wvf 中文意思是什麼
wvf
解釋
世界退伍軍人聯合會-
Suction gas pressure goes up as the compressor run at the lower speed in the lower burthen, and this is beneficial to lower systems energy - consume. when the system is controlled by wvf, the discharge change of the evaporator is not linear ; the electronic expansion valve is adopted to regulate the system superheat degree, and the controlled object is parameter time varying, accordingly, the time varying controller should be adopted
在負荷較小時，壓縮機採用低速運轉，吸氣壓力升高，這對系統降低能耗是有利的；變頻控制時，蒸發器製冷劑流量的變化並非線性；系統中採用電子膨脹閥進行過熱度控制，被控對象具有參數時變的特性，相應地宜採用變結構的控制器。 -
Vector - contorl wvf system of asynchomous motor is a high performance speed - control system and has been used in a lot of situations of high precision and high performence. in the base of vector - control, some control methods are developing, for example speed - sensorlesss control and self - adaptation control
矢量變換控制的異步電動機變頻調速系統是一種高性能的調速系統，已經在許多需要高精度、高性能的場合中得到應用。以矢量變換為基礎的許多控制方法，諸如無速度傳感器控制、自適應控制等正在發展中。 -
This thesis make a study on vector - contorl wvf system of asynchronous motor. in the course of study, making use of the mathematical model of asynchomous motor in mt axes. then both open - loop control system and close - loop vector - control system are respectively simulated with simulation block simulink in matlab
本文對異步電動機變頻調速系統進行了研究，利用異步電動機在二相同步旋轉mt坐標系下的數學模型，使用matlab中的模擬工具箱simulink分別對開環控制系統和閉環矢量控制變頻調速系統進行了模擬。 -
In the process of close - loop vector - control system, the author designed a model of current delay - loop pwm vector - control wvf system which includes speed and magnetic double close - loops and rea lized it in simulink
在閉環控制系統的模擬中，設計了一個速度、磁鏈閉環的電流滯環型pwm變頻調速系統，並且使這個閉環系統在simulink中加以實現。 -
World veterans federation, wvf
世界退伍軍人聯盟 -
But wvf can only control the air - gap flux and can not adjust the torque
調壓調頻控制只控制了電機的氣隙磁通，而不能調節轉矩。 -
Some simulation models are also used in other wvf control strategy systems
其中的一些模擬模塊也可用於其它控制策略的變頻調速系統中。 -
The simulation result has proved this two wvf systems has better static and dynamic performances
模擬結果證明這兩個變頻調速系統具有良好的動態、靜態性能。 -
This thesis analyzes the control principles of energy regulating ways in reefer units, compares the merits and demerits of these control methods in the outside working conditions of the changing burthen, and then puts forward the wvf, a entirely new energy saving regulative and control method. in addition, the thesis educes the heat response factors of container ' s round wall constructions by analyzing the dynamic heat transfer and adopting the method of heat response factors, and illustrates the refrigerated container ' s characteristics through an experiment on an empty refrigerated container
本文通過分析目前冷藏集裝箱的能量調節方式，比較了這些控制方式在箱外負荷變化的情況下的能量調節優缺點，在此基礎上提出全新的變頻能量調節控制方式：通過對冷藏箱圍壁結構的動態傳熱性能的分析和熱反應系數法的應用，得出了各圍壁結構的熱反應系數；通過冷藏箱空箱降溫實驗分析了製冷系統在空箱打冷時系統的特性。
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