查询词典 power frequency

A power ultrasonic supply ,which can realize zero phase difference frequency tracing and fixedness of output power,is presented in this paper.

本文介绍了一种具有无相差频率自动跟踪和输出功率恒定功能的功率超声电源，此电源采用集成锁相环来实现无相差自动频率跟踪，采用 PWM方式控制 BUCK电路的斩波，达到恒功率及功率可调的目的。

Power System forced power oscillation is a kind of low frequency oscillation caused by persistent periodic small disturbance.

电力系统强迫功率振荡为持续的周期性小扰动所引起低频振荡现象。

Research results: Kolmogorov entropy is more than zero, lyapunov exponents tend to zero, correlation dimension is real number of more than 3, negative power appears partially in power spectrum in lower frequency and the FCA diagram as certain inclination.

研究结果：kolmogorov熵大于0，Lyapunov指数趋于0，关联维为大于3的实数，功率谱图中在低谱部分出现负幂，PCA图具有一定的斜率。

Digital Inverter Generator, Power Tool , Steam Wallpaper Stripper, Electric Airless Paint Sprayer , Jig Saw, Electric Planer , Bench Grinder , Water Grinder , Belt Sander, Mini Grinder , Electric Auto ScrewDriver, Reciprocating Saw, Hammer Drill, Demolition Breaker , Thickness Planer Band Saw, Miter Saw , Table Saw , Route Table , Scroll Saw Bench Planer , Parts Washer , Diamond Core Drill , Magnetic Drill , Rebar Cutter , Electric Punching Cutter, Drywall Sander , Air Pump, Cordless Angle Grinder , Cordless Circular Saw , Cordless Spiral Saw, Cordless Jigsaw , Cordless Planer, Cordless Vaccum Cleaner Cordless Reciprocating Saw, Cordless Delta Sander , Cordless Falre Tool, Flaring Tool Cordless Ratary Light, Cordless Tool Set, Cordless Tool , Cordless Drill , Cordless Hammer Drill , Polishing Machine, Cordless Car Polisher, Cordless Impact Wrench , Gasoline Impact Wrench, Cordless Caulking Gun , 12V Auto Jack, Impact Wrench Car Polisher Garage Tool , Cordless Caulking Gun, Gasoline Pressure Washer , High Pressure Washer , Tile Cutter, Masonry Saw, Tile Saw , Construction Machinery , Flat Vibrating Polisher , Vibrating Spear, Plug-in frequency vibrato, r Rammer, Power Trowel, Plate Compactor, Concrete Mixer , Steel Cutter , Chain Saw Gasoline Chainsaw Cordless Chain saw , Electric Chain Saw , Pole Saw , Chainsaw Sharpener , Chipper Shredder , Earth Auger Gasoline Tiller , Cropper Grass Trimmer, Brush Cutter Hedge Trimmer , Lawn Mower Electric LawnMower , Cordless Lawn Mower, Gasoline Lawn Mower Hand Push Cylinder Mower Leaf Blower , Gasoline Leaf Blower , Garden Pump , Hover Mower , Lawn Raker Motor Hoe , Snow Thrower , Log Splitter , Firewood Cutting Saw , Log Saw , Diesel Tiller Gasoline Tiller Gasoline Chipper Shredder, Chipper Shredder Gasoline Grass Trimmer , Gasoline Brush Cutter, Electric Brush Cutter , Electric Grass Trimer, Lawn Edgers, Cordless Grass Trimmer Electric Hedge Trimmer

数字变频发电机，电动工具，汽提塔壁纸，电动喷雾器气油漆，曲线锯，电动刨床，砂轮机，水磨机，砂光机，小型磨粉机，电动汽车螺丝刀，往复锯，锤钻，拆除断路器，带厚度刨床锯，锯字，表看到，路由表，滚动看到板凳刨床，部分洗衣机，钻石核心的演习中，磁性钻，钢筋切割机，电动切割机穿孔， Drywall桑德，空气泵，无绳角磨机，无绳圆锯，无绳螺旋看见，无绳拼图，无绳刨床，无绳吸尘器无绳往复锯，无绳三角洲桑德，无绳Falre工具，燃烧工具，无绳Ratary轻，无绳工具集，无绳工具，无绳演练，无绳锤钻，抛光机，抛光车载无线电话，无绳冲击扳手，汽油冲击扳手，无绳堵漏枪， 12V的汽车千斤顶，扳手影响车库汽车抛光工具，无绳堵漏枪，汽油压力，洗衣机，高压清洗，瓷砖切割机，泥瓦工看到，瓷砖看到，工程机械，平板振动抛光，振动长矛，插入式高频颤音，俄夯，电力抹子，板机，混凝土搅拌机，钢刀具，汽油链锯电锯无绳链锯，电链锯，锯极点，电锯磨刀，琼斯碎纸机，地球俄汽油分蘖，克罗珀基层裁纸机，刷机对冲裁纸机，割草机电动LawnMower ，无绳割草机，汽油割草机手推割草机缸叶片风机，风机叶片汽油，花园泵，悬停割草机，草坪耙汽车锄头，雪标枪，日志分流，木柴切削看到，记录看到，柴油汽油分蘖分蘖汽油琼斯碎纸机，琼斯碎纸机基层汽油机，汽油刷机，电刷镀机，电动基层三聚体，草坪Edgers ，无绳基层裁纸机机对冲电气

