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"approximate" in Chinese : vt. 1.使接近。 2.接近；走近。 3.近似，約計。 ...
"circle" in Chinese : n. 1.圓；圓周；圈；環(huán)；環(huán)狀物。 2.圓形場地，馬戲 ...
"approximate" in Chinese : vt. 1.使接近。 2.接近；走近。 3.近似，約計。 4.模擬。 5.估 ...
"approximate to" in Chinese : 近擬,接近; 近于; 與…接近
"be approximate to" in Chinese : 近似, 約計
"to approximate to" in Chinese : 與.....接近
"circle" in Chinese : n. 1.圓；圓周；圈；環(huán)；環(huán)狀物。 2.圓形場地，馬戲場；(鐵路的)環(huán)行交 ...
"circle in" in Chinese : 圓形收縮
"circle-in" in Chinese : 外光圈打開
"in a circle" in Chinese : 成圓圈
"in circle" in Chinese : 內刃圓形
"appr approximate" in Chinese : 大約
"approx approximate" in Chinese : 大約
"approximate adjustment" in Chinese : 近似平差

In this dissertation , the author has accomplished the simulation of the dtc system and analyzed the corresponding results . the software of the digital control system , in which the digital signal processor ( dsp ) is used , has also been designed in the thesis . the direct torque control scheme is studied in the paper , and the simulation models of hexagon flux control system and approximate circle flux control system are presented based on the application of matlab / simulink
本文對異步電機直接轉矩控制變頻調速方法進行了研究，采用mathworks軟件公司為matlab開發(fā)的系統(tǒng)模型圖形輸入和仿真工具simulink對直接轉矩控制的六邊形和近似圓形兩種定子磁鏈控制方法進行了仿真，實現(xiàn)了有速度傳感器的直接轉矩控制系統(tǒng)的構建，從理論上證明了這兩種方法的可行性。