變頻調速三相異步電動機恒轉矩及恒功率特性的控制(精)(留存版)
【正文】 速的障礙。在高于額定頻率以上調速時,保持電壓不變,隨轉速的升高,磁通減少,轉矩減少,從而得到近似恒功率調速,機械特性見圖2。關鍵詞??變頻調速??恒轉矩特性??恒功率特性??控制ControlCharacteristicsofConstantTorqueandConstantOutputinVariable??FrequencyAdjustable??SpeedThree??PhaseInductionMotorsSunZhenyuAbstract??Thispapergivesadescriptionofcontrollingtheconstanttorquecharacteristicsatlowfrequency(lessthan50Hz)andtheconstantoutputcharacteristicsathighfrequency(over50Hz)invariable??frequencyadjustable??speedthree??phasein
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