useful torque 中文意思是什麼
useful torque
解釋
有效轉櫃-
A mathematic model of the motor is builded and emulated through matlab. the low - speed and constant - torque, high - speed and constant - power state is analyzed and researched, also the software approach of simulation to the driver has been done, a digital signal processor tms320lf2407 is developed successfully to control the perm square - wave bldcm driving airscrew of solar powered unmanned engine. it is useful to the further study
在matlab下建立了電機的數學模型，通過計算機模擬，驗證了數學模型的正確性，同時在理論上對低速恆轉矩高速恆功率運行進行了分析與研究，提出了一種用模糊控制的方法實現恆功率控制，並對驅動器進行了系統模擬，成功的研製了以數字信號處理控制器tms320lf2407為控制核心的驅動器，控制無刷直流電動機驅動太陽能無人飛機的螺旋槳，為後面繼續研究工作提供了參考。 -
Applying relative arithmetic to all kinds of faults and calculating off - line, we can master time - distance relation chart for all kinds of faults. computation indicates : when transmission lines occur faults, the data window of protection algorithm consisting of prefault and postfault data at the same time has important significance. the following methods are useful to achieve the inverse time characteristic : calculating impedance by using flourier in a full cycle, calculating work voltage by using fault component, calculating the torque created by a phase comparator or a magnitude comparator
實際的計算表明：輸電線路發生故障后，用故障前後的數據同時充滿保護演算法的數據窗，對于快速切除近區故障具有很重要的意義；同時利用故障前後的數據，下述方法可以比較好地實現距離保護的反時限特性：直接用全周傅里葉演算法進行阻抗計算；採用工頻變化量阻抗繼電器進行工作電壓的計算；採用轉矩的思想進行轉矩的計算。 -
To overcome the second, the transmission needs to include a gearbox providing a range of different ratios of input to output speed, enabling the engine ' s speed to be maintained within the useful range of torque output over a more or less wide range of vehicle speeds
對于第二個問題，可利用變速箱來安排不同的輸入輸出比，使發動機保持一定的轉速，以便提供保持車輛速度的有效扭矩輸出。 -
If the average or instantaneous torque, rotate - speed and power can be got exactly, expediently and reliably, it will be useful for improving the performance of the engine
若能準確、可靠、方便地測出受試機械的平均或瞬時的轉矩、轉速和功率，這對改進和提高旋轉動力機械的性能大有裨益。
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