During construction of our country's ultra-high voltage power grid, both electromagnetic loop circuit and stressed long UHV transmission passage may lead to low frequency power oscillation.

在我国特高压电网建设过程中，高低压电磁环网和重载的长距离特高压送电通道，都可能导致电网发生低频功率振荡。

Detailed introductions were made to the application in frequency converter for unit series multi-electrical level, power bus, micro-computer control and artificial intelligence, total digitalized optical fiber control and power unit standard modulization, insulated grid bipolar transistor drive circuit intelligentize etc.

介绍了变频器的市场情况以及变频技术的现状，详细介绍了单元串联多电平、功率母线、微机控制和人工智能、全数字化光纤控制以及功率单元标准模块化、绝缘栅双极晶体管IGBT驱动电路智能化等技术在变频器上的应用。

Points out that the switching frequency、the input inductance and the output power all have great contribution to the input-current THD. When the output power goes up, the input current harmonic content keeps almost constant, thus the THD goes down.

指出开关频率、输入电感和输出功率对输入电流THD有显著影响，发现整流器输出功率增加时，输入电流谐波含量基本不变，从而输入电流THD减小。

It with wired compares mainly has the cost to be low, carries conveniently, omits the wired wiring the worry; Specially is suitable to grasping the equipment the correspondence, the battery power supply equipment, the vehicles monitoring, the remote control, the telemetering, the small wireless network, wireless copies the table, the system, the plot messenger call, the industry data acquisition system, the wireless label, the status recognition, must contacts the RF smart card, the small wireless data terminal, the safe fire protection is systematic, wireless domain and so on in external guidance system, biological signal gathering, hydrometeorology monitoring, robot control, digital audio frequency, numeral image transmission the low power loss, the microminiaturization is the current wireless correspondence product then takes along the product in particular the urgent need and the key question.

它与有线相比主要有成本低，携带方便，省去有线布线的烦恼；特别适用于手持设备的通信、电池供电设备、车辆监控、遥控、遥测、小型无线网络、无线抄表、门禁系统、小区传呼、工业数据采集系统、无线标签、身份识别、非接触RF智能卡、小型无线数据终端、安全防火系统、无线遥控系统、生物信号采集、水文气象监控、机器人控制、数字音频、数字图像传输等领域中。低功耗、微型化是当前无线通信产品尤其是便携产品的迫切要求和关键问题。无线通信的另一个关键问题是数据传输的可靠性，这取决于诸多因素，如频率选择、同频干扰、传输距离、天线选择等，这些在设计无线通信系统时都要认真考虑和比较。

LED or photo aging components: the core of IC optical mouse has a constant internal integrated circuit, the LED constant current of about 50mA, the general use of the mouse high-grade intermittent sampling technique, sent intermittent conduction current is the (sampling frequency of about 5KHz), can be in the same power under the premise of testing to enhance the power LED, the high detection sensitivity.

1发光管或光敏元件老化：光电鼠标的核心IC内部集成有一个恒流电路，将发光管的工作电流恒定在约50mA，高档鼠标一般采用间歇采样技术，送出的电流是间歇导通的(采样频率约5KHz)，可以在同样功耗的前提下提高检测时发光管的功率，故检测灵敏度高。

Compared with conventional process, the method has good process compatibility, process simplicity, strong controllability and wide application scope, is helpful for realizing low cost and high yield, and manufacturing high frequency low power consumption power junction field effect transistor having a better performance.

本发明与常规工艺流程有很好的工艺兼容性，工艺简单，可控性强，适用范围广，有利于实现低成本和高成品率，制造出性能更优的高频低功耗功率JFET。

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