circuit power factor 中文意思是什麼
circuit power factor
解釋
電路功率因數-
Monitor apparatus can measure valid value of three phase voltage and current, power factor, three phase disequilibrium, instant flecker of short time and harmonic without twenty, degree and harmonic distortion total. the paper are laid on the following. ( 1 ) master plan and function of circuit, ( 2 ) hardware design including circuit and principle of a / d conversion, phase lock, liquid crystal display and keystroke and so on, ( 3 ) design of system software including digital filtering, fft, a / d conversion and monitor interface of pc, ( 4 ) system test
監測儀能夠完成包括三相電壓、三相電流的有效值、功率因數、三相不平衡、電壓短期閃變、以及20次內的諧波、諧波相位、諧波失真總量等的測量。論文重點介紹了以下幾部分： （ 1 ）電路的總體設計和功能； （ 2 ）硬體設計，包括a d轉換、鎖相環、液晶顯示和按鍵輸入等原理和電路。 （ 3 ）系統軟體設計，包括a d轉換、 fft 、數字濾波等程序的原理和演算法以及上位機監控界面的設計； （ 4 ）系統測試。 -
Heating principle of intermediate frequency induction furnace and some factors affecting its power factor are discussed, some betterments that parallel connection spacer circuit is replaced by interfusion connection spacer circuit are put in practice
摘要對中頻感應爐的加熱原理以及其功率因數的影響因數進行了探討，並將不能恆功率輸出的並聯逆變電路改進為混聯逆變電路。 -
Be familiar with hv, mv and lv power distribution systems and power factor correction study & harmonic analysis, ups and dc power systems, power fiscal metering, and all necessary calculations to one project including short circuit calculation and protective device coordination study, lightning protection calculation, generator power calculation etc
熟悉項目中的高、中、低壓配電系統和功率因素補償研究及諧波分析， ups和直流電氣系統，功率計量，相關計算（包括短路計算和保護裝置協調分析，照明保護計算，發電機功率計算等） 。 -
It can acquire the voltage on the test appliance and current in the circuit. and it can see these electrical signals as its input and calculates based on the data and gives the parameters and waveform that user needed. the parameters we can get through calculation include power factor, joule ' s integral, available value, maximal value, minimum value, time constant etc. recently, there are many scholar is studying the algorithm that calculate the parameter using test data, but many of them adopt the heuristic method, not using the test data directly
本課題研製一套電器試驗參數高速採集系統，能夠檢測試驗迴路中試品上的電壓信號和迴路中的電流信號，並根據這些電信號的數值利用計算機進行在線計算，並給出用戶需要的各種電參數值和用戶需要的波形圖，通過計算得到的電器參數有功率因數、焦耳積分、有效值、最大最小值、時間常數等。 -
With an aim at this problem, this paper suggests the modulation scheme with dc bus voltage ripple by using the front - end active power factor correct circuit based on the analysis of necessary conditions of producing acoustic resonances
針對這一現象，在分析產生聲諧振的必要條件的基礎上，重點提出了利用前級有源功率因數校正電路的直流母線脈動電壓的調制方案。 -
This paper describes mainly system functions, measuring methods, circuit design, software program and errors analysis of a new type of measuring instrument. this instrument can measure and monitor electric parameters in single - phase circuits, three - phase ( three - wire or four - wire ) circuits. this system can be applied to electric devices and power plants, transformer substations with harmonic pollution. it can measure current, voltage, power, energy, frequence, power factor etc. it also can detect load quality, phase sequence, alarm, display and print results, as well as detect and dispose negative power
該儀器適用於含有諧波污染情況下的機電設備現場、發電廠、供電局、企業變電所現場，可用來測量電流、電壓、有功功率、無功功率、視在功率、有功電能、無功電能、視在電能以及頻率和功率因數等電參數，並具有負載性質（感性、容性）判別，正、逆相序判別指示功能；超限報警功能；列印記錄功能和負功檢測及處理功能。 -
The basic theory for all sorts of power factor correction is analyzed, and the topology and control circuit are studied
分析了各種功率因數校正的基本工作原理，並從主電路的拓撲形式和控制方式分析了各類有源功率因數校正的方法。 -
High - voltage fuses. part 3 : determination of short - circuit power factor for testing current - limiting fuses and expulsion and similar fuses
高壓熔斷器.第3部分:試驗限流熔斷器和排氣式及類似型式熔斷器的短路功率因數的測定 -
With promulgation and obliging actualization of iec 1000 - 3 - 2 etc. international standards, power factor correction ( pfc ) technique become a hotspot of research in power electronics field. based on average current mode, the paper introduce the design and implementation of a fully digital controlled single - phase boost power factor corrector with fast response. the control - loop circuit is realized using digital control and the corrector can tend to unity power factor, lower current harmonics and high transfer efficiency
