單位功率因數英文

• unity power factor
• unity power-factor
• unity-power factor

• "單位" 英文翻譯 :    unit
• "單位功率" 英文翻譯 :    power rate; specific power; unit power
• "磁功率因數" 英文翻譯 :    magnetic power factor
• "電功率因數" 英文翻譯 :    electric power factor
• "反功率因數" 英文翻譯 :    inverse power factor
• "功率因數" 英文翻譯 :    factor, power; pf power factor; power factor (pf); power factor cos; power-factor
• "功率因數表" 英文翻譯 :    power factor indicator; power factor meter; power-factor indicator
• "功率因數蝶" 英文翻譯 :    power factor adjustment
• "功率因數計" 英文翻譯 :    pfm; phase meter; power factor meter; power-factor meter
• "零功率因數" 英文翻譯 :    zero power factor
• "無功率因數" 英文翻譯 :    reactive factor
• "小功率因數" 英文翻譯 :    fine power factor; fine power fator
• "單位功率重量" 英文翻譯 :    weight per unit power
• "電纜功率因數" 英文翻譯 :    cable power factor
• "電路功率因數" 英文翻譯 :    circuit power factor
• "短路功率因數" 英文翻譯 :    short circuit power factor; short-circuit powerfactor
• "額定功率因數" 英文翻譯 :    rated power factor
• "負載功率因數" 英文翻譯 :    load power factor; power factor of load; power-factor of load
• "高度功率因數" 英文翻譯 :    height power factor
• "功率因數補償" 英文翻譯 :    power factor compensation; power factor correction
• "功率因數測量" 英文翻譯 :    power factor measurement
• "功率因數調節" 英文翻譯 :    power factor control; power-factor control
• "功率因數調整" 英文翻譯 :    power factor adjustment; power-factor adjustment
• "功率因數動蕩" 英文翻譯 :    power factor swing
• "功率因數改進" 英文翻譯 :    power factor improvement

• The result of simulation for the closed - loop system in the matlab illustrates that the system can provide unity power factor not only in ideal condition but also in the case of errors in missing of some current
  研究表明系統在理想情況下能實現單位功率因數而且在某相電流誤差信號丟失的非理想情況下仍然能實現單位功率因數控制。
• The conventional rectifiers produce harmonic problem in power system . while three - phase pwm voltage source rectifiers ( vsr ) can provide constant dc bus voltage and get low harmonic distortion of input current . it also has line power feedback capability
  傳統的整流裝置是電網污染的主要來源，三相電壓型pwm整流器具有輸出電壓恒定、能實現單位功率因數運行的特點，甚至可以實現電能回饋電網。
• The integrate - reset - control three - phase six - switch boost power - factor - correction is proposed . according to the equivalent circuit in the a - b - c coordination , the control equations are deduced in detail . some simulations and experiments are done to validate the analysis
  根據三相六開關boost型功率因數校正在a - b - c坐標系下的數學模型，采用平均法，得到實現單位功率因數所需的控制方程并用積分復位控制電路加以實現。
• With the serious problem of harmonics pollution to the power system , as well as the need of high performance of ac drive application , three - phase pwm rectifiers have been as active research topic in power electronics recently , due to the virtues , such as sinusoidal input currents , unity power factor , steady output voltage , good dynamics and bin - directional energy flow
  隨著電網諧波污染問題日益嚴重和人們對高性能電力傳動技術的需要， pwm整流技術引起人們越來越多的注意。三相pwm整流器可以做到輸入電流正弦、單位功率因數、直流電壓輸出穩定，具有良好的動態性能并可實現能量的雙向流動。因此， pwm整流器成為當前電力電子領域研究的熱點課題之一。
• These studies in the thesis have been done as follows : it is proved that if the three - phase single - switch boost type power - factor - correction can work in continuous - current - mode , its power factor can not reach unity . therefore , it is not qualified for high power and high requirement application . according to the ac side equivalent circuit of the three - phase three - switch boost type power - factor - correction , the equations to realize unity power factor have been deduced and realized by integrate - reset - control circuit
  本論文把積分復位控制成功應用于三相功率因數校正技術中，作了以下幾方面的研究： 1 .從理論上證明了三相單開關boost型pfc即使工作在ccm ，其功率因數也不能達到1 ，在大功率和對功率因數校正能力要求較高的場合，三相單開關boost型pfc達不到要求， 2 .根據三相三開關boost型功率因數校正交流側的等效電路，推導出實現單位功率因數所需的控制方程，并用積分復位控制電路進行實現，在理論研究的基礎上進行了仿真研究。
• First , this paper analyzes the principle of the boost type pwm reversible rectifier in detail , explores space vector method to investigate its inversion , and establishes the mathematics model in abc coordinate , coordinate , and d q coordinate respectively . secondly , this paper analyzes the control of hysteretic current method , explores the defect of hysteretic current control
  本文首先對boost電壓型pwm整流器的工作原理進行比較詳細的分析，提出了用空間電壓矢量方法分析三相單位功率因數電壓型pwm整流器的換流方式，建立了整流器在abc坐標系以及在坐標系、 dq坐標系的數學模型。