accelerating shedding load, and designs the logical diagram expressing UFLS operation.

研究了同时依据频率和频率变化率两个变量，在每个频率定值处设置加速减载功能的低频减载方案。文中详细分析了低频减载过程中频率的动态特性，推导了作为加速减载判据的频率变化率整定值的计算公式。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