本文在平均電流模式控制的有源功率因數校正技術的基礎上，設計了一種控制電路基於數字信號處理器（ dsp ） 、主電路採用boost變換器拓撲結構的全數字單相功率因數校正器，用數字電路代替傳統的模擬電路來實現對整個迴路的控制，最終使得校正器具有輸入功率因數接近於1 、低電流諧波以及高轉換效率的特性。 -
The input of traditional ac - dc converter is diode - capacitance combined circuit. it ? input current wave presents pulse shape, and the power factor ( pf ) on ac line side is low
傳統的ac ? dc開關變換器輸入端是二極體整流-濾波電容組合電路，其輸入電流波形呈脈沖狀，交流網側功率因數很低。 -
And the correction circuit is designed on example of the l6560 power factor correction chip. 4 、 on the above theoretical basis, the system of the quick - start controller for
3 .以上述理論為基礎，對250w金屬鹵化物燈快啟控制器的系統進行了理論分析，並對工作電路的主要參數進行了設計。 -
It consists of forward stage and backward stage, of which the forward stage is a single - phase boost power factor correction circuit using ic uc3854. the backward stage main circuit is a full - bridge converter using phase - shifting control soft - switching technique
該開關電源分為前級和后級，前級為採用boost結構的單相有源功率因數校正電路，后級為採用移相控制軟開關技術的全橋變換器。 -
Abstract : this paper introduces a new power factor meter with sample hod circuit and divider and provides basic measurment circuit. experiment result proves the practicality of the power factor meter
文摘:本文介紹了利用采樣保持器和除法器實現的功率因數測量儀表，給出了測量電路原理圖，實驗結果表明了該測量儀表的實用性。 -
Isolated boost converter has advantages of high frequency electrical isolation, multi - output solutions, lower input ripple current and high reliability for the short circuit of load, etc. it is attractive in applications such as high voltage multiple outputs with isolation requirement, single stage power factor correction and bi - directional dc / dc converters
電氣隔離型boost變換器具有高頻電氣隔離，易於多路輸出，輸入電流紋波小，負載短路時可靠性高等優點。它適用於有隔離要求的高壓多路輸出、雙向pwm直流變換和單級pfc等場合。 -
The double dsp devices are used to sample data and process the signals in the power disturbance monitoring and analyzing part. the power quality conditioner integrates active power compensation with passive power compensation, and improving power quality with improving power factor. the conditioner circuit consists of tri - level pwm converters, in which there are two active power filters ( apf ) that is a shunt apf and a series apf
電能質量監測分析系統採用雙dsp實現系統的采樣、信號處理，完成電能質量全程監測與分析；電能質量調節系統則採用有源與無源、改善電能質量與改善功率因數相結合的策略，有源部分以三電平pwm為主電路，由並聯和串聯apf （ activepowerfilter ）相結合、共用直流電源，構成其主體框架，並以無源調節配合有源調節來降低系統的綜合造價，力圖將電能質量調節技術在10kv配電系統中得到實用與推廣。 -
The practical circuit presented a power factor of 0. 97, a harmonic percent ( input current ) of 6. 5 % and an overall efficiency of 97. 5 %. the results accord with iec555 - 2 and have been used to validate the theoretical analysis and demonstrate the effectiveness of the proposed technique
實驗結果表明該種均流技術對于實現中大功率的apfc電路是十分有用的，與其他均流技術相比，減少了成本，簡化了電路結構，使該電路的均流特性得到改善，同時也驗證了文中採用的設計方法是可行的。 -
The dq equivalent circuit model of three - phase three - switch boost type power - factor - correction is proposed firstly, the completely dc steady - state analysis and ac small - signal analysis are done and the dc operation points and ac transfer functions are acquired
3 .首次提出三相三開關boost型功率因數校正的dq等效電路模型，並對其進行了完整的直流穩態和交流小信號分析，得到直流工作點和交流傳遞函數。 -
On the basis of theory analyzed, a circuit card used in intelligent node subsystem has been developed by means of development tools, such as c96, protel99se, pcb99, sja1000, and 80c196kc. the power factor dynamic compensation system host subsystem has been developed by means of database, artificial intelligent technology, and dll technology. host subsystem is made up of man - interface module, intelligent analyzing module, and database module
基於研究的理論成果，利用80c196kc16位單片機、 can通訊晶元sja1000 、高效編譯工具c96 、電子電路繪制軟體prote199se 、 pcb99等工具開發了智能節點的電路板；利用快速開發工具c + + builder5 . 0和數據庫管理軟體sqlserver7 . 0 ，綜合應用數據庫、人工智慧、 dll等技術開發了功率因素動態補償上位機子系統的原型。 -
Circuit power factor
迴路力率 -
Fuses for voltages exceeding 1000 v a. c. guide to the determination of short circuit power factor
1000v以上交流電熔斷器.第3部分:短路功率因數測定指南
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